Document Detail


Paradoxical elevation of threshold to angina pectoris by cold pressor test in men with significant coronary artery disease.
MedLine Citation:
PMID:  2923057     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Patients with coronary artery disease (CAD) have angina pectoris at varying levels of myocardial oxygen demand. Fluctuations in coronary blood supply due to dynamic changes in coronary vasomotor tone are believed to be responsible for this variation in angina threshold. Cutaneous cold application produces an inappropriate increase in coronary vascular resistance in patients with CAD. To assess the effect of a coronary vasoconstrictor stimulus during exercise (when there are competitive stimuli for coronary dilatation), 16 men with documented CAD and angina underwent 2 exercise tolerance tests, 1 performed for control purposes and the other during cold application (hand and forearm immersed in ice). The cold pressor test elicited an increase in systolic blood pressure at rest (134 vs 159 mm Hg, p less than 0.02) at the end of stage I (145 vs 165 mm Hg, p less than 0.02) and at peak exercise (154 vs 166 mm Hg, p less than 0.05). The diastolic pressure was similarly increased during cold pressor exercise test, but the heart rate showed little or no change. Most patients (11 of 16) tolerated equal or greater double products (heart rate X systolic pressure X 10(-3) at angina (17 vs 20, p less than 0.02), 1-mm ST-segment depression (16 vs 18, p less than 0.05) and peak exercise (18 vs 20, p less than 0.08) during cold pressor exercise test as compared with the baseline exercise test, without a reduction in exercise capacity.(ABSTRACT TRUNCATED AT 250 WORDS)
Authors:
R W Nesto; G A Lamas; J Barry
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The American journal of cardiology     Volume:  63     ISSN:  0002-9149     ISO Abbreviation:  Am. J. Cardiol.     Publication Date:  1989 Mar 
Date Detail:
Created Date:  1989-04-14     Completed Date:  1989-04-14     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0207277     Medline TA:  Am J Cardiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  656-9     Citation Subset:  AIM; IM    
Affiliation:
Cardiovascular Division, Brigham and Women's Hospital, Boston, Massachusetts.
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MeSH Terms
Descriptor/Qualifier:
Adult
Aged
Angina Pectoris / diagnosis*
Blood Pressure*
Cold Temperature / diagnostic use*
Coronary Circulation
Coronary Disease / diagnosis*
Coronary Vessels / physiopathology
Electrocardiography
Exercise Test
Heart Rate
Humans
Male
Middle Aged
Myocardium / metabolism
Oxygen Consumption
Vascular Resistance

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


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