Physionet ECG Waveform Databases Summary

High level summarization of ECG datasets taken from Physionet.org
created: modified: status: in-progress reading time: 17 mins

Initialize WFDB Databases

Pull all of the PhysioNet WaveForm DataBase collections related to ECG, according to their ECG Archive

#!/bin/bash

ecg_database_keys=(
    "aami-ec13"
    "edb"
    "ltstdb"
    "mitdb"
    "nstdb"
    "staffiii"
    "chfdb"
    "ecgcipa"
    "ecgdmmld"
    "ecgrdvq"
    "ecgiddb"
    "szdb"
    "qtdb"
    "shareedb"
    "nifeadb"
    "adfecgdb"
    "aftdb"
    "cudb"
    "iafdb"
    "ltafdb"
    "macecgdb"
    "afdb"
    "cdb"
    "ltdb"
    "vfdb"
    "nsrdb"
    "stdb"
    "svdb"
    "nifecgdb"
    "afpdb"
    "ptbdb"
    "incartdb"
    "sddb"
    "vfdb"
)

for db_key in "${ecg_database_keys[@]}"
do
        echo $db_key;
        if [ -d "$db_key/physionet.org/1.0.0" ]; then
                echo "\t$db_key/physionet.org/1.0.0 exists...";
        else
                wget -r -N -c -np -P $db_key --cut-dirs=2 https://physionet.org/files/$db_key/1.0.0/;
        fi
done

curdir=$(pwd)
for db_key in "${ecg_database_keys[@]}"
do
        echo $db_key;
        cd $db_key;
        mv "physionet.org/1.0.0/"* .;
        sha256sum -c SHA256SUMS.txt --quiet;
        cd $curdir;
        echo "";
        #mv $db_key wfdb;
done

Quick dataset information

%matplotlib inline
import glob
import os
import wfdb

from matplotlib import pyplot as plt
from pprint import pprint
ecg_database_keys = (
    "aami-ec13",
    "edb",
    "ltstdb",
    "mitdb",
    "nstdb",
    "staffiii",
    "chfdb",
    "ecgcipa",
    "ecgdmmld",
    "ecgrdvq",
    "ecgiddb",
    "szdb",
    "qtdb",
    "shareedb",
    "nifeadb",
    "adfecgdb", # uses EDF format
    "aftdb",
    "cudb",
    "iafdb",
    "ltafdb",
    "macecgdb",
    "afdb",
    "cdb",
    "ltdb",
    "vfdb",
    "nsrdb",
    "stdb",
    "svdb",
    "nifecgdb",  # uses EDF format
    "afpdb",
    "ptbdb",
    "incartdb",
    "sddb",
    "vfdb"
)
all_dbs = dict(wfdb.get_dbs())
missing_keys = []
ecg_dbs = {}

for ecg_db_key in ecg_database_keys:
    if ecg_db_key not in all_dbs:
        missing_keys.append(ecg_db_key)
        continue
    print(ecg_db_key, f"\n\t{all_dbs[ecg_db_key]}")
    ecg_dbs[ecg_db_key] = all_dbs[ecg_db_key]

if missing_keys:
    print('-' * 30)
    print("Missing keys:", missing_keys)
aami-ec13 
    ANSI/AAMI EC13 Test Waveforms
edb 
    European ST-T Database
ltstdb 
    Long Term ST Database
mitdb 
    MIT-BIH Arrhythmia Database
nstdb 
    MIT-BIH Noise Stress Test Database
staffiii 
    STAFF III Database
chfdb 
    BIDMC Congestive Heart Failure Database
ecgcipa 
    CiPA ECG Validation Study
ecgdmmld 
    ECG Effects of Dofetilide, Moxifloxacin, Dofetilide+Mexiletine, Dofetilide+Lidocaine and Moxifloxacin+Diltiazem
ecgrdvq 
    ECG Effects of Ranolazine, Dofetilide, Verapamil, and Quinidine
ecgiddb 
    ECG-ID Database
szdb 
    Post-Ictal Heart Rate Oscillations in Partial Epilepsy
qtdb 
    QT Database
shareedb 
    Smart Health for Assessing the Risk of Events via ECG Database
nifeadb 
    Non-Invasive Fetal ECG Arrhythmia Database
adfecgdb 
    Abdominal and Direct Fetal ECG Database
aftdb 
    AF Termination Challenge Database
cudb 
    CU Ventricular Tachyarrhythmia Database
iafdb 
    Intracardiac Atrial Fibrillation Database
ltafdb 
    Long Term AF Database
macecgdb 
    Motion Artifact Contaminated ECG Database
afdb 
    MIT-BIH Atrial Fibrillation Database
cdb 
    MIT-BIH ECG Compression Test Database
ltdb 
    MIT-BIH Long-Term ECG Database
vfdb 
    MIT-BIH Malignant Ventricular Ectopy Database
nsrdb 
    MIT-BIH Normal Sinus Rhythm Database
stdb 
    MIT-BIH ST Change Database
svdb 
    MIT-BIH Supraventricular Arrhythmia Database
nifecgdb 
    Non-Invasive Fetal ECG Database
afpdb 
    PAF Prediction Challenge Database
ptbdb 
    PTB Diagnostic ECG Database
incartdb 
    St Petersburg INCART 12-lead Arrhythmia Database
sddb 
    Sudden Cardiac Death Holter Database
vfdb 
    MIT-BIH Malignant Ventricular Ectopy Database
# Iterate through all datasets, show summary information

