Clinical assessment of heart chamber size and valve motion during cardiopulmonary resuscitation by two-dimensional echocardiography.

摘要: It has been generally accepted that enhanced blood flow during closed-chest CPR is generated from compression of the heart between sternum and spine. To visualize massage, we performed two-dimensional echocardiography (2DE) resuscitation efforts in four patients who had cardiac arrest. 2DE analysis showed (1) LV internal dimensions did not change appreciably with chest compression; (2) mitral aortic valves were open simultaneously phase; (3) into right heart, as evidenced by saline bubble contrast, occurred relaxation (4) ventricle LA varying amounts all patients. We conclude stroke volume does result LV. Rather, CPR-induced improved cardiocirculatory dynamics appear to be principally changes intrathoracic pressure created sternal compression.