Click on image to view larger version.

Figure 3 Effect of LVOT Gradient Reduction on Myocardial Relaxation and Left Atrial Pressure

The effect of septal ablation on minimum left ventricular pressure (A) and the time constant of mycardial relaxation (tau) (B) varied according to the extent of left ventricular outflow tract (LVOT) gradient reduction. Furthermore, the effects on minimum left ventricular pressure and tau were directly related to the changes in left atrial pressure from septal ablation (C and D). Closed circles = patients with resting LVOT gradients of 40 mm Hg; open circles = patients with resting LVOT gradients of <40 mm Hg.