title: [Changes in the frequency and rhythm of cardiac contractions under the influence of a flight load].
mesh_terms: D000293:Adolescent; D000328:Adult; D000337:Aerospace Medicine; D006339:Heart Rate; D006801:Humans; D008875:Middle Aged; D009200:Myocardial Contraction; D011674:Pulse; D012146:Rest; D013997:Time Factors; D014586:USSR
vernacular_title: Izmeneniia chastoty i ritma serdechnykh sokrashcheniĭ pod vliianiem letnoĭ nagruzki