for key, desc in ecg_dbs.items():
    db_dir = os.path.join("wfdb", key)
    print(f"{key}\n\t{desc}")
    with open(os.path.join(db_dir, "RECORDS"), "r") as f:
        records = f.read().splitlines()
    print("\tnumber of records: "+ str(len(records)))

    #for r in records:
    #    record = wfdb.io.rdrecord(os.path.join(db_dir, r))        
    #    sig_units = list(zip(record.__dict__["sig_name"], record.__dict__["units"]))

    # summarize records
    print("Records summary:")
    try:
        for r in records:
            rec_name = os.path.join(db_dir, r)
            _, fields = wfdb.rdsamp(rec_name)
            pprint(fields, indent=2)
            break
    except Exception as e:
        print(e)

    # summarize annotations
    print("Annotations summary:")
    try:
        for r in records:
            rec_name = os.path.join(db_dir, r)
            fns = [fn for fn in glob.iglob(rec_name+".*") if not fn.endswith(".hea") and not fn.endswith("dat") and not fn.endswith(".hea-")]
            if not fns:
                print("No annotation data")
                break
            for fn in fns:
                _, ext = os.path.splitext(fn)
                print(ext)
                ann = wfdb.rdann(rec_name, ext[1:], summarize_labels=True)
                print(ann.contained_labels)
                break
            break
    except Exception as e:
        print(e)
        
