PMID: 10078809Mar 17, 1999Paper

The physiological response to norepinephrine during hypothermia and rewarming

Resuscitation
S J WeissH L Lippton

Abstract

Our purpose was to determine if core hypothermia influences physiological responses to norepinephrine (NE); and if rewarming reverses these effects. Animals were instrumented to measure mean arterial pressure (MAP) and cardiac output (CO). Core temperature was manipulated from 37.5 degrees C (normothermia), to 30 degrees C (hypothermia) and the back to 37.5 degrees C (rewarming) using an external arterial-venous femoral shunt. At each of these temperatures, baseline CO and MAP were measured. Norepinephrine (NE) was infused at rates to deliver 0.2, 1.0, or 5 microg kg(-1) per h. At each dose CO and MAP was measured again. Systemic vascular resistance (SVR) was calculated using the formula (SVR = (MAP/CO) x 80). Eight animals underwent all three phases of the protocol. The response to NE during normothermia was a significant increase in MAP to doses of 1 microg kg(-1) per min (P < 0.01) and 5 microg kg(-1) per min (P < 0.01) and SVR to doses of 1 microg kg(-1) per min (P < 0.01) and 5 microg kg(-1) per min (P < 0.01). The response to NE during hypothermia was a significant increase in MAP only at doses of 1 microg kg(-1) per min (P = 0.03) and 5 microg kg(-1) per min (P = 0.01). The response to NE after rewarming was a significan...Continue Reading

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Citations

Nov 28, 2002·Current Opinion in Critical Care·Joost J L M BierensHarry P M M Gelissen
Jan 13, 2009·Annals of Cardiac Anaesthesia·Mukesh TripathiKailash Chandra Pant
May 28, 2015·The Veterinary Clinics of North America. Small Animal Practice·Stuart Clark-Price
Oct 8, 2005·Journal of Applied Physiology·T V KondratievT Tveita
Dec 7, 2016·Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine·Erik Sveberg DietrichsTorkjel Tveita

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