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采用经颈动脉插入导管的方法，在麻醉不开胸条件下，测试了３组（正常对照组，游泳训练组和力竭游泳组）共６１只ＳＤ大鼠心肌收缩成分缩短加速度（ａ_（ＣＥ））。结果表明：（１）ａ_（ＣＥ）类指标对正性变力和负性变力因素干预敏感性高，并与心率和舒张期室内最低压无相关性，证明了ａ_（ＣＥ）是评价心肌收缩性能敏感可靠参数之一；（２）经７周游泳训练后，大鼠心肌ａ_（ＣＥ）类指标值明显提高。力竭游泳后，ａ_（ＣＥ）指标值明显降低。展现出ａ_（ＣＥ）在运动性心脏心肌收缩性的研究中有良好的应用前景。
A total of 61 SD rats (control group, swimming training group and exhaustive swimming group) were used to test the systolic acceleration (a_ (CE) )). The results showed that: (1) a_ (CE) index had high sensitivity to positive and negative variables, and had no correlation with the lowest pressure in heart rate and diastole. It was proved that a_ (CE) (2) After a seven-week swimming training, the a_ (CE) index of myocardium in rats significantly increased. Exhausted swimming, a_ (CE) index was significantly reduced. It shows that a_ (CE) has a good application prospect in the study of myocardial contractility of exercise heart.