    print("~"* 60)
aami-ec13
    ANSI/AAMI EC13 Test Waveforms
    number of records: 10
Records summary:
{ 'base_date': None,
  'base_time': None,
  'comments': ['ANSI/AAMI EC13-1992, Figure 3a.'],
  'fs': 720,
  'n_sig': 1,
  'sig_len': 43081,
  'sig_name': ['ECG'],
  'units': ['mV']}
Annotations summary:
No annotation data
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
edb
    European ST-T Database
    number of records: 90
Records summary:
{ 'base_date': None,
  'base_time': None,
  'comments': [ 'Age: 62  Sex: M',
                'Mixed angina',
                '1-vessel disease (RCA)',
                'Medications: nitrates, diltiazem',
                'Recorder type: ICR 7200'],
  'fs': 250,
  'n_sig': 2,
  'sig_len': 1800000,
  'sig_name': ['V4', 'MLIII'],
  'units': ['mV', 'mV']}
Annotations summary:
.atr
    label_store symbol                            description
1             1      N                            Normal beat
5             5      V      Premature ventricular contraction
6             6      F  Fusion of ventricular and normal beat
14           14      ~                  Signal quality change
18           18      s                              ST change
28           28      +                          Rhythm change
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ltstdb
    Long Term ST Database
    number of records: 86
Records summary:
{ 'base_date': datetime.date(1994, 12, 9),
  'base_time': datetime.time(17, 8),
  'comments': [ 'Age: 58  Sex: M',
                'Comments:',
                'Lead 0:',
                'All ST change episodes appeared to be rate-related '
                'non-ischemic',
                'episodes characterized by J-point depression and scooping of '
                'the',
                'ST segment.',
                'Lead 1:',
                'All episodes in lead 1 are compatible with heart-rate induced',
                'non-ischemic changes and are so labeled. It is recognized '
                'that',
                'this is an arbitrary decision.',
                'This record is from the initial Long-Term ST Database of',
                'eleven 24-hour ST annotated ambulatory records (record '
                's20689).',
                'Symptoms during Holter recording: None reported',
                'Diagnoses:',
                'No coronary artery disease',
                'Treatment:',
                'Medications: None',
                'Balloon Angioplasty: No',
                'Coronary Artery bypass Grafting: No',
                'History:',
                'ST depressions but no coronary artery disease',
                'Hypertension: No',
                'Left ventricular hypertrophy: No',
                'Cardiomyopathy: No',
                'Valve disease: No',
                'Electrolyte abnormalities: No',
                'Hypercapnia, anemia, hypotension, hyperventilation: No',
                'Atrioventricular nodal conduction delay: No',
                'Intraventricular conduction block: No',
                'Previous Myocardial Infarction: No',
                'Previous tests:',
                'ECG stress test: Yes',
                'Date: No data',
                'Findings: Ischemic ST changes at high work load',
                'Thallium/Stress echo: Negative',
                'Left ventricular function:',
                'Normal',
                'Echocardiogram:',
                'Normal',
                'Coronary Arteriography:',
                'No significant disease',
                'Baseline ECG:',
                'Normal sinus rhythm',
                'Left atrial abnormality',
                'Mild ST elevation V2-V4 consistent with early repolarization',
                'Holter Recording:',
                'Date: 09/12/1994',
                'Recorder: No data'],
  'fs': 250,
  'n_sig': 2,
  'sig_len': 20594750,
  'sig_name': ['ML2', 'MV2'],
  'units': ['mV', 'mV']}
Annotations summary:
.stb
    label_store symbol description
18           18      s   ST change
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
mitdb
    MIT-BIH Arrhythmia Database
    number of records: 48
Records summary:
{ 'base_date': None,
  'base_time': None,
  'comments': ['69 M 1085 1629 x1', 'Aldomet, Inderal'],
  'fs': 360,
  'n_sig': 2,
  'sig_len': 650000,
  'sig_name': ['MLII', 'V5'],
  'units': ['mV', 'mV']}
Annotations summary:
.xws
    label_store symbol                        description
2           2.0      L      Left bundle branch block beat
8           8.0      A       Atrial premature contraction
11         11.0      j     Nodal (junctional) escape beat
12         12.0      /                         Paced beat
14         14.0      ~              Signal quality change
15          NaN    NaN                                NaN
16         16.0      |         Isolated QRS-like artifact
17          NaN    NaN                                NaN
18         18.0      s                          ST change
19         19.0      T                      T-wave change
20         20.0      *                            Systole
21         21.0      D                           Diastole
23         23.0      =             Measurement annotation
24         24.0      p                        P-wave peak
