Table 2. Ventricular arrhythmia in 80 patients.

Finding	Number
Baseline ambulatory ECG
- Ventricular premature beats	73 (91%)
- Ventricular premature complexes >10/h	28 (35%)
- Ventricular couplets	29 (36%)
- Bigeminy or trigeminy, or both	24 (30%)
- Non-sustained ventricular tachycardia	9 (11%)
Ventricular tachycardia events
- Any ventricular tachycardia event*	6 (8%)
- Sustained ventricular tachycardia	4 (5%)
- Implantable cardioverter-defibrillator implantation	4 (5%)
- Sudden cardiac death	3 (4%)
- Ventricular fibrillation	2 (3%)
- Arrhythmogenic syncope	1 (1%)
- Survived resuscitation	1 (1%)

* Five patients had >1 ventricular event.