Association between the polymorphism of A9570G in angiotensin I converting enzyme 2 gene and cardiac dysfunction and ventricular remodeling after myocardial infarction / 中国医师杂志

ABSTRACT

Objective To determine the effects of polymorphism of A9570G in angiotensin I converting enzyme 2 gene ( ACE2) gene on cardiac dysfunction and ventricular remodeling after myocardial infarction. Methods 252 patients with old myccardial infarction were included in this study. They were classified according to their polymorphisms of ACE 2 gene analyzed by polymerase chain reaction (PCR) and restriction fragment length polymorphism (RFLP). Echocardiograms were used to determine left ventricular end diastolic diameters (LVEDd) , Left ventricular mass index (LVMI) , mitral flow pattern early diastolic and late diastolic peak flow ratio (E/A) and left ventricular ejection fraction ( LVEF). Results In male, LVEDd, LVMI, and LVEF had significant difference among ACE2 genotypes ( t = 2. 609,3.527and 2.063, P =0.010,0.001 and 0.041), and no significant differences in E/A( t =0.689,P =0.492). In female,LVEDd, LVMI, E/A and LVEF had no significant difference among ACE2 genotypes( F =0. 848, 0.077,0. 985 and 1.611, P = 0. 432,0. 926,0. 377 and 0. 205 ). Conclusion The polymorphism of A9570G in ACE2 gene may be associated with cardiac dysfunction and ventricular remodeling after myocardial infarction in male. ACE 2 gene polymorphism may be a genetic factor on cardiac dysfunction and ventricular remodeling after myocardial infarction.