Related Experiment Video
Updated: Mar 19, 2026

Optimized Protocol for the Extraction of Proteins from the Human Mitral Valve
Published on: June 14, 2017
Isolated accessory mitral valve tissue in an asymptomatic elderly patient
Toshimitsu Tsugu1, Shiro Iwanaga2, Kenichi Matsushita3
1Cardiology Division, Department of Medicine, Keio University School of Medicine, Tokyo, Japan.
Abstract:
Accessory mitral valve tissue is a membranous or tumor-like structure observed in the left ventricular outflow tract. This congenital anomaly has been reported in more than 100 cases since 1842; however, most of them were found in patients with complex cardiac malformations. We report a 72-year-old Asian woman with isolated accessory mitral valve tissue incidentally found during the evaluation of hypertension and arrhythmia. Her left ventricular outflow tract obstruction was mild. Because worsening of the left ventricular outflow tract obstruction was reported in patients without significant obstruction at the time of diagnosis, periodical echocardiographic follow-up is necessary.
More Related Videos
Related Concept Videos
Mitral Stenosis I: Introduction
Mitral Stenosis II: Clinical features and Diagnostic Tests
Mitral Valve Prolapse I: Introduction
Mitral Valve Prolapse II: Assessment and Management
Mitral Stenosis III: Medical Management
Mitral Regurgitation I: Introduction

