Table 1. Descriptive characteristics of the study population.

Characteristics	n = 10
Male sex, n (%)	9 (90%)
Median age at time of tissue collection, years (range)	66.5 (50–79)
Type of surgery performed*, n (%)
CABG	7 (70%)
Valve repair/replacement	4 (40%)
Ascending aorta aneurysm	1 (10%)
History of atrial fibrillation, n (%)
Before surgery	2 (20%)
During surgery	0 (0%)
After surgery	5 (50%)

* Two patients underwent both coronary artery bypass graft (CABG) and valve repair/replacement surgery.