25         25.0      B  Left or right bundle branch block
26         26.0      ^          Non-conducted pacer spike
27         27.0      t                        T-wave peak
28         28.0      +                      Rhythm change
29         29.0      u                        U-wave peak
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
nstdb
    MIT-BIH Noise Stress Test Database
    number of records: 15
Records summary:
{ 'base_date': None,
  'base_time': None,
  'comments': ["Created by `nst' from records 118 and em (SNR = 0 dB)"],
  'fs': 360,
  'n_sig': 2,
  'sig_len': 650000,
  'sig_name': ['MLII', 'V1'],
  'units': ['mV', 'mV']}
Annotations summary:
.xws
cannot reshape array of size 91 into shape (2)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
staffiii
    STAFF III Database
    number of records: 520
Records summary:
{ 'base_date': datetime.date(1995, 9, 27),
  'base_time': datetime.time(20, 26),
  'comments': ['Age: 52', 'Sex: F'],
  'fs': 1000,
  'n_sig': 9,
  'sig_len': 300000,
  'sig_name': ['V1', 'V2', 'V3', 'V4', 'V5', 'V6', 'I', 'II', 'III'],
  'units': ['mV', 'mV', 'mV', 'mV', 'mV', 'mV', 'mV', 'mV', 'mV']}
Annotations summary:
No annotation data
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
chfdb
    BIDMC Congestive Heart Failure Database
    number of records: 15
Records summary:
{ 'base_date': None,
  'base_time': datetime.time(10, 0),
  'comments': ['Age: 71  Sex: M  NYHA class: III-IV'],
  'fs': 250,
  'n_sig': 2,
  'sig_len': 17994491,
  'sig_name': ['ECG1', 'ECG2'],
  'units': ['mV', 'mV']}
Annotations summary:
.ecg
    label_store symbol                                 description
1             1      N                                 Normal beat
5             5      V           Premature ventricular contraction
9             9      S  Premature or ectopic supraventricular beat
41           41      r    R-on-T premature ventricular contraction
28           28      +                               Rhythm change
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ecgcipa
    CiPA ECG Validation Study
    number of records: 11498
Records summary:
{ 'base_date': None,
  'base_time': None,
  'comments': [ 'STUDYID,USUBJID,EGREFID,EGDTC,WAVEFORM',
                'SCR-004,1001,00689D31-8491-4643-B3C8-45241FBBD47C,20170327065710.000,derived'],
  'fs': 1000,
  'n_sig': 16,
  'sig_len': 1200,
  'sig_name': [ 'I',
                'II',
                'III',
                'AVR',
                'AVL',
                'AVF',
                'V1',
                'V2',
                'V3',
                'V4',
                'V5',
                'V6',
                'VCGMAG',
                'X',
                'Y',
                'Z'],
  'units': [ 'uV',
             'uV',
             'uV',
             'uV',
             'uV',
             'uV',
             'uV',
             'uV',
             'uV',
             'uV',
             'uV',
             'uV',
             'uV',
             'uV',
             'uV',
             'uV']}
Annotations summary:
.atr
    label_store symbol     description
40           40      )    Waveform end
1             1      N     Normal beat
27           27      t     T-wave peak
39           39      (  Waveform onset
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ecgdmmld
    ECG Effects of Dofetilide, Moxifloxacin, Dofetilide+Mexiletine, Dofetilide+Lidocaine and Moxifloxacin+Diltiazem
    number of records: 8422
Records summary:
{ 'base_date': None,
  'base_time': None,
  'comments': [],
  'fs': 1000,
  'n_sig': 12,
  'sig_len': 10000,
  'sig_name': [ 'I',
                'II',
                'III',
                'AVR',
                'AVL',
                'AVF',
                'V1',
                'V2',
                'V3',
                'V4',
                'V5',
                'V6'],
  'units': [ 'mV',
             'mV',
             'mV',
             'mV',
             'mV',
             'mV',
             'mV',
             'mV',
             'mV',
             'mV',
             'mV',
             'mV']}
Annotations summary:
No annotation data
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ecgrdvq
    ECG Effects of Ranolazine, Dofetilide, Verapamil, and Quinidine
    number of records: 10455
Records summary:
{ 'base_date': None,
  'base_time': None,
  'comments': [],
  'fs': 1000,
  'n_sig': 12,
  'sig_len': 10000,
  'sig_name': [ 'I',
                'II',
                'III',
                'AVR',
                'AVL',
                'AVF',
                'V1',
                'V2',
                'V3',
                'V4',
                'V5',
                'V6'],
  'units': [ 'mV',
             'mV',
             'mV',
             'mV',
             'mV',
             'mV',
             'mV',
             'mV',
             'mV',
             'mV',
             'mV',
             'mV']}
Annotations summary:
No annotation data
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ecgiddb
    ECG-ID Database
    number of records: 310
Records summary:
{ 'base_date': None,
  'base_time': None,
  'comments': ['Age: 25', 'Sex: male', 'ECG date: 07.12.2004'],
  'fs': 500,
  'n_sig': 2,
  'sig_len': 10000,
  'sig_name': ['ECG I', 'ECG I filtered'],
