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Updated: Feb 24, 2026

Contractility Measurements on Isolated Papillary Muscles for the Investigation of Cardiac Inotropy in Mice
Published on: September 17, 2015
Midventricular Obstruction Caused by Abnormal Intra-Left Ventricular Septum and Papillary Muscles
Takaaki Samura1, Koichi Toda1, Shunsuke Saito1
1Department of Cardiovascular Surgery, Osaka University Graduate School of Medicine, Osaka, Japan.
Abstract:
Abnormal papillary muscle is a rare cause of midventricular obstruction. In this case report, hypertrophied abnormal papillary muscles and abnormal tissue growth from the septal wall formed an intra-left ventricular septum with a small hole and resulted in severe midventricular obstruction. Radical resection of both papillary muscles and the intra-left ventricular septum was performed along with mitral valve replacement to relieve the obstruction.
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