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Hemodynamic Effects of the ECP Device with Positive-Negative Pressure 2013-1-23


Professor Sun Jichun  The second Affiliated Hospital of Xi’an Medical University

[Abstract]

This study was designed to evaluate the hemodynamic effects of External Counter Pulsation Device (ECP) with positive-negative pressure. 23 patients, were divided into two groups. A Group in 9 cases, were treated by ECP device with positive-negative pressure; B group (control group) in 14cases, were treated by ECP device with positive pressure only. Both groups were monitored with left anf right cardiac catheterization.  

[Result](1)At 60th minute of counter-pulsation (CP), the aortic systolic pressure (AOSP), compared with that before CP, in both two groups, were reduced. But the A group was reduced by 25.6mmHg(statistic mean value), and the B group was reduced by 5.87mmHg, The differece was striking. (2)The aortic diastolic pressure (AODP), compared with that before CP, were increased all about 30mmHg during the whole diastolic phase, But the latest diastolic phase(at the moment before the systolic phase), the latest diastolic pressure of A group, compared with that before CP, was reduced by 1.22mmHg (because at that instant before the systolic phase, the balloons were in the negative pressure); nevertheless, the B group was increased by 7.61mmHg (before at the same time, the balloons of B group were in the positive pressure), the difference was also striking. (3)The counter currectpressure, pulmonary arterial pressure, pulmonary arterial wedged pressure and central venous pressure (of A group), compared with B group, were no significant changes.

This study confirmed that, The Hemodynamic effect of the ECP device with positive-negative pressure balloons excels the effect of the device with only positive pressure balloons. Because the changes of AOSP and the latest diastolic pressure (A group) all excels that of the B group. And that is to say, the resistances of left ventricular ejection of A group, before and after the start of the left ventricular ejection, are all lower than that before CP; which is of great benefit to the improvement of the left ventricular function.    

Professor Sun Jichuan   National Experts with Outstanding Contributions,  State Council Special Allowance      The Chairman of Second Session of China ECP Committee

 
 

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