Electrophysiological characteristsics
| Characteristic | IRVA (n=41) | ARVD (n=15) | p Value |
|---|---|---|---|
| Values are n (%) or mean (SD). | |||
| ARVD, arrhythmogenic right ventricular dysplasia; Burst/isoprenaline, rapid ventricular stimulation at varying cycle lengths and/or isoprenaline; Earliest diastolic activity, prematurity of local endocardial electrical activity preceding the onset of the QRS complex in the surface ECG; IRVA, idiopathic right ventricular arrhythmia; PVS, programmed ventricular stimulation using ventricular extra beats; RF, radiofrequency; VT: ventricular tachycardia. | |||
| Mode of VT induction | |||
| PVS | 1/31 (3%) | 14/15 (93%) | <0.0001 |
| Burst/isoprenaline | 9/31 (30%) | 0 | |
| Mapping | |||
| Fragmented diastolic potentials | 0 | 13/14 (94%) | <0.0001 |
| Earliest diastolic activity (ms) | −28 (10.8) | −80.7 (51.3) | <0.0001 |
| RF ablation | |||
| Primary success | 28/30 (93%) | 6/13 (46%) | 0.0016 |
| Not attempted | 11/41 (7%) | 2/15 (14%) | |
| Acute failure | 2/30 (7%) | 7/13 (54%) | 0.0003 |