In 1956, Dexter proposed that elevated right ventricular volume (RVV) associated with atrial septal defect resulted in a leftward displacement of the septum into the LV cavity, thereby altering LV filling characteristics and overall cardiac function.

• 1956年Dexter又首次提出了舒张期心室间相互作用的可能机制，即房间膈缺损右室容量增加的患者，室间隔的左移改变了左室的充盈特性和整个心功能。