Mycoplasma myocarditis presenting with sustained SVT and acute heart failure without signs of myocardiocytolysis and extra-cardiac disease.

Key Clinical Message: Mycoplasma myocarditis is a rare but potentially serious condition that can cause inflammation of the heart muscle, leading to arrhythmia and heart failure. It is important to consider this condition in the differential diagnosis of young patients presenting with unexplained signs of heart failure and SVT, even in the absence of signs of myocardiocytolysis and extra-cardiac disease.

Abstract: infections are often underdiagnosed as a great proportion of patients remain asymptomatic, pauci-symptomatic, or exhibit varying presentations.