Introduction
Atrioventricular septal defect is a group of diverse malformations
unified by having the same characteristic morphology at their
atrioventricular septal junction. It account for about 7-17% of
congenital heart disease [1]. Most patients undergo operation in
childhood and the long-term survival after operation is favorable.
However, a few patients with incomplete atrioventricular septal defect
are diagnosed in adulthood. It is suggested that the delayed operations
rise ratio to additional preoperative complications and influences
cardiac function [2]. Here, we report a rare case of adult patient
with incomplete atrioventricular septal defect that were incidentally
detected without symptom.