Hypersensitivity myocarditis presenting as atrioventricular block and wide complex tachycardia in a toddler.
A 13-month-old boy presented with acute onset of complete atrioventricular block and wide complex tachycardia but normal hemodynamics. Endomyocardial biopsy disclosed active myocarditis with eosinophils, suggesting a hypersensitivity reaction. With no treatment, the rhythm disturbance resolved within days of onset. Our patient's presentation and self-limited illness is unique. To our knowledge, this is only the second reported case of eosinophilic myocarditis in a young child or infant.
University of California San Francisco, Pediatric Cardiology, San Francisco, CA 94143-0214, USA.
Neil
N
Bhogal
Anita Moon
AM
Grady
Philip C
PC
Ursell
Kathryn K
KK
Collins
Lisa K
LK
Hornberger
D019980:Amoxicillin-Potassium Clavulanate Combination / Q000009:adverse effects; D000900:Anti-Bacterial Agents / Q000009:adverse effects; D054537:Atrioventricular Block / Q000175:diagnosis / Q000209:etiology*; D001706:Biopsy; D004342:Drug Hypersensitivity / Q000150:complications*; D004562:Electrocardiography; D006801:Humans; D007223:Infant; D008297:Male; D009205:Myocarditis / Q000150:complications* / Q000473:pathology; D010033:Otitis Media / Q000188:drug therapy; D013610:Tachycardia / Q000175:diagnosis / Q000209:etiology*
D000900:Anti-Bacterial Agents; D019980:Amoxicillin-Potassium Clavulanate Combination