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.author | Gallagher, Libby A. | en |
dc.contributor.committeechair | Herbert, William G. | en |
dc.contributor.committeemember | Sebolt, Don R. | en |
dc.contributor.committeemember | Humphrey, Reed H. | en |
dc.contributor.department | Education | en |
dc.date.accessioned | 2014-03-14T21:34:29Z | en |
dc.date.adate | 2009-04-25 | en |
dc.date.available | 2014-03-14T21:34:29Z | en |
dc.date.issued | 1995-05-01 | en |
dc.date.rdate | 2009-04-25 | en |
dc.date.sdate | 2009-04-25 | en |
dc.description.abstract | The 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.degree | Master of Science | en |
dc.format.extent | iv, 71 leaves | en |
dc.format.medium | BTD | en |
dc.format.mimetype | application/pdf | en |
dc.identifier.other | etd-04252009-040711 | en |
dc.identifier.sourceurl | http://scholar.lib.vt.edu/theses/available/etd-04252009-040711/ | en |
dc.identifier.uri | http://hdl.handle.net/10919/42220 | en |
dc.language.iso | en | en |
dc.publisher | Virginia Tech | en |
dc.relation.haspart | LD5655.V855_1995.G355.pdf | en |
dc.relation.isformatof | OCLC# 34271689 | en |
dc.rights | In Copyright | en |
dc.rights.uri | http://rightsstatements.org/vocab/InC/1.0/ | en |
dc.subject | cardiovascular | en |
dc.subject | electrocardiography | en |
dc.subject.lcc | LD5655.V855 1995.G355 | en |
dc.title | 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 | en |
dc.type | Thesis | en |
dc.type.dcmitype | Text | en |
thesis.degree.discipline | Education | en |
thesis.degree.grantor | Virginia Polytechnic Institute and State University | en |
thesis.degree.level | masters | en |
thesis.degree.name | Master of Science | en |
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