Key result
Brugada syndrome exhibited significantly longer filtered QRS duration at 40 Hz in lead V2 compared to V5 (147 vs 125 ms, P<0.001), a dominant right precordial prolongation distinct from ARVC.
Why the study?
Does signal-averaged ECG reveal differences in right ventricular conduction delay between Brugada syndrome and arrhythmogenic right ventricular cardiomyopathy?
Observational (n=28)
Does signal-averaged ECG reveal differences in right ventricular conduction delay between Brugada syndrome and arrhythmogenic right ventricular cardiomyopathy?
p-value: p=<0.001
Signal-averaged ECG reveals distinct patterns of right precordial conduction delay in Brugada syndrome compared to ARVC, suggesting different underlying pathophysiological mechanisms.
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May differentiate Brugada syndrome from ARVC on signal-averaged ECG; hypothesis-generating and requires prospective validation.
Furushima et al. (2007) conducted an observational in Brugada syndrome and arrhythmogenic right ventricular cardiomyopathy (n=28). Brugada syndrome vs. Arrhythmogenic right ventricular cardiomyopathy was evaluated on Filtered QRS duration (fQRSd) at 40 Hz and 100 Hz in leads V2 and V5 (p=<0.001). Brugada syndrome exhibited significantly longer filtered QRS duration at 40 Hz in lead V2 compared to V5 (147 vs 125 ms, P<0.001), a dominant right precordial prolongation distinct from ARVC.
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