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Background The coronary collateral circulation has a positive effect on the ischemic myocardium. But it is limited for patients missing the time window of total occlusion of the coronary artery elective percutaneous coronary intervention(PCI). The effect of collateral circulation on left cardiac function has been less studied. Methods A total of 34 patients with one or more coronary artery occlusion who underwent coronary angiography and Rentrop’s method were divided into 2 groups:Good collateral circulation(A groups, Rentrop score 2-3, n=19) and(B groups, Rentrop score 1- 2, n=15). The improvement of left ventricular end diastolic volume(LVEDV) and left ventricular ejection fraction(LVEF) were compared between the two groups before and after PCI. Results In good collateral circulation group, left ventricular ejection fraction(LVEF) was significantly higher after PCI(P<0.05). In poor collateral circulation group, left ventricular end diastolic volume index(LVEDV) was significantly increased after PCI(P<0.05). Conclusions Good collateral circulation has a significant protective effect on left ventricular function. PCI operation can significantly improve the prognosis of patients with good collateral circulation of coronary artery occlusion.
Background The coronary collateral circulation has a positive effect on the ischemic myocardium. But it is limited for patients missing the time window of total occlusion of the coronary artery elective percutaneous coronary intervention (PCI). The effect of collateral on on left cardiac function has been less studied. Methods A total of 34 patients with one or more coronary artery occlusions who underwent coronary angiography and Rentrop’s method were divided into 2 groups: Good collateral circulation (A groups, Rentrop score 2-3, n = 19) and (B groups , Rentrop score 1- 2, n = 15). The improvement of left ventricular end diastolic volume (LVEDV) and left ventricular ejection fraction (LVEF) were compared between the two groups before and after PCI. Ventricular ejection fraction (LVEF) was significantly higher after PCI (P <0.05). In poor collateral circulation group, left ventricular end diastolic volume index (LVEDV) was significantly incr eased after PCI (P <0.05). Conclusions Good collateral circulation has a significant protective effect on left ventricular function. PCI operation can significantly improved the prognosis of patients with good collateral circulation of coronary artery occlusion.