Please click here to obtain permission to reproduce this image.
Click on image to view larger version.
Figure 4 Sample Hemodynamic Tracings From 4 Patients Before and After Septal Ablation
(A) The patient was a 56-year-old woman with a marked increase in the left ventricular outflow tract gradient. After septal ablation, there were acute decreases in tau (the time constant of myocardial relaxation), minimum left ventricular pressure, and left atrial pressure. (B) Similarly, in this 62-year-old man with a left ventricular outflow tract gradient of 113 mm Hg, septal ablation resulted improvement in myocardial relaxation and left atrial pressure. (C and D) Two patients (a 71-year-old man and a 67-year-old man, respectively) who had relatively lower left ventricular outflow tract gradients. Septal ablation resulted in acute prolongation of tau and elevation in ventricular filling pressures in both of these patients. LAP = left arterial pressure; LV-MIN = minimum left ventricular diastolic pressure; other abbreviations as in Figure 1.
|
