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Ann Thorac Surg 1987;43:428-431
© 1987 The Society of Thoracic Surgeons

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Articles

Suppression of Shivering Decreases Oxygen Consumption and Improves Hemodynamic Stability during Postoperative Rewarming

Departments of Thoracic and General Surgery, University of Michigan Hospitals, Ann Arbor, MI

Accepted for publication August 1, 1986.

^* Address reprint requests to Dr. Kirsh, Section of Thoracic Surgery, University of Michigan Hospitals, 1500 E Medical Ctr Dr, Box 0344, Ann Arbor, MI 48109

Thirty-three patients undergoing elective myocardial revascularization were prospectively randomized into two study groups (Group S and Group P) to permit evaluation of the effects of shivering on oxygen consumption per minute (VO ₂), carbon dioxide production per minute (VCO ₂), and hemodynamic performance. Group S was allowed to shiver during the postoperative rewarming period, and Group P received hourly injections of pancuronium bromide and Metubine (metocurine) sulfate with sedation to block the shivering response. Group S demonstrated significantly higher increases in VO ₂ and VCO ₂, lower systolic blood pressure and mixed venous oxygen saturation, and a greater use of inotropic support than the patients in Group P. Suppression of the shivering response minimized increases in VO ₂ and VCO ₂, improved hemodynamic stability, and resulted in a decreased need for inotropic support.

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