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Patient characteristics.
| Number of patients, n | 8 |
| Gender, M/F | 6/2 |
| Age (years) | 53.3 ± 3.4 |
| Heart rate (beats min−1) a | 58.4 ± 4.0 |
| PR interval (ms) a | 179.5 ± 10.2 |
| QRS interval (ms) a | 102.0 ± 9.4 |
| QTc interval (ms) a | 431.0 ± 9.2 |
| Hypertension, n | 5 |
| Pulmonary hypertension, n | 1 |
| Diabetes, n | N/A |
| ACE inhibitors, n | 6 |
| Ca2+ antagonists, n | 1 |
| Class IC blockers, n | 4 |
| Class II blockers, n | 2 |
| Class III blockers, n | 5 |
| Lipid-lowering drugs, n | 4 |
In sinus rhythm. ACE, angiotensin-converting enzyme.
