title: [A simplified method in measuring systolic time intervals].
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009200:Myocardial Contraction; D012044:Regression Analysis; D012737:Sex Factors; D013599:Systole