Echocardiography-guided XXXX septal reduction for @entity1121 .

@entity1 @entity452 @entity908 @entity2318 @entity1121 @entity1068 @entity616
BACKGROUND: Left ventricular outflow tract (LVOT) obstruction is frequently responsible for symptoms in @entity1121 ( @entity1121 ). Medical therapy is often not sufficient to control these symptoms, and surgical myotomy-myomectomy is required. METHODS AND RESULTS: We enrolled 33 symptomatic @entity1 with @entity1121 and obstruction (>/=40 mm Hg gradient at rest or >/=60 mm Hg @entity452 -provoked). By contrast echocardiography, the bulging septum was localized and infarcted by injection of 2 to 5 mL of absolute @entity1068 into the septal artery(ies) supplying the hypertrophied area. Baseline echocardiograms with Doppler, myocardial perfusion tomograms, and treadmill exercise or pharmacological testing were compared with those at 6 weeks and 6 months. The mean rise in @entity908 kinase was 1964+/-796 U. All @entity1 experienced symptomatic relief; NYHA class decreased from 3. 0+/-0.5 to 0.9+/-0.6 (P<0.001). Exercise time increased from 286+/-193 to 421+/-181 seconds (P=0.03). The resting and @entity452 -provoked gradient decreased from 49+/-33 and 96+/-34 mm Hg to 9+/-19 (P<0.001) and 24+/-31 mm Hg (P<0.001), respectively. Echocardiograms repeated at 6 weeks after the procedure showed a 28% reduction in septal thickness and 17% reduction in left ventricular mass. Myocardial perfusion imaging showed a "septal amputation pattern," with @entity2318 in the upper and middle septal areas. Complete @entity616 developed in 11 @entity1 , who then required permanent pacemaker implantation. CONCLUSIONS: Echocardiography-guided @entity1068 septal reduction in @entity1 with @entity1121 is a safe, minimally invasive procedure that provides symptomatic relief with improved hemodynamic and left ventricular parameters.
