Fig. 3
From: Variable open-end wave reflection in the pulmonary arteries of anesthetized sheep
Wave intensity in the proximal pulmonary artery with corresponding pressure and velocity traces over a single cardiac cycle. Negative wave intensity indicates backward-travelling waves. 1 An early forward compression wave; 2 a forward expansion wave; 3 a late forward compression wave; 4 a backward expansion wave; 5 a backward compression wave. Black waves that accelerate forward flow (forward compression and backward expansion waves); white those waves that decelerate forward flow (forward expansion and backward compression waves)