The best position to study Pulmonary Veins flow by spectral Doppler (PW, CW) is the apical four-chamber view. The control volume is placed in the Pulmonary Vein to the depth of 10-20 mm.

Pulmonary Vein Flow examination. Sample Volume position. Apical 4 Chamber view

 

Normally, the flow is observed both in the systole and diastole phases. Consists of a Systolic, Diastolic, and Atrial Component.

The speed of the systolic phase is greater than the diastolic, they register on top of the baseline. With the contraction of the left atrium, a small reversion of blood is observed, which is registered below the baseline.

 

• S - Systolic phase.
• D - Diastolic phase.
• Ar - Atrial Component

 

Pulmonary Vein flow. CW Doppler

 

How to Simulate Pulmonary Veins Flow (PW and CW mode)?

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