EP Quiz Archive
EP Quiz #97
A 36-year-old female competitive cyclist with CPVT has had VF arrest on a river swim. She is on flecainide + nadolol. She requests return-to-sport clearance. What is the guidance?
EP Quiz #96
A 58-year-old with persistent AF and significant LA fibrosis (Utah stage III on MRI) undergoes extended PVI + posterior wall isolation. What is the expected 12-month outcome?
EP Quiz #95
ECG: narrow complex tachycardia at 150 bpm with no visible P waves, sudden onset, and abrupt termination with adenosine. 12-lead during tachycardia versus sinus — interpret.
EP Quiz #94
A 45-year-old with drug-resistant AF (failed PVI x2) is considered for convergent procedure. What is the approach, outcomes and patient selection for convergent ablation?
EP Quiz #93
A 62-year-old undergoes His-bundle pacing for AF with slow ventricular response and AV block. After 2 years, his His-bundle threshold rises to 2.5V. What is the management?
EP Quiz #92
A 25-year-old with an SCN5A loss-of-function mutation has asymptomatic RBBB and sinus bradycardia. No Brugada pattern at baseline. Ajmaline challenge is positive. Management?
EP Quiz #91
A 52-year-old with ischaemic CM, RBBB and QRS 148 ms is referred for CRT. Current guidelines recommend CRT for LBBB. What is the evidence for RBBB + CRT?
EP Quiz #90
A 70-year-old with AF undergoes rate control with a beta-blocker. Despite a resting rate of 72, his 6MWT shows rate >140. What is the target rate and drug strategy?
EP Quiz #89
A patient with intermittent pre-excitation and a structurally normal heart is referred. His EPS shows shortest pre-excited RR interval of 260 ms during AF. Is ablation mandatory?
EP Quiz #88
A 44-year-old with a left-lateral accessory pathway undergoes radiofrequency ablation. During lesion delivery at the mitral annulus, the aortic valve is injured. What happened?
EP Quiz #87
A 65-year-old with ischaemic CM undergoes subcutaneous ICD implantation (not eligible for TV-ICD due to infected pocket). What are the limitations of S-ICD compared to TV-ICD?
EP Quiz #86
A 24-year-old with a structurally normal heart presents with idiopathic polymorphic VT not triggered by exercise. Adenosine terminates the episodes. What is the likely mechanism?