title: Pulsus alternans after valve replacement for aortic regurgitation.
mesh_terms: D000328:Adult; D001021:Aortic Valve / Q000601:surgery; D001022:Aortic Valve Insufficiency / Q000601:surgery*; D002304:Cardiac Pacing, Artificial; D006439:Hemodynamics; D006801:Humans; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications; D011674:Pulse