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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.

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

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