Table 2.

Primary episode of ES—causes

	Group A (n = 28)	Group B (n = 42)	p
No potentially reversible cause	24 (85.7%)	20 (47.6%)	<0.01
Acute coronary syndrome	1 (3.6%)	5 (11.9%)	0.23
Significant stenosis of the coronary artery requiring intervention	4 (14.3%)	16 (38.1%)	0.03
Infective endocarditis	0 (0%)	3 (7.1%)	0.15
Dyselectrolytemia	0 (0%)	2 (4.8%)	0.25
Discontinuation of medication	0 (0%)	1 (2.4%)	0.42
Exacerbation of heart failure	0 (0%)	1 (2.4%)	0.42
Decompensated hyperthyroidism	0 (0%)	1 (2.4%)	0.42
More than 1 cause	1 (3.6%)	7 (16.7%)	0.09