title: [Electrocardiographic changes in long-lived persons from Smolyan District].
mesh_terms: D000368:Aged; D001145:Arrhythmias, Cardiac / Q000453:epidemiology / Q000503:physiopathology; D002031:Bulgaria; D004562:Electrocardiography; D005260:Female; D006801:Humans; D008136:Longevity; D008297:Male
vernacular_title: Vurkhu elektrokardiografskite promeni pri dulgoletnishtite ot Smolianski okrug.