Effects of submaximal exercise and hyperventilation on ECG components in healthy, young adult men with recording leads typically used for evaluation of ischemic heart disease

dc.contributor.authorGallagher, Libby A.en
dc.contributor.committeechairHerbert, William G.en
dc.contributor.committeememberSebolt, Don R.en
dc.contributor.committeememberHumphrey, Reed H.en
dc.contributor.departmentEducationen
dc.date.accessioned2014-03-14T21:34:29Zen
dc.date.adate2009-04-25en
dc.date.available2014-03-14T21:34:29Zen
dc.date.issued1995-05-01en
dc.date.rdate2009-04-25en
dc.date.sdate2009-04-25en
dc.description.abstractThe present study was undertaken to determine if leads CM₅, CC₅, and V₅ are equally sensitive in detecting ST segment depression with exercise or hyperventilation in apparently normal males. Seven physically active men (29.4 + 2.9 yrs, 180.9 + 2.5 cm, 77.9 + 3.4 kg, x±SEM), free of risk factors for heart disease, were initially found to have J point (J₀) depression with mild exercise in lead V₅. Simultaneous ECG recordings from CM₅, CC₅ and V₅ during seated rest (REST), immediately post-moderate exercise (IPE), and after 30 s of hyperventilation (HVT). ECG signals were manually evaluated for ST segment depression at the J point and 60 ms and 80 ms past the J point (J₆₀, J₈₀). None of the three leads differed in their ability to detect ST segment changes. With exercise, J₀ was significantly (P<.05) reduced compared to REST; neither J₆₀ nor J₈₀ differed from REST. HVT reduced J₀ significantly but not J₆₀ or J₈₀ Exercise provoked greater reductions than HVT. These data suggest that, in apparently healthy adult males, these three ECG leads are equally able to detect J point changes with exercise and hyperventilation, but exercise results in a relatively greater downward ST segment shift than does hyperventilation.en
dc.description.degreeMaster of Scienceen
dc.format.extentiv, 71 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-04252009-040711en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-04252009-040711/en
dc.identifier.urihttp://hdl.handle.net/10919/42220en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1995.G355.pdfen
dc.relation.isformatofOCLC# 34271689en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectcardiovascularen
dc.subjectelectrocardiographyen
dc.subject.lccLD5655.V855 1995.G355en
dc.titleEffects of submaximal exercise and hyperventilation on ECG components in healthy, young adult men with recording leads typically used for evaluation of ischemic heart diseaseen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineEducationen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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