Fig. 5
From: Pearls and pitfalls in comprehensive critical care echocardiography
Additional information provided by Doppler flow pattern analysis. a Flying ‘W’ sign with pulsed wave Doppler analysis of right ventricle outflow tract: a highly specific sign of pulmonary hypertension. b L-wave on mitral valve inflow: seen in relatively bradycardic patients with normal hearts or in a pathological setting in those with elevated left ventricle preload and moderate diastolic dysfunction