Data dictionary v0

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.
└── silent-cchs-ecg
    ├── csv
    │   ├── lead-samples-count.csv    
    │   └── rwma-outcomes.csv
    └── npy
        ├── MDC_ECG_LEAD_AVF.npy
        ├── MDC_ECG_LEAD_AVL.npy
        ├── MDC_ECG_LEAD_AVR.npy
        ├── MDC_ECG_LEAD_III.npy
        ├── MDC_ECG_LEAD_II.npy
        ├── MDC_ECG_LEAD_I.npy
        ├── MDC_ECG_LEAD_V1.npy
        ├── MDC_ECG_LEAD_V2.npy
        ├── MDC_ECG_LEAD_V3.npy
        ├── MDC_ECG_LEAD_V4.npy
        ├── MDC_ECG_LEAD_V5.npy
        └── MDC_ECG_LEAD_V6.npy

ECG

rwma-outcomes.csv Each of the 5,000 unique patients in the dataset v0 had a cardiac ultrasound within a year prior to the ECG.

Column Name	Description	Sample Data
ecg_id	Unique identifier for each ECG	33955
rwma	Flag indicating whether regional wall motion abnormality (RWMA) was identified in the patient’s cardiac ultrasound report (the cardiac ultrasound was preformed within a year prior to the ECG.) 0: No 1: Yes	1
npy_index	NumPy index of ECG	669

Lead waveforms

The ECG waveforms were shared with us as XML files. These XML files were parsed and stored in NumPy arrays. The waveforms of each lead are stored in separate NumPy arrays and contain the waveforms for that lead for all the ECGs in the dataset. The shape of each array is ({number of ECGs},1,5500). Each waveform should have 5,500 sample points. If there are less then 5,500 point the array is filled with zeroes.

Sample rate: 500 Hz
Lead amplitude units: Microvolts [uV]

lead-samples-count.csv

Column Name	Description	Sample Data
ecg_id	Unique identifier for each ECG	33955
npy_index	NumPy index of ECG	669
MDC_ECG_LEAD_I	Number of samples for this lead	5500
MDC_ECG_LEAD_II	Number of samples for this lead	5500
MDC_ECG_LEAD_III	Number of samples for this lead	5500
MDC_ECG_LEAD_AVR	Number of samples for this lead	5500
MDC_ECG_LEAD_AVL	Number of samples for this lead	5500
MDC_ECG_LEAD_AVF	Number of samples for this lead	5500
MDC_ECG_LEAD_V1	Number of samples for this lead	5500
MDC_ECG_LEAD_V2	Number of samples for this lead	5500
MDC_ECG_LEAD_V3	Number of samples for this lead	5500
MDC_ECG_LEAD_V4	Number of samples for this lead	5203
MDC_ECG_LEAD_V5	Number of samples for this lead	5500