Cardiopulmonary Bypass impairs Left Ventricular Function determined by Conductance Catheter Measurement
| Autor: | G. Wimmer-Greinecker, Paul Kessler, Ulf Abdel-Rahman, Tayfun Aybek, Sait Mesut Dogan, Stephan Mierdl, Anton Moritz, Kahn Mf |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Pulmonary and Respiratory Medicine
Cardiac Catheterization medicine.medical_specialty Swine Ischemia law.invention Contractility Ventricular Dysfunction Left law Internal medicine Ventricular Pressure Cardiopulmonary bypass Animals Medicine Weaning Postoperative Period Conductance catheter Cardiopulmonary Bypass Ventricular function business.industry Hemodynamics medicine.disease Myocardial Contraction Elasticity Preload surgical procedures operative medicine.anatomical_structure Anesthesia Models Animal Vascular resistance Cardiology Surgery Cardiology and Cardiovascular Medicine business circulatory and respiratory physiology |
| Zdroj: | The Thoracic and Cardiovascular Surgeon. 51:301-305 |
| ISSN: | 1439-1902 0171-6425 |
| DOI: | 10.1055/s-2003-45427 |
| Popis: | OBJECTIVE Postoperative cardiac depression is attributed to ischemia and the effects of cardiopulmonary bypass (CPB). To evaluate the effect of CPB alone on postoperative left ventricular (LV) dysfunction, we used a conductance catheter to determine the LV performance by pressure-volume relation before and after CPB. METHODS Twenty-two 3-week-old piglets underwent sternotomy and normothermic CPB for one hour. A conductance catheter was placed in the LV cavity. End-systolic pressure-volume relationships (ESPVR), left ventricular end-diastolic pressure (LVEDP) and systemic vascular resistance (SVR) were measured under steady-state conditions before and 15 min after weaning from CPB in group A (n = 11). Group B included 11 piglets without CPB and served as control. RESULTS There was no difference between groups before initiating CPB. As an indication of depressed LV function, the ESPVR slope (mmHg/ml) was significantly lower in group A after weaning from CPB than in group B (1.69 +/- 0.5 vs. 1.86 +/- 0.55; p = 0.008). In group A, peak dP/dt (max index) (mmHg/s/m (2)) decreased markedly (1596 +/- 339 vs. 2045 +/- 206; p = 0.03), while LVEDP (mmHg) was significantly increased (11.7 +/- 2.6 vs. 5.4 +/- 0.9; p < 0.0001). In addition, SVR (index) (dyn x s x cm (-5)/m (2)) in group A was significantly lower (1407 +/- 176 vs. 1677 +/- 313; p < 0.0001) than in group B. CONCLUSION Using the very sensitive conductance catheter technique in a pig model, we could show that CPB leads to a significant depression of LV contractility and elastance even without ischemic arrest. |
| Databáze: | OpenAIRE |
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