Clinical and echocardiographic determinants of long-term survival after surgical myectomy in obstructive hypertrophic cardiomyopathy.
Circulation
; 111(16): 2033-41, 2005 Apr 26.
Article
em En
| MEDLINE
| ID: mdl-15824202
ABSTRACT
BACKGROUND:
Surgical myectomy has been the standard treatment for patients with drug-refractory obstructive hypertrophic cardiomyopathy. The clinical and echocardiographic predictors of long-term survival and freedom from cardiovascular morbidity after myectomy have been unclear. METHODS ANDRESULTS:
We studied a consecutive cohort of 338 adult patients (age at operation 47+/-14 [range 18 to 77] years, 60% male) who underwent myectomy at our institution. Preoperative resting left ventricular outflow tract (LVOT) gradient was 66+/-32 mm Hg (range 5 to 158 mm Hg). Early postoperative mortality was 1.5% (5 deaths) 4 deaths occurred between 1978 and 1992, and 1 death occurred between 1993 and 2002. During long-term follow-up, 83% of patients reported an improvement to functional class I or II. The majority of patients (98%) had no resting LVOT gradient. Long-term survival was excellent, with 98+/-1% survival at 1 year, 95+/-1% at 5 years, and 83+/-3% at 10 years after myectomy. Multivariable Cox regression analysis identified 5 predictors of overall mortality (1) age > or =50 years at surgery (hazard ratio [HR] 2.8, 95% CI 1.5 to 5.1, P=0.001), (2) female gender (HR 2.5, 95% CI 1.5 to 4.3, P=0.0009), (3) history of preoperative atrial fibrillation (HR 2.2, 95% CI 1.2 to 4.0, P=0.008), (4) concomitant CABG (HR 3.7, 95% CI 1.7 to 8.2, P=0.001), and (5) preoperative left atrial diameter > or =46 mm (HR 2.9, 95% CI 1.6 to 5.4, P=0.0008). Significant predictors of late major cardiovascular events found on multivariable analysis were (1) female gender (HR 3.3, 95% CI 2.0 to 5.4, P<0.0001), (2) history of preoperative atrial fibrillation (HR 1.9, 95% CI 1.1 to 3.3, P=0.02), and (3) preoperative left atrial diameter > or =46 mm (HR 2.5, 95% CI 1.5 to 4.3, P=0.0008).CONCLUSIONS:
Myectomy provides excellent relief for LVOT obstruction in patients with hypertrophic cardiomyopathy. Preoperative clinical and echocardiographic variables can predict long-term outcome after myectomy.
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Base de dados:
MEDLINE
Assunto principal:
Cardiomiopatia Hipertrófica
/
Eletrocardiografia
Tipo de estudo:
Etiology_studies
/
Observational_studies
/
Prognostic_studies
/
Risk_factors_studies
Limite:
Adolescent
/
Adult
/
Aged
/
Female
/
Humans
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Male
/
Middle aged
Idioma:
En
Ano de publicação:
2005
Tipo de documento:
Article