| Autor: |
Guerci, Alan D., Halperin, Henry R., Beyar, Rafael, Beattie, Charles, Tsitlik, Joshua E., Wurmb, Edward C., Chandra, Nisha C., Weisfeldt, Myron L. |
| Zdroj: |
Journal of the American College of Cardiology; September 1989, Vol. 14 Issue: 3 p790-798, 9p |
| Abstrakt: |
Aortic flow and pressure relations and aortic diameter were examined during sinus rhythm, internal cardiac massage, vest cardiopulmonary resuscitation, conventional manual cardiopulmonary resuscitation and high impulse manual cardiopulmonary resuscitation in 14 anesthetized large dogs. During sinus rhythm and during internal cardiac massage, ascending aortic flow and pressure increased simultaneously and the rise in ascending aorta pressure preceded the rise in descending aortic pressure by (mean ± SEM) 28 ± 4 and 30 ± 1 ms, respectively. In contrast, during vest, conventional and high impulse cardiopulmonary resuscitation, ascending aortic flow lagged behind the initial rise in aortic pressure by 40 ± 4 to 46 ± 4 ms and ascending and descending aortic pressure increased simultaneously (p < 0.001 for each external compression mode versus sinus rhythm and internal massage). The ratio of pulse pressure to stroke volume increased by an order of magnitude during all modes of external chest compression (p < 0.001 versus sinus rhythm and internal massage) and aortic diameter decreased during vest and high impulse cardiopulmonary resuscitation (p < 0.05 versus sinus rhythm and internal massage). |
| Databáze: |
Supplemental Index |
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