title: [Cardiac contractile frequency in submariners].
mesh_terms: D004562:Electrocardiography; D006321:Heart / Q000502:physiology*; D006339:Heart Rate; D006801:Humans; D005082:Physical Exertion; D012146:Rest; D013366:Submarine Medicine; D013997:Time Factors
vernacular_title: Chastota serdechnykh sokrashcheniĭ u podvodnikov