Extended Data Table 1. Summary statistics of patient and device characteristics in the Stanford dataset.

Data obtained from visits to Stanford Hospital between 2016 and 2018.

Stastistic	Total	Training	Validation	Test
Number of Patients	10,030	7,465	1,288	1,277
Demographics
Age, years (SD)	68 (21)	70 (22)	66 (18)	67 (17)
Female, n (%)	4,885 (49%)	3,662 (49%)	611 (47%)	612 (48%)
Heart Failure, n (%)	2,874 (29%)	2,113 (28%)	356 (28%)	405 (32%)
Diabetes Mellitus, n (%)	2,018 (20%)	1,474 (20%)	275 (21%)	269 (21%)
Hypercholesterolemia, n (%)	3,321 (33%)	2,463 (33%)	445 (35%)	413 (32%)
Hypertension, n (%)	3,936 (39%)	2,912 (39%)	525 (41%)	499 (39%)
Renal Disease, n (%)	2,004 (20%)	1,475 (20%)	249 (19%)	280 (22%)
Coronary Artery Disease, n (%)	2,290 (23%)	1,674 (22%)	302 (23%)	314 (25%)
Metrics
Ejection Fraction, % (SD)	55.7 (12.5)	55.7 (12.5)	55,8 (12.3)	55.3 (12.4)
End Systolic Volume, mL (SD)	43.3 (34.5)	43.2 (36.1)	43.3 (34.5)	43.9 (36.0)
End Diastolic Volume, mL (SD)	91.0 (45.7)	91.0 (46.0)	91.0 (43.8)	91.4 (46.0)
Machine
Epiq 7C, n (%)	6,505 (65%)	4,832 (65%)	843 (65%)	830 (65%)
iE33, n (%)	3,329 (33%)	2,489 (33%)	421 (33%)	419 (33%)
CX50, n (%)	83 (1%)	62 (1%)	12 (1%)	9 (1%)
Epiq 5G, n (%)	60 (1%)	44 (1%)	5 (0%)	11 (1%)
Other, n (%)	53 (1%)	38 (1%)	7 (1%)	8 (1%)
Transducer
X5, n (%)	6,234 (62%)	4,649 (62%)	794 (62%)	791 (62%)
S2, n (%)	2,590 (26%)	1,913 (26%)	345 (27%)	332 (26%)
S5, n (%)	1,149 (12%)	863 (12%)	141 (11%)	145 (11%)
Other or Unspecified, n (%)	57 (1%)	40 (1%)	8 (1%)	9 (1%)
Day of the Week
Monday, n (%)	1,555 (16%)	1,165 (16%)	210 (16%)	180 (14%)
Tuesday, n (%)	1,973 (20%)	1,411 (19%)	269 (21%)	293 (23%)
Wednesday, n (%)	2,078 (21%)	1,522 (20%)	270 (21%)	286 (23%)
Thursday, n (%)	2,144 (21%)	1,642 (22%)	248 (19%)	254 (20%)
friday, n (%)	2,018 (20%)	1,461 (20%)	237 (18%)	221 (17%)
saturday, n (%)	221 (2%)	155 (2%)	35 (3%)	31 (2%)
sunday, n (%)	140 (1%)	109 (1%)	19 (1%)	12 (1%)