In Salyut-5 crewmembers, electrocardiograms were recorded in 12 standard and D--S leads. No marked changes in bioelectric properties of the myocardium were detected. However, during the second part of the mission B. V. Bolynov and V. M. Zholobov showed changes in the terminal portion of the ventricular complex in the left sternal leads. It is presumed that they were induced by repolarization anomalies due to neurohormonal effects on myocardial metabolism. Members of the second crew did not exhibit similar electrocardiographic changes.
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