Experimental Physiology
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Experimental Physiology 78.4 pp 549-552
© The Physiological Society 1993
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Experimental Physiology, Vol 78, Issue 4, 549-552
Copyright © 1993 by The Physiological Society

Article

Cardiac sympathetic nerve stimulation enhances cardiovascular performance during hyperkalaemia in the anaesthetized pig

M O'Neill, KL Dorrington, and DJ Paterson

A rapid increase in arterial plasma potassium concentration to values seen during intense exercise depresses cardiac function at rest. Increasing the cardiac concentration of noradrenaline by right-sided sympathetic stimulation in eleven anaesthetized pigs significantly augmented cardiovascular performance during hyperkalaemia, while electrical pacing of the right atrium at equivalent rates to sympathetic stimulation afforded no protection against the deleterious effects of hyperkalaemia. We conclude that the inotropic effect of sympathetic activation may be important in sustaining cardiac function during exercise-induced hyperkalaemia.


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O. M. Sejersted and G. Sjogaard
Dynamics and Consequences of Potassium Shifts in Skeletal Muscle and Heart During Exercise
Physiol Rev, October 1, 2000; 80(4): 1411 - 1481.
[Abstract] [Full Text] [PDF]


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Copyright © 1993 by the The Physiological Society.