Abstract
Myocardial electrical activity was studied in divers at rest and during physical exertion of varied intensity at normal pressure and during exposure for 1 week to a pressure of 5 atm N2+O2. At rest and during work of equal power, under hyperbaric conditions the heart rate was slower than at 1 atm, although its increase during work was greater than at 1 atm. During work under increased pressure there was a more marked increase in amplitude of the P wave, possibly due to increased resistance in the pulmonary circulation under hyperbaric conditions; the amplitude of the T wave was reduced and the S-T interval depressed. Some divers showed signs of impairment of metabolic processes in the myocardium and disturbances of its automatic activity and conductivity.
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Evstropova, G.N. Effect of prolonged exposure to hyperbaric conditions on myocardial electrical activity at rest and during work. Bull Exp Biol Med 84, 1223–1226 (1977). https://doi.org/10.1007/BF00805866
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DOI: https://doi.org/10.1007/BF00805866