Avila-Vanzzini N, Espínola-Zavaleta N, Masso-Rojas F, Varela-López E, Casanova-Garcés JM, Kury-Alfaro J, Herrera-Bello H

Language: Spanish
References: 38
Page: 39-46
PDF size: 117.76 Kb.

ABSTRACT

Dilated cardiomyopathy is a myocardial disease, characterized by biventricular expansion. Renin-angiotensin aldosterone system (RAAS) is closely related with the progress of this pathology. Has been shown that angiotensin converting enzyme (ACE) gene insertion/deletion (I/D) polymorphism influences as much in the plasmatic concentration as in activity of ACE. In addition, ACE I/D polymorphism has been associated with remodeling phenomena and an increased risk to develop several cardiovascular diseases. On virtue of the influence of ACE gene polymorphism on RAAS, we studied the correlation between ACE I/D polymorphism with morphologic and functional clinical alterations in ischemic or idiopathic dilated cardiomyopathy in one attempt to establish its utility as prognosis factor. Methods and results. We studied 30 patients of The National Institute of Cardiology. Ventricular function was evaluated by transthoracic echocardiography. ACE genotype was determined by polymerase chain reaction (PCR). Results for left ventricle shown: Tei Index was increased in patients with II genotype (0.84 vs. 0.48) when were compared to patients with DD genotype p ‹ 0.01. Eccentricity Index was lesser in the group with II genotype (0.64), than in the group DD (0.86) p ‹ 0.01. Ventricular mass was increased in DD patients when was compared with II group (174 g vs. 133 g) Isovolumetric contraction time was shorter in group DD than in II (45 mseg vs. 139 mseg) p ‹ 0.05. These findings denote better preservation of left ventricular function in patients with DD genotype. In opposition, right ventricle shown an increased Tei Index in the group with DD genotype (1.01) when was compared with II genotype (0.55), p ‹ 0.05. Pulmonary artery systolic pressure tended to be higher in DD genotype group without reach statistic significance. Conclusions. In our group of study, patients with DD genotype shown better left ventricular function in ischemic or idiopathic dilated cardiomyopathy. On the opposite right ventricular function were more deteriorated in patients with ACE DD genotype.

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