Echocardiography-guided ethanol septal reduction for hypertrophic obstructive cardiomyopathy

Nasser M. Lakkis, Sherif Nagueh, Neal Kleiman, Donna Killip, Zuo Xiang He, Mario S. Verani, Robert Roberts, William H. Spencer

Research output: Contribution to journalArticle

202 Scopus citations

Abstract

Background - Left ventricular outflow tract (LVOT) obstruction is frequently responsible for symptoms in hypertrophic obstructive cardiomyopathy (HOCM). Medical therapy is often not sufficient to control these symptoms, and surgical myotomy-myomectomy is required. Methods and Results - We enrolled 33 symptomatic patients with HOCM and obstruction (≥40 mm Hg gradient at rest or ≥60 mm Hg dobutamine-provoked). By contrast echocardiography, the bulging septum was localized and infarcted by injection of 2 to 5 mL of absolute ethanol 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 creatine kinase was 1964±796 U. All patients 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 dobutamine-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 scarring in the upper and middle septal areas. Complete heart block developed in 11 patients, who then required permanent pacemaker implantation. Conclusions - Echocardiography-guided ethanol septal reduction in patients with HOCM is a safe, minimally invasive procedure that provides symptomatic relief with improved hemodynamic and left ventricular parameters.

Original languageEnglish (US)
Pages (from-to)1750-1755
Number of pages6
JournalCirculation
Volume98
Issue number17
DOIs
StatePublished - Oct 27 1998

Keywords

  • Cardiomyopathy
  • Contrast media
  • Echocardiography
  • Ethanol
  • Hypertrophy

ASJC Scopus subject areas

  • Physiology
  • Cardiology and Cardiovascular Medicine

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