title: Clinical comparison of indirectly and directly determined sinoatrial conduction time.
mesh_terms: D004562:Electrocardiography / Q000379:methods; D005260:Female; D006329:Heart Conduction System / Q000502:physiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D012849:Sinoatrial Node / Q000502:physiology*; D013997:Time Factors