A teenager with adenoviral myocarditis mimicking hypertrophic cardiomyopathy

Abstract

A 14-year-old previously healthy female presented with chest pain and dyspnoea for 2 days in the setting of a recent upper respiratory infection. She had elevated inflammatory markers and troponin, resulting in the diagnosis of acute myocarditis. Transthoracic echocardiography demonstrated mild systolic dysfunction and a moderate pericardial effusion. Additionally, her echocardiogram showed concentric left ventricular hypertrophy raising concern for hypertrophic cardiomyopathy. She was treated with intravenous immunoglobulin. Serial echocardiograms revealed rapid resolution of her ventricular hypertrophy. Cardiac magnetic resonance confirmed the diagnosis of myocarditis.

Lymphocytic Myocarditis with Increased Left Ventricular Thickness: A Rare Presentation Mimicking Cardiac Amyloidosis

“…In contrast, our patient presented with increased LV thickness, which is typically a manifestation of fulminant myocarditis [ 10 ]. In addition, several cases of non-fulminant myocarditis mimicking hypertrophic cardiomyopathy with transient LV wall thickening, caused by influenza virus or adenovirus, have also been reported [ 11 , 12 ], but the type of myocarditis is unknown. We present a histopathologically confirmed case of lymphocytic myocarditis that presented with LV wall thickening that was still evident at a 2-week follow-up.…”