Document Detail


Increasing pre-excitation during exercise and isoproterenol infusion. Evidence for a catecholamine sensitive bypass tract.
MedLine Citation:
PMID:  469445     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
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.
Authors:
G M Weisfogel; R A Stein; A Fernaine; N Krasnow
Related Documents :
10686775 - Short-term effect of exercise on platelet factor 4 in normal subjects and in patients w...
8112905 - St-changes in ecg at rest or during exercise indicate a high risk of severe coronary le...
22933025 - Igf-i measurement across blood, interstitial fluid, and muscle biocompartments followin...
11959055 - The prognostic value of exercise testing in elderly men.
11849865 - Physical training modulates proinflammatory cytokines and the soluble fas/soluble fas l...
3842045 - Supplemental clinical dissections for freshman gross anatomy.
Publication Detail:
Type:  Case Reports; Journal Article    
Journal Detail:
Title:  Journal of electrocardiology     Volume:  12     ISSN:  0022-0736     ISO Abbreviation:  J Electrocardiol     Publication Date:  1979 Jul 
Date Detail:
Created Date:  1979-10-24     Completed Date:  1979-10-24     Revised Date:  2009-11-11    
Medline Journal Info:
Nlm Unique ID:  0153605     Medline TA:  J Electrocardiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  315-20     Citation Subset:  IM    
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
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:
0/Catecholamines; 7683-59-2/Isoproterenol

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Cardiac electrophysiologic effects of etafenone hydrochloride (Dialicor), a new antiarrhythmic agent...
Next Document:  Treatment of heart block due to sarcoid heart disease.