Cardiac mass and left ventricular function in a sample of the Brazilian population: candidate genes / Massa cardíaca e função do ventrículo esquerdo em amostra da população brasileira: genes candidatos

AUTOR(ES)

Lilian Claudia Souza Angelo

DATA DE PUBLICAÇÃO

2006

RESUMO

Introduction: Left ventricular hypertrophy is an important risk factor for cardiovascular morbidity and mortality. Its association with the reninangiotensin system genetic variants is controversial. Objectives: To assess the association between left ventricular mass, left ventricle systolic and diastolic functions, and polymorphisms of the insertion/deletion angiotensin converting enzyme and M235T angiotensinogen genes. Methods: Observational study in adults from Vitoria (Brazil) using the methodology of the Monica project of the World Health Organization. We performed clinical examination, anthropometric assessment, laboratory analysis and transthoracic echocargiography studies in 652 adults who were previously genotyped for polymorphisms of the angiotensin-converting enzyme and angiotensinogen. We measured left ventricular mass indexed to body surface area and height 2,13, left ventricular ejection fraction, and diastolic function using mitral flow and tissue Doppler. Left ventricle was classified into following geometric patterns: normal, concentric remodeling, concentric hypertrophy and eccentric hypertrophy. Left ventricular systolic function was assessed by ejection fraction by analysis of the M-mode echocardiogram. Diastolic function was assessed using mitral flow (E wave, A wave, E/A ratio, deceleration time and isovolumic relaxation time), and Doppler tissue imaging (mitral annulus velocity in septal and lateral region: E` and A` waves, and E/E`ratio). Results: Mean age of the studied population was 51±10 years; 59% of the subjects were women and 20,8% were obese. Forty seven percent of the individuals were classified as hypertensive. Hypertension was not associated with any of the studied genotypes. Univarate analysis showed no correlation between polymorphisms of the insertion/deletion angiotensin-converting enzyme and M235T angiotensinogen gene variants, left ventricular mass index, left ventricular geometric patterns, and systolic and diastolic functions. Taking together these data indicated no evidence for the association of ACE and angiotensinogen gene variants with cardiac mass and function assessed by echocardiography.

ASSUNTO(S)

miocárdio polimorfismo (genética) polimorphism (genetics) angiotensina heart ventricles ventrículo cardíaco myocardium angiotens cardiomegaly. cardiomegalia

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