Review Article
Left Atrium by Echocardiography in Clinical Practice: From Conventional Methods to New Echocardiographic Techniques
Figure 4
Atrial contraction: wave (a) at mitral inflow (a), peak retrograde diastolic (Ar) velocity at pulmonary venous flow (b) by pulsed Doppler, and late diastolic (A′) velocity by pulsed wave tissue imaging (c).