Acute perimyocarditis associated with infection.

Perimyocarditis involves inflammation of the heart muscle and surrounding tissue, causing reduced left ventricular ejection fraction. Typically viral, but occasionally bacterial, this condition can arise from , a rare yet potentially serious pathogen that can lead to cardiac inflammation and subsequent heart failure. Since this bacterium is mainly associated with cat scratch disease-which is self-limiting and has a mild disease course potential role in cardiac disease is underestimated.