Baroreflex Sensitivity Is Impaired in Patients with Obstructive Jaundice
| Autor: | Yun-fei Cao, Zhi-Qiang Liu, Yuming Sun, Xue-wu Xu, Yan-hu Ge, Shao-li Song, Weifeng Yu, Liqun Yang, Jian-gang Song |
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| Rok vydání: | 2009 |
| Předmět: |
Male
Nitroprusside Aging medicine.medical_specialty Vasodilator Agents Hemodynamics Baroreflex Autonomic Nervous System Body Temperature Sepsis Electrocardiography Phenylephrine Atrial natriuretic peptide Internal medicine medicine Humans Vasoconstrictor Agents Aged business.industry Bilirubin Perioperative Middle Aged Jaundice medicine.disease Jaundice Obstructive Anesthesiology and Pain Medicine Shock (circulatory) Anesthesia Cardiology Female medicine.symptom business Atrial Natriuretic Factor Homeostasis |
| Zdroj: | Anesthesiology. 111:561-565 |
| ISSN: | 0003-3022 |
| DOI: | 10.1097/aln.0b013e3181adf49f |
| Popis: | Background Obstructive jaundice is associated with enhanced susceptibility to hypotensive shock, renal failure, and toxic effects of endotoxin, which results in high perioperative morbidity and mortality. Since the normal arterial baroreflex function is necessary for hemodynamic homeostasis and improving survival in sepsis, this study aimed to determine whether baroreflex sensitivity was impaired in jaundiced patients. Methods Thirty-five patients with obstructive jaundice scheduled for surgery were included, and 30 nonjaundiced patients served as controls. A modified Oxford pharmacologic technique was used for evaluating baroreflex sensitivity immediately before the surgery. Potential factors that may affect baroreflex sensitivity in jaundice, such as liver biochemistry, plasma concentrations of methionine-enkephalin, atrial natriuretic peptide and nitrate, were also measured. Results Patients with obstructive jaundice had decreased sensitivity in both the sympathetic and vagal components of the baroreflex, as compared with the controls (P < 0.01). There was a significant inverse correlation between plasma atrial natriuretic peptide concentration and decreased sympathetic baroreflex sensitivity in the jaundiced group (r = -0.44, P = 0.008). Conclusions Baroreflex sensitivity is impaired in patients with obstructive jaundice, which may contribute to their enhanced susceptibility to the well-known perioperative complications. The underlying mechanisms for such a change may be associated with an increased level of plasma atrial natriuretic peptide. |
| Databáze: | OpenAIRE |
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