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Figure 1 Sampling Locations of PW and CW Doppler in the LV and LV Outflow Tract
The midsystolic drop of left ventricular (LV) ejection velocity is recorded with pulsed-wave (PW) Doppler in the apical 5-chamber view with the sample volume placed approximately 2.5 cm apical to the level of the tips of mitral leaflets (X). The continuous-wave (CW) Doppler (dashed line) traverses both the LV outflow tract and the medial LV cavity; velocities from both sites are recorded simultaneously.
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