  'units': ['mV', 'mV']}
Annotations summary:
.atr
    label_store symbol  description
1             1      N  Normal beat
27           27      t  T-wave peak
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
szdb
    Post-Ictal Heart Rate Oscillations in Partial Epilepsy
    number of records: 7
Records summary:
{ 'base_date': None,
  'base_time': None,
  'comments': [],
  'fs': 200,
  'n_sig': 1,
  'sig_len': 1079998,
  'sig_name': ['ECG'],
  'units': ['mV']}
Annotations summary:
.xws
cannot reshape array of size 89 into shape (2)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
qtdb
    QT Database
    number of records: 105
Records summary:
{ 'base_date': None,
  'base_time': None,
  'comments': [ '69 M 1085 1629 x1',
                'Aldomet, Inderal',
                'Produced by xform from record 100, beginning at 7:00.000'],
  'fs': 250,
  'n_sig': 2,
  'sig_len': 225000,
  'sig_name': ['MLII', 'V5'],
  'units': ['mV', 'mV']}
Annotations summary:
.q1c
    label_store symbol     description
1             1      N     Normal beat
39           39      (  Waveform onset
40           40      )    Waveform end
24           24      p     P-wave peak
27           27      t     T-wave peak
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
shareedb
    Smart Health for Assessing the Risk of Events via ECG Database
    number of records: 139
Records summary:
{ 'base_date': None,
  'base_time': datetime.time(12, 20, 53),
  'comments': [],
  'fs': 128,
  'n_sig': 3,
  'sig_len': 10322048,
  'sig_name': ['III', 'V3', 'V5'],
  'units': ['mV', 'mV', 'mV']}
Annotations summary:
.qrs
   label_store symbol  description
1            1      N  Normal beat
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
nifeadb
    Non-Invasive Fetal ECG Arrhythmia Database
    number of records: 26
Records summary:
{ 'base_date': None,
  'base_time': None,
  'comments': [],
  'fs': 1000,
  'n_sig': 6,
  'sig_len': 600052,
  'sig_name': [ 'ECG',
                'Abdomen_1',
                'Abdomen_2',
                'Abdomen_3',
                'Abdomen_4',
                'Abdomen_5'],
  'units': ['mV', 'mV', 'mV', 'mV', 'mV', 'mV']}
Annotations summary:
No annotation data
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
adfecgdb
    Abdominal and Direct Fetal ECG Database
    number of records: 5
Records summary:
[Errno 2] No such file or directory: '/home/alexander/sandbox/src/git.udia.ca/alex/ecgml_research/wfdb/adfecgdb/r01.edf.hea'
Annotations summary:
.qrs
   label_store symbol  description
1            1      N  Normal beat
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
aftdb
    AF Termination Challenge Database
    number of records: 80
Records summary:
{ 'base_date': None,
  'base_time': datetime.time(1, 28, 24),
  'comments': [],
  'fs': 128,
  'n_sig': 2,
  'sig_len': 7680,
  'sig_name': ['ECG', 'ECG'],
  'units': ['mV', 'mV']}
Annotations summary:
.qrs
   label_store symbol  description
1            1      N  Normal beat
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cudb
    CU Ventricular Tachyarrhythmia Database
    number of records: 35
Records summary:
{ 'base_date': None,
  'base_time': None,
  'comments': [],
  'fs': 250,
  'n_sig': 1,
  'sig_len': 127232,
  'sig_name': ['ECG'],
  'units': ['mV']}
Annotations summary:
.xws
    label_store symbol                        description
2           2.0      L      Left bundle branch block beat
8           8.0      A       Atrial premature contraction
11         11.0      j     Nodal (junctional) escape beat
12         12.0      /                         Paced beat
14         14.0      ~              Signal quality change
15          NaN    NaN                                NaN
16         16.0      |         Isolated QRS-like artifact
17          NaN    NaN                                NaN
18         18.0      s                          ST change
19         19.0      T                      T-wave change
20         20.0      *                            Systole
21         21.0      D                           Diastole
23         23.0      =             Measurement annotation
24         24.0      p                        P-wave peak
25         25.0      B  Left or right bundle branch block
26         26.0      ^          Non-conducted pacer spike
27         27.0      t                        T-wave peak
28         28.0      +                      Rhythm change
29         29.0      u                        U-wave peak
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
iafdb
    Intracardiac Atrial Fibrillation Database
    number of records: 32
Records summary:
{ 'base_date': None,
  'base_time': None,
  'comments': [ '<age>: 81 <sex>: F <diagnosis>: Atrial Fibrillation',
                '<medications>: Atenolol, Monopril',
                'Adenosine injected at 70 sec',
                'Note: signals are uncalibrated'],
  'fs': 1000,
  'n_sig': 8,
  'sig_len': 154500,
  'sig_name': ['II', 'V1', 'aVF', 'CS12', 'CS34', 'CS56', 'CS78', 'CS90'],
  'units': ['mV', 'mV', 'mV', 'mV', 'mV', 'mV', 'mV', 'mV']}
Annotations summary:
.qrs
   label_store symbol  description
1            1      N  Normal beat
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ltafdb
    Long Term AF Database
