The paradox of the paradoxical pulse.
D000818:Animals; D001011:Aorta / Q000503:physiopathology; D002305:Cardiac Tamponade / Q000266:history / Q000503:physiopathology; D004452:Echocardiography; D049670:History, 17th Century; D049672:History, 19th Century; D006801:Humans; D011312:Pressure; D011674:Pulse