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Figure 6: Pulse wave Doppler recording of at the entrance of left ventricular outflow tract (LVOT) showing abrupt decrease in velocities giving the appearance of "lobster claw". The nadir of the drop times exactly with the peak of the gradient in LVOT because the drop is caused by afterload mismatch due to mitroseptal contact. The left ventricle is unable to maintain instantaneous ejection against the sudden rise in afterload (reprinted from Sherrid et al.[35] with permission from Elsevier)

Figure 6: Pulse wave Doppler recording of at the entrance of left ventricular outflow tract (LVOT) showing abrupt decrease in velocities giving the appearance of et al.[35] with permission from Elsevier)">