Document Detail

Coronary haemodynamic effects of nifedipine. Comparison with glyceryl trinitrate.
MedLine Citation:
PMID:  6404288     Owner:  NLM     Status:  MEDLINE    
The coronary haemodynamic effects of nifedipine and glyceryl trinitrate were compared in 22 patients undergoing investigations for suspected coronary artery disease. Myocardial blood flow was estimated by the coronary sinus thermodilution technique. In sinus rhythm nifedipine increased mean coronary sinus flow from 135 ml/min to 152 ml/min, and reduced arterio-coronary sinus oxygen difference from 12.4 to 10.96 ml/100 ml without causing a significant change in coronary vascular resistance or in myocardial oxygen consumption. Glyceryl trinitrate reduced mean coronary sinus flow from 165 to 111 ml/min, myocardial oxygen consumption from 19.2 to 11.9 ml/min, and arterio-coronary sinus oxygen difference from 11.7 to 10.9 ml/100 ml. There was a rise in coronary vascular resistance from 54 355 to 74 364 dynes s cm-5. During atrial pacing nifedipine reduced the arterio-coronary sinus oxygen difference from 11.99 to 11.0 ml/100 ml but had no significant effect on the other variables measured. Glyceryl trinitrate caused a fall in mean coronary sinus flow from 207 ml/min to 168 ml/min; myocardial oxygen consumption fell from 24 ml/min to 18 ml/min, while coronary vascular resistance rose from 41 714 to 51 234 dynes s cm-5. Direct comparison of the two drugs showed a significant difference in effects on coronary sinus flow and coronary vascular resistance in sinus rhythm. Both drugs appeared effective in relieving ischaemia as judged by a reduction of the incidence of pacing induced angina and an improvement in lactate status.
D L Stone; J D Stephens; S O Banim
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  British heart journal     Volume:  49     ISSN:  0007-0769     ISO Abbreviation:  Br Heart J     Publication Date:  1983 May 
Date Detail:
Created Date:  1983-06-23     Completed Date:  1983-06-23     Revised Date:  2009-11-18    
Medline Journal Info:
Nlm Unique ID:  0370634     Medline TA:  Br Heart J     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  442-6     Citation Subset:  AIM; IM    
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MeSH Terms
Blood Pressure / drug effects
Cardiac Pacing, Artificial
Coronary Circulation / drug effects*
Coronary Disease / drug therapy*,  physiopathology
Heart Rate / drug effects
Nifedipine / therapeutic use*
Nitroglycerin / therapeutic use*
Pyridines / therapeutic use*
Reg. No./Substance:
0/Pyridines; 21829-25-4/Nifedipine; 55-63-0/Nitroglycerin

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

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