Arrhythmic Mitral Valve Prolapse: Late Correct Diagnosis

Arrhythmic mitral valve prolapse (AMVP) is a relatively new entity in the field of arrhythmia and sudden cardiac death.

A 19-year-old female patient with a history of aborted sudden cardiac death, initially diagnosed as idiopathic ventricular fibrillation in 2012 and received implantable cardioverter defibrillator. Gradual decline in left ventricular ejection fraction and receiving multiple appropriate implantable cardioverter defibrillator shocks was odd for us. After review of her past medical documents and detailed cardiac imaging diagnosis of AMVP was made.

Individuals with AMVP are prone to left ventricular mechanical dispersion, leading to an increased susceptibility to malignant ventricular arrhythmias independent of the severity of MR.

This case emphasizes the importance of reviewing old documents and consultation with multiple subspecialists. Follow-up may alter the primary suspected diagnosis.