Patient demographics
| Number of patients | 13 | |
| Age (median, IQR) | 66 (64–75) | |
| NYHA class | I | 7 |
| II | 6 | |
| Aetiology | Dilated cardiomyopathy | 4 |
| Ischaemic | 9 | |
| Left ventricular systolic dysfunction | Moderate | 3 |
| Severe | 5 | |
| Moderate to severe | 5 | |
| Medical history | Hypertension | 7 |
| Coronary heart disease | 9 | |
| Idiopathic dilated cardiomyopathy | 4 | |
| Permanent pacemaker | 2 | |
| Medical treatment | Angiotensin converting enzyme inhibitor | 13 |
| Angiotensin receptor blocker | 2 | |
| β Blocker | 10 | |
| Diuretic | 9 | |
| Spironolactone | 1 |
Data are presented as total number of patients unless otherwise stated.
NYHA, New York Heart Association.