    number of records: 84
Records summary:
{ 'base_date': datetime.date(2003, 1, 31),
  'base_time': datetime.time(9, 30),
  'comments': [],
  'fs': 128,
  'n_sig': 2,
  'sig_len': 9661440,
  'sig_name': ['ECG', 'ECG'],
  'units': ['mV', 'mV']}
Annotations summary:
.qrs
    label_store symbol                 description
16           16      |  Isolated QRS-like artifact
1             1      N                 Normal beat
19           19      T               T-wave change
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
macecgdb
    Motion Artifact Contaminated ECG Database
    number of records: 27
Records summary:
{ 'base_date': None,
  'base_time': None,
  'comments': [ '<age>: 25  <sex>: M  <diagnoses>: (none)  <medications>: '
                '(none)'],
  'fs': 500,
  'n_sig': 4,
  'sig_len': 4000,
  'sig_name': ['ECG 1', 'ECG 2', 'ECG 3', 'ECG 4'],
  'units': ['mV', 'mV', 'mV', 'mV']}
Annotations summary:
No annotation data
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
afdb
    MIT-BIH Atrial Fibrillation Database
    number of records: 25
Records summary:
sampto must be greater than sampfrom
Annotations summary:
.atr
    label_store symbol    description
28           28      +  Rhythm change
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cdb
    MIT-BIH ECG Compression Test Database
    number of records: 168
Records summary:
{ 'base_date': None,
  'base_time': None,
  'comments': [],
  'fs': 250,
  'n_sig': 2,
  'sig_len': 5120,
  'sig_name': ['ECG', 'ECG'],
  'units': ['mV', 'mV']}
Annotations summary:
.xws
    label_store symbol                        description
2           2.0      L      Left bundle branch block beat
8           8.0      A       Atrial premature contraction
11         11.0      j     Nodal (junctional) escape beat
12         12.0      /                         Paced beat
13         13.0      Q                Unclassifiable beat
14         14.0      ~              Signal quality change
15          NaN    NaN                                NaN
16         16.0      |         Isolated QRS-like artifact
17          NaN    NaN                                NaN
18         18.0      s                          ST change
19         19.0      T                      T-wave change
20         20.0      *                            Systole
21         21.0      D                           Diastole
23         23.0      =             Measurement annotation
24         24.0      p                        P-wave peak
25         25.0      B  Left or right bundle branch block
26         26.0      ^          Non-conducted pacer spike
27         27.0      t                        T-wave peak
28         28.0      +                      Rhythm change
29         29.0      u                        U-wave peak
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ltdb
    MIT-BIH Long-Term ECG Database
    number of records: 7
Records summary:
{ 'base_date': None,
  'base_time': None,
  'comments': ['Age: 46  Sex: M'],
  'fs': 128,
  'n_sig': 2,
  'sig_len': 10828800,
  'sig_name': ['ECG1', 'ECG2'],
  'units': ['mV', 'mV']}
Annotations summary:
.xws
    label_store symbol                        description
2           2.0      L      Left bundle branch block beat
8           8.0      A       Atrial premature contraction
11         11.0      j     Nodal (junctional) escape beat
12         12.0      /                         Paced beat
13         13.0      Q                Unclassifiable beat
14         14.0      ~              Signal quality change
15          NaN    NaN                                NaN
16         16.0      |         Isolated QRS-like artifact
17          NaN    NaN                                NaN
18         18.0      s                          ST change
19         19.0      T                      T-wave change
20         20.0      *                            Systole
21         21.0      D                           Diastole
23         23.0      =             Measurement annotation
24         24.0      p                        P-wave peak
25         25.0      B  Left or right bundle branch block
26         26.0      ^          Non-conducted pacer spike
27         27.0      t                        T-wave peak
28         28.0      +                      Rhythm change
29         29.0      u                        U-wave peak
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
vfdb
    MIT-BIH Malignant Ventricular Ectopy Database
    number of records: 22
Records summary:
{ 'base_date': None,
  'base_time': None,
  'comments': [],
  'fs': 250,
  'n_sig': 2,
  'sig_len': 525000,
  'sig_name': ['ECG', 'ECG'],
  'units': ['mV', 'mV']}
Annotations summary:
.xws
    label_store symbol                        description
2           2.0      L      Left bundle branch block beat
8           8.0      A       Atrial premature contraction
11         11.0      j     Nodal (junctional) escape beat
13         13.0      Q                Unclassifiable beat
14         14.0      ~              Signal quality change
15          NaN    NaN                                NaN
16         16.0      |         Isolated QRS-like artifact
17          NaN    NaN                                NaN
18         18.0      s                          ST change
