Cardiomyocytes in the sinoatrial node This image shows a section of the sinoatrial node, a pacemaking area of the right atrium of the heart.

窦房结的心肌细胞：这张图显示了窦房结的切面，右心房的一块起搏区。

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Objective: The morphological bases of retrograde coronary sinus perfusion (RCSP) and retrograde right atrium perfusion (RRAP) were studied with pig heart model.

目的：研究以猪心为动物模型经冠状窦逆行灌注和右心房逆行灌注的形态基础。

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O. is a tunnel that connects the upper Chambers of the heart - the right atrium and the left atrium.

卵圆孔未闭会导致心脏上部腔体，即左心房和右心房之间存在一条通道连接。

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