Victor S, Nayak V M
Department of Surgery, Heart Institute, Vadapalani, Madras, India.
Tex Heart Inst J. 1995;22(2):192-6.
A 5-year-old boy underwent surgery at our institution for closure of an ostium secundum atrial septal defect. Median sternotomy revealed that the right atrial appendage lay at the acute margin of the heart. Atriotomy revealed that the crista terminalis was also displaced clockwise, extending from the left of the superior vena caval orifice anteriorly along the interatrial septum, to the left border of the inferior vena cava; the musculi pectinati radiated forward and to the right. This highly unusual anomaly is likely due to clockwise rotation of the atrial portion in relation to the normally positioned sinus venarum portion of the atrium, which resulted in sinoatrial malfusion.
一名5岁男孩在我们机构接受了继发孔型房间隔缺损封堵手术。正中胸骨切开术显示右心耳位于心脏的锐缘处。心房切开术显示界嵴也顺时针移位，从上腔静脉口左侧向前沿房间隔延伸至下腔静脉左缘；梳状肌向前向右放射状分布。这种非常罕见的异常可能是由于心房部分相对于正常位置的静脉窦部分顺时针旋转，导致窦房融合。
