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目的 :研究陈旧性心肌梗塞患者不同左室收缩功能状态时肺静脉血流频谱的变化。方法 :陈旧性心肌梗塞 83例 ,根据左室射血分数 (L VEF)分为三组 :L VEF>5 0 %者 38例 ,L VEF4 0～ 5 0 %者 2 5例 ,L VEF<4 0 %者 2 0例 ;分别测定肺静脉血流频谱 S及其积分、D及其积分、AR及其积分、S/ D、AR波持续时间与 A波持续时间的比值 (ARd/ Ad) ,二尖瓣血流频谱 E及其积分、A及其积分、E/ A、EDT,左室等容舒张时间 IRT。结果 :陈旧性心肌梗塞各组 S、AR、ARd/ Ad与对照组比较 ,差异均有显著性 ,各组间 S、S/ D、AR、ARd/ Ad、IRT比较差异均有显著性。结论 :陈旧性心肌梗塞患者不同左室收缩功能状态时存在着程度不等的左室舒张功能异常 ,IRT和二尖瓣血流频谱结合肺静脉血流频谱可更全面地反映左室舒张功能
Objective: To study the change of pulmonary venous flow in patients with old myocardial infarction with different left ventricular systolic function. Methods: 83 cases of old myocardial infarction were divided into three groups according to left ventricular ejection fraction (LVEF): L VEF> 50% in 38 cases, L VEF4 0 ~ 50% in 25 cases, L VEF <4 0% of 20 cases; respectively, pulmonary venous flow spectrum S and its integral, D and its integral, AR and its integral, S / D, AR wave duration and A wave duration (ARd / Ad) Spike flow spectrum E and its integral, A and its integral, E / A, EDT, left ventricular isovolumic relaxation time IRT. Results: There were significant differences in S, AR and ARd / Ad between the old myocardial infarction group and the control group, and there was significant difference between the groups in S, S / D, AR, ARd / Ad and IRT. CONCLUSIONS: Left ventricular diastolic dysfunction exists in patients with old myocardial infarction with different degrees of left ventricular systolic dysfunction. IRT and mitral flow spectrum in combination with pulmonary venous flow spectrum can more fully reflect left ventricular diastolic function