Table 1.

Clinical characteristics of patients with heart disease.

Patient number	ES (N = 10)	CHD (N = 8)
Age, years old	52.7 ± 12.4	67.3 ± 9.7
Male, n (%)	6 (60)	5 (62.5)
Left ventricular ejection fraction, %	38.3 ± 17.6	58.1 ± 17.2
Coronary artery disease, n (%)	6 (60)	8 (100)
Non-ischemic cardiomyopathy, n (%)	4 (40)	0 (0)
Severe valvular disease, n (%)	1 (10)	2 (25)
Heart failure, n (%)	7 (70)	1 (12.5)
Beta-blockers, n (%)	8 (80)	7 (87.5)
Amiodarone, n (%)	2 (20)	2 (25)
Verapamil, n (%)	1 (10)	0 (0)

All values are presented as means ± SD or n (%).