BACKGROUND: Hypertrophic obstructive cardiomyopathy (HOCM) is characterized by left ventricular hypertrophy (LVH) in the absence of increased external load. Recently, nonsurgical septal reduction therapy (NSRT) with intracoronary ethanol has been introduced to treat severely symptomatic patients with outflow tract obstruction. Its long-term effects on LV mass, however, are unknown. METHODS AND RESULTS: The LV size, function, and outflow tract gradient of 26 HOCM patients (53+/-15 years old) who underwent NSRT were assessed by echocardiography at baseline and 1 and 2 years after the procedure. LVH was evaluated by wall thickness of individual myocardial segments, planimetered myocardial area, and mass. The outflow gradient decreased from 36+/-6 mm Hg before NSRT to 0+/-3 mm Hg at 2 years (P<0.001), with patients experiencing symptomatic improvement (P<0.05). LV end-diastolic and end-systolic dimensions increased significantly at both 1 and 2 years (P<0.001). All parameters of LVH showed evidence of regression. LV mass decreased (301+/-78 g at baseline, 223+/-5 g at 1 year, and 190+/-58 g at 2 years; P<0.01), with the 2-year reduction in mass related to infarct size and the acute reduction in outflow tract gradient (r=0.48, P<0.05 and r=0.63, P<0.01, respectively). CONCLUSIONS: NSRT results in LV remodeling that is characterized by an increase in LV size and a decrease in the extent of LVH.
BACKGROUND:Hypertrophic obstructive cardiomyopathy (HOCM) is characterized by left ventricular hypertrophy (LVH) in the absence of increased external load. Recently, nonsurgical septal reduction therapy (NSRT) with intracoronary ethanol has been introduced to treat severely symptomatic patients with outflow tract obstruction. Its long-term effects on LV mass, however, are unknown. METHODS AND RESULTS: The LV size, function, and outflow tract gradient of 26 HOCM patients (53+/-15 years old) who underwent NSRT were assessed by echocardiography at baseline and 1 and 2 years after the procedure. LVH was evaluated by wall thickness of individual myocardial segments, planimetered myocardial area, and mass. The outflow gradient decreased from 36+/-6 mm Hg before NSRT to 0+/-3 mm Hg at 2 years (P<0.001), with patients experiencing symptomatic improvement (P<0.05). LV end-diastolic and end-systolic dimensions increased significantly at both 1 and 2 years (P<0.001). All parameters of LVH showed evidence of regression. LV mass decreased (301+/-78 g at baseline, 223+/-5 g at 1 year, and 190+/-58 g at 2 years; P<0.01), with the 2-year reduction in mass related to infarct size and the acute reduction in outflow tract gradient (r=0.48, P<0.05 and r=0.63, P<0.01, respectively). CONCLUSIONS: NSRT results in LV remodeling that is characterized by an increase in LV size and a decrease in the extent of LVH.
Authors: Marco Canepa; Lars L Sorensen; Iraklis Pozios; Veronica L Dimaano; Hong-Chang Luo; Aurelio C Pinheiro; James B Strait; Claudio Brunelli; M Roselle Abraham; Luigi Ferrucci; Theodore P Abraham Journal: Am J Cardiol Date: 2013-10-15 Impact factor: 2.778
Authors: Christian Sohns; Samuel Sossalla; Jan D Schmitto; Claudius Jacobshagen; Björn W Raab; Silvia Obenauer; Lars S Maier Journal: Clin Res Cardiol Date: 2010-02-21 Impact factor: 5.460
Authors: Jan Krejci; Pavel Gregor; David Zemanek; Klaudia Vyskocilova; Karol Curila; Radka Stepanova; Miroslav Novak; Ladislav Groch; Josef Veselka Journal: ScientificWorldJournal Date: 2013-11-11