Table 1

Characteristics of the study population

CharacteristicIRVA (n=41)ARVD (n=15)p Value
Values are n (%) or mean (SD).
ARVD, arrhythmogenic right ventricular dysplasia; IRVA, idiopathic right ventricular arrhythmia; MRI, magnetic resonance imaging; PVB, premature ventricular beats; RV, right ventricular; VT, ventricular tachycardia.
Age (years)40.1 (13.4)37.4 (16.4)NS
Age range14 to 6916 to 64NS
Family history0/412/15NS
Symptoms (score)
Palpitations
    None/mild (0;1)13 (32%)1 (7%)
    Moderate (2)15 (36%)4 (27%)
    Severe (3)13 (32%)10 (66%)
Presyncope (4)11 (27%)4 (27%)
Syncope (5)2 (5%)5 (33%)
Cardiac arrest (5)02 (14%)
Mean score 2.3 (1.5)3.7 (1.3)0.0058
Presenting arrhythmia (score)
Detection on baseline ECG (Holter)33 (80%)7 (43%)0.0126
    PVB (1)10 (24%)1 (7%)
    Non-sustained VT (2)17 (42%)2 (14%)
    Sustained VT (3)14 (34%)12 (80%)
Mean score 2.1 (0.8)2.7 (0.6)0.0054
ARVD: positive/uncertain/negative
Echocardiography0/3/3612/2/1
RV angiography0/1/85/1/0
MRI0/4/114/2/1
Antiarrhythmic drugs at presentation32 (78%)13 (87%)NS