title: Pulsus alternans: a systolic phenomenon?
mesh_terms: D000818:Animals; D001021:Aortic Valve / Q000503:physiopathology*; D006349:Heart Valve Diseases / Q000150:complications* / Q000503:physiopathology; D006801:Humans; D009200:Myocardial Contraction; D011674:Pulse; D013599:Systole