Incidental Echocardiographic Finding of a Membranous Ventricular Septal Aneurysm in an 18-Year-Old Asymptomatic Athlete.

Membranous ventricular septal aneurysm (VSA) is an uncommon cardiac abnormality, potentially leading to several cardiac complications such as aortic valve prolapse, arrhythmias, and aneurysm rupture. A young competitive soccer player presented for a post-COVID sports cardiology assessment, denying any previous cardiological evaluations. On transthoracic echocardiography, a membranous VSA was incidentally found with no other cardiac abnormality nor hemodynamic impairment associated. A well-oriented anamnesis guided by echocardiographic findings revealed that a ventricular septal defect was diagnosed at birth with spontaneous closure at 4 years old. From that moment, no further follow-up was performed. Before granting cardiological approval to competitive sport, transesophageal echocardiography and Holter electrocardiogram were performed to confirm the absence of interventricular shunt and any other cardiac abnormality or arrhythmias associated with VSA. This case highlights the value of an accurate and comprehensive clinical and echocardiographic evaluation when performing a cardiological sports assessment, even in a young asymptomatic athlete.