Table 1 Frequency and percentage of ECGs with selected cardiovascular conditions in cohorts used in the study
Full Data (n = 1,605,268) | Development set (n = 964,741) | Holdout set (n = 640,527) | First ECG per episode in holdout set (n = 297,773) | |
|---|---|---|---|---|
Non-ST-elevation myocardial infarction | 162,274 (10.11%) | 96,828 (10.04%) | 65,446 (10.22%) | 10,713 (3.60%) |
ST-elevation myocardial infarction | 100,206 (6.24%) | 60,381 (6.26%) | 39,825 (6.22%) | 5529 (1.86%) |
Heart failure | 249,325 (15.53%) | 150,055 (15.55%) | 99,270 (15.50%) | 27,820 (9.34%) |
Unstable angina | 43,466 (2.71%) | 26,223 (2.72%) | 17,243 (2.69%) | 3416 (1.15%) |
Atrial fibrillation | 302,146 (18.82%) | 180,191 (18.68%) | 121,955 (19.04%) | 34,139 (11.46%) |
Ventricular tachycardia | 29,672 (1.85%) | 17,385 (1.80%) | 12,287 (1.92%) | 1793 (0.60%) |
Cardiac arrest | 40,505 (2.52%) | 24,100 (2.50%) | 16,405 (2.56%) | 2844 (0.96%) |
Supraventricular tachycardia | 24,146 (1.50%) | 14,286 (1.48%) | 9860 (1.54%) | 2222 (0.75%) |
Atrioventricular block | 40,013 (2.49%) | 23,936 (2.48%) | 16,077 (2.51%) | 2942 (0.99%) |
Pulmonary embolism | 32,485 (2.02%) | 19,458 (2.02%) | 13,027 (2.03%) | 4763 (1.60%) |
Aortic stenosis | 30,120 (1.88%) | 18,281 (1.89%) | 11,839 (1.85%) | 3210 (1.08%) |
Pulmonary hypertension | 36,331 (2.26%) | 21,869 (2.27%) | 14,462 (2.26%) | 4017 (1.35%) |
Hypertrophic cardiomyopathy | 4485 (0.28%) | 2904 (0.30%) | 1581 (0.25%) | 409 (0.14%) |
Mitral valve prolapse | 24,481 (1.53%) | 14,270 (1.48%) | 10,211 (1.59%) | 1949 (0.65%) |
Mitral valve stenosis | 2925 (0.18%) | 1743 (0.18%) | 1182 (0.18%) | 277 (0.09%) |
