In a patient with history of recurrent syncope, Holter recording shows QT interval of 680msec. Which disease is suspected in this patient?
Long QT syndrome
Brugada syndrome
Arrhythmogenic RV dysplasia
Lev's disease
Normal QT interval= 360-440 msec. Option A: QT interval prolonged- predisposes to Torsades de Pointes , so Dx of this is Long QT syndrome. Option B: Channel defect (SCN5A defect) in hea-->depolarization is defective -->defective development of voltage gradient leads to arrhythmia which result in Brugada syndrome. Option C: ARVD is fibrofatty deposition in RV epicardium & in ECG presence of Epsilon wave Option D: Lev's disease characterized by fibrosis in conduction system, so will result in Bradyarrhythmia.
ECG and Arrhythmia 3