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(A) Two-dimensional TTE, parasternal long-axis, systolic phase zoom image of the aorta (Ao) and LA without (left) and with (right) color flow Doppler demonstrates turbulent flow from the left coronary sinus into the LA that resembled posteriorly directed MR (yellow arrows). (B) Continuous-wave Doppler spectrum of this turbulent flow demonstrates a double-peak continuous flow pattern (due to the IABP) with a peak pressure gradient of 100 mm Hg (red arrows).
