A 21-year-old man presents with palpitations and chest discomfort one week after a flu-like illness. Vital signs: BP 118/76 mmHg, HR 102 bpm, RR 18, Temp 37.2°C, SpO2 98% on room air. Troponin is mildly elevated at 0.08 ng/mL. Echocardiography demonstrates reduced left ventricular ejection fraction of 35%. He denies orthopnea or dyspnea at rest. Which arrhythmia is he at increased risk of developing?
- A)Benign respiratory sinus arrhythmia only
- B)Bradycardia from carotid sinus hypersensitivity only
- C)Ventricular arrhythmias due to inflamed myocardiumGABARITO
- D)AVNRT due to dual nodal pathways only
- E)Atrial flutter due to congenital heart disease
Explicação
Myocarditis can inflame and injure the ventricular myocardium, creating an arrhythmogenic substrate for ventricular tachycardia or ventricular fibrillation. The recent viral prodrome, troponin elevation, and reduced ventricular function support this diagnosis. Ver explicação completa e trilha adaptativa →