19         19.0      T                      T-wave change
20         20.0      *                            Systole
21         21.0      D                           Diastole
23         23.0      =             Measurement annotation
24         24.0      p                        P-wave peak
25         25.0      B  Left or right bundle branch block
26         26.0      ^          Non-conducted pacer spike
27         27.0      t                        T-wave peak
28         28.0      +                      Rhythm change
29         29.0      u                        U-wave peak
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
nsrdb
    MIT-BIH Normal Sinus Rhythm Database
    number of records: 18
Records summary:
{ 'base_date': None,
  'base_time': datetime.time(8, 4),
  'comments': ['32 M'],
  'fs': 128,
  'n_sig': 2,
  'sig_len': 11730944,
  'sig_name': ['ECG1', 'ECG2'],
  'units': ['mV', 'mV']}
Annotations summary:
.atr
    label_store symbol                                 description
1             1      N                                 Normal beat
5             5      V           Premature ventricular contraction
6             6      F       Fusion of ventricular and normal beat
9             9      S  Premature or ectopic supraventricular beat
14           14      ~                       Signal quality change
16           16      |                  Isolated QRS-like artifact
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
stdb
    MIT-BIH ST Change Database
    number of records: 28
Records summary:
{ 'base_date': None,
  'base_time': None,
  'comments': [],
  'fs': 360,
  'n_sig': 2,
  'sig_len': 536976,
  'sig_name': ['ECG', 'ECG'],
  'units': ['mV', 'mV']}
Annotations summary:
.xws
    label_store symbol                        description
2           2.0      L      Left bundle branch block beat
8           8.0      A       Atrial premature contraction
11         11.0      j     Nodal (junctional) escape beat
12         12.0      /                         Paced beat
14         14.0      ~              Signal quality change
15          NaN    NaN                                NaN
16         16.0      |         Isolated QRS-like artifact
17          NaN    NaN                                NaN
18         18.0      s                          ST change
19         19.0      T                      T-wave change
20         20.0      *                            Systole
21         21.0      D                           Diastole
23         23.0      =             Measurement annotation
24         24.0      p                        P-wave peak
25         25.0      B  Left or right bundle branch block
26         26.0      ^          Non-conducted pacer spike
27         27.0      t                        T-wave peak
28         28.0      +                      Rhythm change
29         29.0      u                        U-wave peak
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
svdb
    MIT-BIH Supraventricular Arrhythmia Database
    number of records: 78
Records summary:
{ 'base_date': None,
  'base_time': None,
  'comments': [],
  'fs': 128,
  'n_sig': 2,
  'sig_len': 230400,
  'sig_name': ['ECG1', 'ECG2'],
  'units': ['mV', 'mV']}
Annotations summary:
.atr
    label_store symbol                                 description
1             1      N                                 Normal beat
5             5      V           Premature ventricular contraction
6             6      F       Fusion of ventricular and normal beat
9             9      S  Premature or ectopic supraventricular beat
14           14      ~                       Signal quality change
16           16      |                  Isolated QRS-like artifact
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
nifecgdb
    Non-Invasive Fetal ECG Database
    number of records: 55
Records summary:
[Errno 2] No such file or directory: '/home/alexander/sandbox/src/git.udia.ca/alex/ecgml_research/wfdb/nifecgdb/ecgca102.edf.hea'
Annotations summary:
.qrs
   label_store symbol  description
1            1      N  Normal beat
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
afpdb
    PAF Prediction Challenge Database
    number of records: 300
Records summary:
{ 'base_date': None,
  'base_time': None,
  'comments': [],
  'fs': 128,
  'n_sig': 2,
  'sig_len': 230400,
  'sig_name': ['ECG0', 'ECG1'],
  'units': ['mV', 'mV']}
Annotations summary:
.qrs
   label_store symbol  description
1            1      N  Normal beat
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ptbdb
    PTB Diagnostic ECG Database
    number of records: 549
Records summary:
{ 'base_date': None,
  'base_time': None,
  'comments': [ 'age: 81',
                'sex: female',
                'ECG date: 01/10/1990',
                'Diagnose:',
                'Reason for admission: Myocardial infarction',
                'Acute infarction (localization): infero-latera',
                'Former infarction (localization): no',
                'Additional diagnoses: Diabetes mellitus',
                'Smoker: no',
                'Number of coronary vessels involved: 1',
                'Infarction date (acute): 29-Sep-90',
                'Previous infarction (1) date: n/a',
                'Previous infarction (2) date: n/a',
                'Hemodynamics:',
