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

## TL;DR

A rare case of mitral valve endocarditis caused complete heart block but did not involve the aortic valve.

## Contribution

This case highlights the rare occurrence of mitral valve endocarditis leading to heart block without aortic valve involvement.

## Key findings

- The patient had Streptococcus viridans bacteremia and native mitral valve endocarditis.
- Complete heart block occurred despite the aortic valve being unaffected.
- Imaging confirmed the absence of aortic valve involvement.

## Abstract

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.