Native Mitral Valve Endocarditis Complicated by Intermittent Heart Block With Spontaneous Recovery: A Case Report.

Isolated native mitral valve endocarditis without aortic involvement is a rare but serious cause of complete heart block. In contrast, aortic valve endocarditis is a well-recognized cause of life-threatening conduction abnormalities due to its close anatomical relationship with the conduction system. We report the case of a 68-year-old female patient with Streptococcus viridans bacteremia, presenting with native mitral valve endocarditis complicated by complete heart block, with imaging and clinical findings confirming sparing of the aortic valve.