The correct answer is “Sinus rhythm, LBBB, Inferior and RV MI, AVB: Mobitz Type I”
✅ Findings: • Sinus tachycardia • 2nd-degree AVB: Mobitz Type I (Wenckebach): subtle progressive increase in PR intervals followed by a dropped QRS • Left bundle branch block (LBBB) • V1–V3 show discordant ST elevation and peaked T waves but do not meet modified Sgarbossa criteria • Discordant ST elevation in inferior leads > 25% of the corresponding R-wave amplitude, with STE in D3 > D2 suggesting inferior and possible RV MI.
A 65-year-old man with a history of diabetes presents to the ED with chest pain radiating to the epigastric area. He feels lightheaded and mildly short of breath.
This ECG shows a polymorphic ventricular tachycardia with a characteristic twisting of the QRS complexes around the isoelectric line.
Key ECG Features: • Polymorphic wide QRS complexes • Shifting axis and amplitude of the QRS complexes • Preceded by prolonged QT interval
What triggered it? • Patient was on quetiapine (QT-prolonging antipsychotic) • Started on levofloxacin (another QT-prolonging drug) • Combo + possible illness-related factors = setup for TdP
Clinical takeaway: Be cautious when combining QT-prolonging agents, especially in older or critically ill patients. A baseline ECG and electrolytes could make all the difference.
An 82-year-old man is admitted with pneumonia. He has a history of taking quetiapine for sleep. During hospitalization, he’s started on levofloxacin. A few hours after admission , his mental status declines and the patient becomes unresponsive. This ECG is obtained.