Figure 2.

Mitral and Tricuspid Continuous-Wave Doppler Waveforms in Semirecumbent and Left Lateral Decubitus Positions

Supine position: (A) baseline mitral regurgitation waveform and (C) peak tricuspid regurgitation velocity of 3.1 m/s and right ventricular systolic pressure of 48 mm Hg. Left lateral decubitus position: (B) triangular-shaped mitral regurgitation Doppler waveform consistent with rapid equalization of pressures between the left atrium and left ventricle and (D) acute increase in peak tricuspid regurgitation velocity to 4.5 m/s and right ventricular systolic pressure to 75 mm Hg.