Figure 1

The relationship between various landmarks in the pulmonary venous flow, the mitral valve flow, and the left atrial pressure. These waveforms are related to the left atrial and left ventricular phases of the cardiac cycle, as well as the state of the mitral valve. DIA diastolic phase, LA left atrium/atrial, LV left ventricle/ventricular, MV mitral valve, PV pulmonary vein/venous, SYS systolic phase.