Hemodynamic Effects of Pericardial Tamponade
| Autor: | Shu Chien, Robert J. Dellenback, Robert T. Potter, Magnus I. Gregersen, Shunichi Usami |
|---|---|
| Rok vydání: | 1966 |
| Předmět: |
Cardiac output
Baroreceptor chemistry.chemical_element Blood Pressure Oxygen Pericardial Effusion General Biochemistry Genetics and Molecular Biology Dogs Oxygen Consumption Heart rate Pressure Animals Medicine Cardiac Output Blood Volume business.industry Hemodynamics Blood Proteins Blood flow Cardiac Tamponade Blood pressure Hematocrit chemistry Anesthesia Tamponade business Venous return curve |
| Zdroj: | Experimental Biology and Medicine. 123:623-627 |
| ISSN: | 1535-3699 1535-3702 |
| DOI: | 10.3181/00379727-123-31562 |
| Popis: | Discussion and conclusionsThe increase in pericardial and central venous pressures is sufficient to impede venous return to the right atrium and thereby produces a striking drop in cardiac output (Fig. 2). In addition there is a moderate reduction in heart rate during the first 15 minutes of the tamponade (Fig. 2), which also contributes to the reduction in cardiac output. Despite the increase in total peripheral resistance, the reduced blood flow results in an immediate and marked drop in arterial pressure. This decrease activates the baroreceptor mechanisms producing an increase in heart rate which eventually exceeds the control values. The oxygen consumption drops initially because of the reduced blood flow but recovers during the course of the experiment almost to the control value. Since the recovery of oxygen consumption was greater than that of the cardiac output, the oxygen extraction from the blood must have increased, especially in the constant pressure experiments. Coincident with the onset of ... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|