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本文对正常者15名,不伴ST段持续性改变的心肌梗塞者12例,伴ST段改变者19例进行二维超声心动图定量分析。静息和等长握力运动中的左心室喷血分数(EF)和代表室壁活动障碍范围和程度的平均Radit值。静息时三组EF分别为0.64±0.02、0.54±0.05和0.43±0.08(P<0.01),运动中分别为0.74±0.05、0.49±0.07和0.30±0.08,与静息时比较均有显著差別(P<0.01)。静息时平均Radit值分别为0.8197、0.6734和0.5000(P<0.01),运动中心肌梗塞病人,特别是伴ST段持续性改变者的室壁活动障碍显著恶化(P<0.05),证明心肌梗塞伴ST段持续改变者,静息和运动中心功能下降和室壁活动障碍最明显。
In this paper, 15 normal subjects, 12 patients with myocardial infarction without ST-segment persistent changes and 19 patients with ST-segment changes were analyzed by two-dimensional echocardiography. Left ventricular ejection fraction (EF) at resting and isometric grip exercises and mean Radit values representing the extent and extent of ventricular wall motion disorders. The resting EF EF of the three groups were 0.64 ± 0.02, 0.54 ± 0.05 and 0.43 ± 0.08 (P <0.01), respectively, and were 0.74 ± 0.05, 0.49 ± 0.07 and 0.30 ± 0.08 respectively at rest, which were significantly different from those at rest (P <0.01). The average Radit values at rest were 0.8197, 0.6734 and 0.5000, respectively (P <0.01). The motor activity in patients with myocardial infarction, especially those with persistent changes in ST segment, was significantly worse (P <0.05), indicating that myocardial infarction Persistent with changes in ST segment who, resting and exercise center function decline and the most obvious wall activity disorders.