alexa Prevention of cardiac arrhythmias by adaptation to hypoxia: regulatory mechanisms and cardiotropic effect.
Cardiology

Cardiology

Journal of Clinical & Experimental Cardiology

Author(s): Meerson FZ, Ustinova EE, Manukhina EB, Meerson FZ, Ustinova EE, Manukhina EB

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Abstract Adaptation to intermittent hypoxia had a pronounced antiarrhythmic effect in acute myocardial ischemia in conscious animals. This effect was less pronounced in anesthesia and was absent in isolated heart. In reperfusion, the prophylactic effect of adaptation was equally pronounced in all cases. Adaptation prevented stress-induced exhaustion of brain beta-endorphine presumably by its accumulation in adrenal glands and resulted in the accumulation of dopamine, 5-hydroxytryptamine and 5-hydroxyindolacetic acid in brain structures. These data naturally lead to the assumption that central mechanisms play the main role in the antiarrhythmic effect of adaptation to intermittent hypoxia on ischemic arrhythmias, while mechanisms occurring at the level of heart play the main role in the protective effect of the same adaptation against reperfusion arrhythmias.
This article was published in Biomed Biochim Acta and referenced in Journal of Clinical & Experimental Cardiology

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