                'Catheterization date: 16-Oct-90',
                'Ventriculography: Akinesia inferior wall',
                'Chest X-ray: Heart size upper limit of norm',
                'Peripheral blood Pressure (syst/diast):  140/80 mmHg',
                'Pulmonary artery pressure (at rest) (syst/diast): n/a',
                'Pulmonary artery pressure (at rest) (mean): n/a',
                'Pulmonary capillary wedge pressure (at rest): n/a',
                'Cardiac output (at rest): n/a',
                'Cardiac index (at rest): n/a',
                'Stroke volume index (at rest): n/a',
                'Pulmonary artery pressure (laod) (syst/diast): n/a',
                'Pulmonary artery pressure (laod) (mean): n/a',
                'Pulmonary capillary wedge pressure (load): n/a',
                'Cardiac output (load): n/a',
                'Cardiac index (load): n/a',
                'Stroke volume index (load): n/a',
                'Aorta (at rest) (syst/diast): 160/64 cmH2O',
                'Aorta (at rest) mean: 106 cmH2O',
                'Left ventricular enddiastolic pressure: 11 cmH2O',
                'Left coronary artery stenoses (RIVA): RIVA 70% proximal to '
                'ramus diagonalis_2',
                'Left coronary artery stenoses (RCX): No stenoses',
                'Right coronary artery stenoses (RCA): No stenoses',
                'Echocardiography: n/a',
                'Therapy:',
                'Infarction date: 29-Sep-90',
                'Catheterization date: 16-Oct-90',
                'Admission date: 29-Sep-90',
                'Medication pre admission: Isosorbit-Dinitrate Digoxin '
                'Glibenclamide',
                'Start lysis therapy (hh.mm): 19:45',
                'Lytic agent: Gamma-TPA',
                'Dosage (lytic agent): 30 mg',
                'Additional medication: Heparin Isosorbit-Mononitrate ASA '
                'Diazepam',
                'In hospital medication: ASA Isosorbit-Mononitrate '
                'Ca-antagonist Amiloride+Chlorothiazide Glibenclamide Insulin',
                'Medication after discharge: ASA Isosorbit-Mononitrate '
                'Amiloride+Chlorothiazide Glibenclamide'],
  'fs': 1000,
  'n_sig': 15,
  'sig_len': 38400,
  'sig_name': [ 'i',
                'ii',
                'iii',
                'avr',
                'avl',
                'avf',
                'v1',
                'v2',
                'v3',
                'v4',
                'v5',
                'v6',
                'vx',
                'vy',
                'vz'],
  'units': [ 'mV',
             'mV',
             'mV',
             'mV',
             'mV',
             'mV',
             'mV',
             'mV',
             'mV',
             'mV',
             'mV',
             'mV',
             'mV',
             'mV',
             'mV']}
Annotations summary:
.xyz
    label_store symbol  description
1           1.0      N  Normal beat
63          NaN    NaN          NaN
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
incartdb
    St Petersburg INCART 12-lead Arrhythmia Database
    number of records: 75
Records summary:
{ 'base_date': None,
  'base_time': None,
  'comments': [ '<age>: 65 <sex>: F <diagnoses> Coronary artery disease, '
                'arterial hypertension',
                'patient 1',
                'PVCs, noise'],
  'fs': 257,
  'n_sig': 12,
  'sig_len': 462600,
  'sig_name': [ 'I',
                'II',
                'III',
                'AVR',
                'AVL',
                'AVF',
                'V1',
                'V2',
                'V3',
                'V4',
                'V5',
                'V6'],
  'units': [ 'mV',
             'mV',
             'mV',
             'mV',
             'mV',
             'mV',
             'mV',
             'mV',
             'mV',
             'mV',
             'mV',
             'mV']}
Annotations summary:
.atr
   label_store symbol                        description
1            1      N                        Normal beat
5            5      V  Premature ventricular contraction
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
sddb
    Sudden Cardiac Death Holter Database
    number of records: 23
Records summary:
{ 'base_date': None,
  'base_time': datetime.time(12, 0),
  'comments': [ 'Produced by xform_new from record 30, beginning at 26:35.000',
                'vfon: 07:54:33'],
  'fs': 250,
  'n_sig': 2,
  'sig_len': 22099250,
  'sig_name': ['ECG', 'ECG'],
  'units': ['mV', 'mV']}
Annotations summary:
.ari
    label_store symbol                                 description
1             1      N                                 Normal beat
5             5      V           Premature ventricular contraction
41           41      r    R-on-T premature ventricular contraction
9             9      S  Premature or ectopic supraventricular beat
10           10      E                     Ventricular escape beat
18           18      s                                   ST change
28           28      +                               Rhythm change
30           30      ?                                    Learning
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~