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Angiotensin-converting enzyme gene polymorphism and geometric patterns of hypertensive left ventricular hypertrophy.
Japanese Heart Journal 1999 September
Polymorphism in the angiotensin-converting enzyme (ACE) gene has been found to be associated with left ventricular hypertrophy (LVH) in patients with essential hypertension (EHT) in certain populations. We sought to evaluate, in a Japanese population, whether ACE genotype is related to left ventricular mass, or to the geometry of LVH in EHT. Eighty-seven patients with EHT were examined. Their relative wall thickness (RWT) and left ventricular mass index (LVMI), determined by echocardiogram, were used to divide them into 4 groups: normal (normal RWT and LVMI, n = 35); concentric remodeling (increased RWT but normal LVMI, n= 10); eccentric hypertrophy (increased LVMI but normal RWT, n = 20); and concentric hypertrophy (increased LVMI and RWT, n = 22). Genetic analysis for ACE genotypes was performed on peripheral leukocytes using PCR techniques. Interventricular septal thickness and RWT were significantly greater in the patients with the DD genotype than in those with the II genotype, but LVMI did not differ among the three ACE genotypes. The frequency of the DD genotype was higher in the concentric hypertrophy group than in each of the other groups, and the frequency of the II genotype was lower in the concentric hypertrophy group than in either the normal or eccentric hypertrophy group. The geometric pattern of hypertensive LVH was associated with ACE genotype in a Japanese population. The DD genotype may contribute to concentric hypertrophy, but not to eccentric hypertrophy.
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