Objective To evaluate the effects of rest heart rate (RHR) on myocardial tissue velocity in healthy subjects by quantitative tissue velocity imaging (QTVI).
目的应用定量组织速度成像(QTVI)技术探讨正常人的静息心率(RHR)对心肌组织速度的影响。
The rest of its energy is used for controlling other activities—both unconscious activities, such as heart rate, and conscious ones, such as driving a car.
剩余的能量用于控制其它的活动---既包括无意识活动，比如心跳，也包括有意识活动，比如开车。
CONCLUSION: Exercises can improve obviously heart rate variability in rest, increase tone of cardiac vagus nerve and decrease the capability of cardiac sudden death.
结论：运动训练可明显提高安静时心率变异性，提高心迷走神经张力，减低心脏性猝死的可能性。
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