Background Blockade of cardiac sympathetic fibers by thoracic epidural anesthesia (TEA) was previously shown to reduce right and left ventricular systolic function and effective pulmonary arterial... Show moreBackground Blockade of cardiac sympathetic fibers by thoracic epidural anesthesia (TEA) was previously shown to reduce right and left ventricular systolic function and effective pulmonary arterial elastance. At conditions of constant paced heart rate, cardiac output and systemic hemodynamics were unchanged. In this study, we further investigated the effect of cardiac sympathicolysis during physical stress and increased oxygen demand.Methods In a cross-over design, 12 patients scheduled to undergo thoracic surgery performed dynamic ergometric exercise tests with and without TEA. Hemodynamics were monitored and biventricular function was measured by transthoracic two-dimensional and M-mode echocardiography, pulsed wave Doppler and tissue Doppler imaging.Results TEA attenuated systolic RV function (TV SMODIFIER LETTER PRIME: - 21%, P < 0.001) and LV function (MV SMODIFIER LETTER PRIME: - 14%, P = 0.025), but biventricular diastolic function was not affected. HR (- 11%, P < 0.001), SVI (- 15%, P = 0.006), CI (- 21%, P < 0.001) and MAP (- 12%, P < 0.001) were decreased during TEA, but SVR was not affected. Exercise resulted in significant augmentation of systolic and diastolic biventricular function. During exercise HR, SVI, CI and MAP increased (respectively, + 86%, + 19%, + 124% and + 17%, all P < 0.001), whereas SVR decreased (- 49%, P < 0.001). No significant interactions between exercise and TEA were found, except for RPP (P = 0.024) and MV E DT (P = 0.035).Conclusion Cardiac sympathetic blockade by TEA reduced LV and RV systolic function but did not significantly blunt exercise-induced increases in LV and RV function. These data indicate that additional mechanisms besides those controlled by the cardiac sympathetic nervous system are involved in the regulation of cardiac function during dynamic exercise. Show less
Epidural analgesia provided superior analgesia to remifentanil PCA. Women randomised to epidural analgesia with a request for pain relief are more satisfied with their analgesia than women... Show more Epidural analgesia provided superior analgesia to remifentanil PCA. Women randomised to epidural analgesia with a request for pain relief are more satisfied with their analgesia than women randomised to remifentanil PCA. Costs of epidural analgesia and remifentanil PCA are not significantly different. From an economic perspective, there is no preferential pain treatment in labouring women. Epidural analgesia is associated with a greater incidence of fever and significantly higher temperature overall. Patient controlled remifentanil has an effect on maternal SpO2 with significantly lower mean SpO2 during the labour period. This shows that respiratory complications are a serious problem associated with remifentanil and that continuous monitoring by trained personnel is obligatory. Persistent postpartum pain affects many women. Of surveyed women, 6.1% complained of significant pain related to delivery. Since this was a retrospective follow up study this results might be explained by the study design and these findings have to be evaluated by further research. Show less
