Systolic time intervals in intratracheal cardiogram.
D000293:Adolescent; D000328:Adult; D000368:Aged; D004562:Electrocardiography; D006334:Heart Function Tests / Q000379:methods*; D006801:Humans; D007442:Intubation, Intratracheal; D008875:Middle Aged; D009200:Myocardial Contraction; D013599:Systole; D013997:Time Factors; D014160:Transducers, Pressure