Objective To study the effect of body position nursing on acute myocardial infarction early patients ’ heart function in CCU monitoring room .Method 98 patients with acute myocardial infarction was selected and ran-domly divided into 30°、-45° and -60° stage to stage semireclining position nursing group (short for control group) .The patients’ changing conditions of D-P、SDNN、RMSSD、QTD and QTCD in different periods was ob-served in two groups .Result Compared with control group ,observation group’s D-P obviously reduced in every dif-ferent period ,There was not significance differences between groups (P> 0 .05) .However observation group’s SDNN obviously reduced at t2 ~t3 and t3 ~t4 ,RMSSD obviously reduced at every period ,QTD and QTCD obvious-ly reduced at t0 ~t2 and t2 ~t3 ,There was significance differences(P<0 .05) .Conclusion Stage to stage semireclin-ing position nursing methods had small effect on acute myocardial infarction .Early patients’ heat electrophysiology had clinical popularization value .%目的：探讨体位护理对CCU监控室中急性心肌梗死早期患者心脏机能的影响效果。方法选择98例急性心肌梗死患者，随机分为30°、45°、60°逐级半卧位护理组（观察组），以及单纯30°半卧位护理组（对照组），观察两组患者不同时间段心肌耗氧量D-P、SDNN、RMSSD、QTd及QTcd变化情况。结果与对照组比较，观察组在各个时间段的心肌耗氧量（D-P）均降低明显，但差异无显著意义（P＞0．05）。而观察组SDNN在t2～ t3、t3～t4降低明显，RMSSD则在各个时间段均降低明显，QTd、QTcd在t0～t2、t2～t3均降低明显，差异有显著意义（P＜0．05）。结论逐级半卧位的体位护理措施对急性心肌梗死患者的心脏电生理影响较小，具有临床推广价值。
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