Relationship between ventricular late potential and ventricular tachycardia in arrhythmogenic right ventricular cardiomyopathy

Objectives To investigate the relationship between ventricular tachycardia(VT) and ventricular late potential(VLP) in patients with arrhythmogenic right ventricular dysplasia /cardiomyopathy(ARVD /C).Methods Patients with ARVD/C,aged(35±15) years,including 28 men and 10 women,were received signal-averaged electrocardiography to record total QRS duration(QRST),low potential terminal signals(LPS40),root mean square of the last 40 ms(RMS40) and 24 h-Holter monitoring for recording VT and premature ventricular complex.Results 1.Among 25 patients with VLP,eighteen suffered from VT;while 13 patients without VLP,only three suffered from VT,P =0.004.2.In the 21 patients with VT and 17 patients without VT,QRST was from 109 ms to 233 ms(M=147) and from 85 ms to 158 ms(M=104 ms),P=0.000;LPS40 was from 15 ms to 158 ms(M=53 ms) and from 6 ms to 63 ms(M=27 ms),P=0.001;RMS40 was from 1.6 μV to 6.0 μV(M=7.6μV) and from 8.2 μV to 163 μV(M=28 μV),P=0.000,respectively.Conclusions The VLP may be valuable to forecast the risk of ARVD /C.