title: Quantifying valvular regurgitation. Limitations and inherent assumptions of Doppler techniques.
mesh_terms: D001022:Aortic Valve Insufficiency / Q000175:diagnosis*; D015150:Echocardiography, Doppler; D006801:Humans; D008944:Mitral Valve Insufficiency / Q000175:diagnosis*; D011665:Pulmonary Valve Insufficiency / Q000175:diagnosis*; D014262:Tricuspid Valve Insufficiency / Q000175:diagnosis*