Effect of posture on heart rate and cardiac axis of mice.
Indian J Physiol Pharmacol
; 1987 Jul-Sep; 31(3): 211-7
Article
in En
| IMSEAR
| ID: sea-106525
ABSTRACT
Effect of change in body posture on cardiac electrical axis has not been well documented. Hence the present work was undertaken to study the effect of passive head-up and head-down postures on ventricular QRS axis and heart rate of anesthetised mice. During head-up posture, there was a statistically significant (P less than 0.02) increase in heart rate whereas during head-down posture, the heart rate decreased insignificantly. These changes in heart rate can be explained on the basis of synus and aortic nerve mediated baroreceptor reflexes. Ventricular QRS axis showed a significant increase (P less than 0.02) during head-up posture and an insignificant decrease during head-down posture. A change in the posture is likely to produce a change in anatomical orientation of heart within the thorax resulting in alteration of electrical axis of the heart.
Full text:
1
Index:
IMSEAR
Main subject:
Posture
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Rats
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Electrocardiography
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Heart Rate
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Anesthesia
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Animals
/
Mice
Language:
En
Journal:
Indian J Physiol Pharmacol
Year:
1987
Type:
Article