| Increasing pre-excitation during exercise and isoproterenol infusion. Evidence for a catecholamine sensitive bypass tract. | |
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MedLine Citation:
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PMID: 469445 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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A patient with atypical chest pain developed pre-excitation during exercise and isoproterenol infusion, with "ischemic" ST depression only during the pre-excited beats. Coronary angiography and myocardial lactate extraction showed no evidence of abnormal coronary vessels. Electrophysiologic study and pacing-induced tachycardia did not induce pre-excitation, whereas exercise induced progressive increase in pre-excitation. The data are consistent with an unusual form of pre-excitation, perhaps related to responsiveness of an accessory bypass tract to catecholamine stimulation. The data also show that the false positive exercise test in this syndrome is due to progressively increasing pre-excitation and therefore more abnormal repolarization. |
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Authors:
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G M Weisfogel; R A Stein; A Fernaine; N Krasnow |
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Publication Detail:
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Type: Case Reports; Journal Article |
Journal Detail:
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Title: Journal of electrocardiology Volume: 12 ISSN: 0022-0736 ISO Abbreviation: J Electrocardiol Publication Date: 1979 Jul |
Date Detail:
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Created Date: 1979-10-24 Completed Date: 1979-10-24 Revised Date: 2009-11-11 |
Medline Journal Info:
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Nlm Unique ID: 0153605 Medline TA: J Electrocardiol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 315-20 Citation Subset: IM |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Arrhythmias, Cardiac / etiology, physiopathology* Catecholamines / physiology* Electrocardiography* Electrophysiology Exercise Test Heart Catheterization Heart Conduction System / physiopathology* Humans Isoproterenol / adverse effects* Physical Exertion* |
| Chemical | |
Reg. No./Substance:
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0/Catecholamines; 7683-59-2/Isoproterenol |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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