1
David H Watkins, Erwin J Klink: Heart assist method and catheter. December 7, 1976: US03995617 (209 worldwide citation)

Method and device for augmenting the action of an ailing heart having an incompetent aortic valve or incompetent left ventricle wherein blood is directly sucked from the left ventricle, while blocking flow to the aorta, and then upon reverse cycle, the blood removed is forced into the aorta, while b ...


2
Watkins David H, Klink Erwin J: Heart assist method and catheter. July 13, 1971: US3592184 (102 worldwide citation)

Method and device for augmenting the action of an ailing heart having an incompetent aortic valve, wherein blood is sucked up from the aorta, while blocking flow to the arterial tree, and then, upon reverse, a major portion of the blood is forced into the arterial tree and a minor portion forced int ...