title: Proceedings: Doppler blood velocity studies in patients with unstable aortic regurgitation.
mesh_terms: D001022:Aortic Valve Insufficiency / Q000503:physiopathology*; D001783:Blood Flow Velocity / Q000379:methods; D004697:Endocarditis, Bacterial / Q000503:physiopathology; D006350:Heart Valve Prosthesis; D006801:Humans; D011183:Postoperative Complications; D014465:Ultrasonics