Heart rate and metabolism

The correlation between heart rate and oxygen consumption or heat production was sometimes used as an indirect approach to metabolic rates after corresponding calibration. Smaller animals like rodents (e.g. squirrels, rats, mice, hamster 

Most of the animals cited in this review are too small to apply this heart rate technique. But heart beat can be measured by other methods in small invertebrates so that this approach might stimulate the fantasy of some calorimetrists for further investigations. 

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Chabot, D., Gagnon, P., and Dixon, E. A. (1996). Effect of predator odors on heart rate and metabolic rate of wapiti [Cervus elaphus canadensis). Journal ofChemicalEcology 22,839. 

SAFETY PROFILE Human poison by inhalation and intravenous routes. Experimental poison by ingesdon, intraperitoneal, and intravenous routes. Human systemic effects increased intracranial pressure, general anesthesia, change in heart rate, and metabolic acidosis. An experimental teratogen. Used as a vasodilator for short-term treatment of severe hypertension. Mixmres with sodium nitrite explode when heated. When heated to decomposidon it emits toxic fumes of NOx, CN , and Na20. 

Whales reduce heart rate and metabolism when underwater. 

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