Table 1:

Baseline characteristics of patients admitted to the hospital for an acute myocardial infarction according to the presence of ventricular tachycardia or ventricular fibrillation

Characteristics	No VT/VF (n= 9,520)	VT (n= 1,731)	VF (n= 574)	p1	p2
Age (median [IQR], years)	72 [60–81]	70 [58–79]	68 [58–77]	<0.001	<0.001
Age (years, %)				<0.001	<0.001
<55	15.3	19.5	19.0
55–64	18.3	18.9	20.4
65–74	24.5	25.0	28.9
≥75	42.0	36.6	31.7
Men (%)	55.7	66.7	67.8	<0.001	<0.001
White (%)	94.4	96.0	95.1	0.010	0.49
History of disease (%)
Coronary artery disease	36.5	36.1	35.2	0.75	0.53
Heart failure	20.8	21.1	14.8	0.83	0.001
Diabetes	32.8	27.8	23.9	<0.001	<0.001
Hypertension	65.2	60.2	57.5	<0.001	<0.001
Angina	21.4	20.8	17.3	0.56	0.018
Stroke/transient ischemic attack	12.6	10.3	8.7	0.009	0.006
Admission potassium (median [IQR], mmol/L)	4.2 [3.9–4.6]	4.2 [3.8–4.6]	4.0 [3.5–4.4]	0.017	<0.001
Length of stay (median [IQR], day)	5 [3–9]	7 [4–11]	7 [2–13]	<0.001	<0.001
In hospital complications (%)
Atrial fibrillation	15.8	24.7	27.9	<0.001	<0.001
Heart failure	35.7	43.9	47.6	<0.001	<0.001
Pulmonary edema	12.4	17.0	20.7	<0.001	<0.001
Cardiogenic shock	4.3	9.2	26.7	<0.001	<0.001
Treatment (%)
Aspirin	82.2	81.2	67.6	0.29	<0.001
ACE-I/ARBs	47.4	48.6	38.0	0.33	<0.001
Antiarrhythmic agents	12.9	27.8	40.6	<0.001	<0.001
Beta blockers	77.0	77.9	62.5	0.41	<0.001
Lipid lowering agents	40.3	39.3	24.6	0.40	<0.001
Thrombolytic therapy	11.3	21.4	22.0	<0.001	<0.001
Percutaneous coronary intervention	25.6	27.7	28.1	0.06	0.19
CABG surgery	4.6	6.9	5.8	<0.001	0.19

VT: ventricular tachycardia, VF: ventricular fibrillation (with/without VT), IQR: interquartile range, ACEI/ARBs: Angiotensin converting enzyme inhibitor/Angiotensin II receptor blockers, CABG: coronary artery bypass graft

p-value from Chi-square test and Fisher’s exact test for categorical variables and Wilcoxon rank-sum test for continuous variables; p1: no VT/VF vs. VT, p2: no VT/VF vs. VF.