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Clinical and Electrophysiologic Profile of Brugada Syndrome in Iranian Patients

Department of Pacemaker and Electrophysiology, Shahid Rajaie Cardiovascular Center, School of Medicine, Iran University of Medical Sciences, Tehran, Iran

For reprint information contact: Majid Haghjoo, MD Tel: 98 21 2392 2931 Fax: 98 21 204 8174 Email: haghjoo{at}rhc.ac.ir, Department of Pacemaker and Electrophysiology, Shahid Rajaie Cardiovascular Center, Mellat Park, Vali-E-Asr Avenue, Tehran 1996911151, Iran.

Clinical and electrophysiologic characteristics of 20 patients (15 males; mean age, 42 ± 9 years) with Brugada syndrome were studied. Electrocardiographic abnormalities (spontaneous in 6 and provoked in 14) were recognized in 5 symptomatic and 15 asymptomatic patients. Mean PR (188 ± 18 vs. 184 ± 24 ms) and QT (362 ± 34 vs. 382 ± 28 ms) intervals and ST-segment elevation (2.28 ± 0.42 vs. 2.70 ± 0.77 mm) were similar in both groups. The PR interval was slightly longer in males than females (191 ± 21 vs.168 ± 18 ms, p = 0.042), but ST-segment elevation (2.70 ± 0.78 vs. 2.24 ± 0.26 mm) was similar. The HV interval was longer in males than females (57 ± 4 vs. 50 ± 4 ms, p = 0.047). Ventricular arrhythmias were induced in 40% of asymptomatic patients. There was no significant difference in age, sex, PR interval, ST-segment elevation, or HV interval between inducible and non-inducible patients. A defibrillator was implanted in 8 patients. During 16 ± 2 months of follow-up, one symptomatic patient had appropriate device therapy. None of the asymptomatic and non-inducible patients experienced a cardiac event. Electrophysiologic data have no role in predicting inducibility in programmed stimulation.

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