Actual Length of Diastasis for Regurgitation through Normal Mitral Valve;Cinefluorographic Demonstration

Abstract

Summary

Diastolic regurgitation of opaque contrast material can occur through normal mitral valve when the period of diastasis exceeds a specific time interval. This period of diastasis in dogs varies from 0.22 to 0.60 second, average of 0.39 second. When diastasis is shorter than this interval no regurgitation occurs, but it always occurs when prolonged beyond the critical period.