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Hepatic Vein Doppler Waveform WAVE | DIRECTION | PHASE OF THE CARDIAC CYCLE | MECHANISM OF GENERATION a - Retrograde - Atrial Systole s - Antegrade - Ventricular Systole v - Transicional (antegrade, retrograde or neutral) - End Ventricular Sytole d - Antegrade - Ventricular diastole #HepaticVein #Doppler #Waveform #diagnosis #pocus #comparison #interpretation