title: Elevation of arterial blood pressure in the squirrel monkey at 10 degrees C.
abstract: Systemic arterial blood pressure, heart rate, and total body oxygen consumption were measured in seven unanesthetized squirrel monkeys exposed to ambient temperatures of 28 degrees C and 10 degrees C. At 28 degrees C, subjects sat quietly, the average mean arterial blood pressure was 116 +/- 16 (mean +/- SD, n - 7) mmHg, heart rate was 274 +/- 31 beats/min, and oxygen consumption was 14 +/- 1.4 ml/kg-min. At 10 degrees C, the animals shivered vigorously, the average mean arterial blood pressure was 139 +/- 16 mmHg, heart rate was 328 +/- 18 beats/min, and oxygen consumption was 31.6 +/- 3.9 ml/kg-min. Thus, the oxygen consumption more than doubled, the blood pressure rose by approximately 21%, and the heart rate by approximately 20%. Elevations in heart rate as well as systemic mean arterial blood pressure during exposure to low ambient temperature were probably mediated by sympathetic-adrenal discharges as well as by activity of skeletal muscles.
mesh_terms: D000818:Animals; D001794:Blood Pressure; D001831:Body Temperature; D001833:Body Temperature Regulation; D003080:Cold Temperature; D000882:Haplorhini; D006339:Heart Rate; D008297:Male; D010101:Oxygen Consumption; D012039:Regional Blood Flow; D012453:Saimiri; D012867:Skin / Q000098:blood supply; D012879:Skin Physiological Phenomena