Document Detail

Optimal timing of coronary artery bypass graft surgery after acute myocardial infarction.
MedLine Citation:
PMID:  7586463     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: To assess optimal timing for coronary artery bypass graft surgery (CABG) after an acute myocardial infarction (AMI), all patients undergoing CABG without associated procedures at our institution from January 1, 1991, to July 30, 1992, were reviewed. Patients were divided into three groups based on time from infarct to revascularization. The control group consisted of patients operated on for angina refractory to medical management. Relative risks (incident infarction group divided by incident control group) were established for need of vasopressors, new balloon to separate from bypass, perioperative myocardial infarction, and hospital mortality. METHODS AND RESULTS: One hundred sixteen patients underwent CABG within 6 weeks of infarction. In the experimental group, 58 patients underwent CABG for non-Q-wave infarction, and 58 patients underwent CABG for Q-wave infarction. In the control group, 255 patients underwent surgery for angina without infarction. Patients were analyzed by group relative to the time between infarction and CABG. Patients were analyzed between infarction and CABG and assigned to one of three groups. Group 1 patients were revascularized within 48 hours; group 2, between 3 and 5 days; and group 3, after 5 days. Significance was determined by Fisher's exact or Mantel-Haenszel chi 2 test where appropriate. Multivariate analysis was performed on statistics that were significant. All patients within all groups after Q-wave or non-Q-wave myocardial infarction had a significantly higher risk of needing an intra-aortic balloon pump and vasopressors to be weaned from bypass and a greater incidence of perioperative MI compared with control patients. Surgical mortality is highest immediately after Q-wave infarctions. CONCLUSIONS: Patients with non-Q-wave infarction may undergo CABG relatively safely at any time. Acceptable timing for CABG after Q-wave infarction is after 48 hours.
J H Braxton; G L Hammond; G V Letsou; K L Franco; G S Kopf; J A Elefteriades; J C Baldwin
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Publication Detail:
Type:  Clinical Trial; Controlled Clinical Trial; Journal Article    
Journal Detail:
Title:  Circulation     Volume:  92     ISSN:  0009-7322     ISO Abbreviation:  Circulation     Publication Date:  1995 Nov 
Date Detail:
Created Date:  1995-12-28     Completed Date:  1995-12-28     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0147763     Medline TA:  Circulation     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  II66-8     Citation Subset:  AIM; IM    
Section of Cardiothoracic Surgery, Yale University School of Medicine, New Haven, Conn 06520, USA.
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MeSH Terms
Angina Pectoris / surgery
Coronary Artery Bypass*
Intra-Aortic Balloon Pumping
Middle Aged
Multivariate Analysis
Myocardial Infarction / mortality,  physiopathology,  surgery*,  therapy
Time Factors
Treatment Outcome
Vasoconstrictor Agents / therapeutic use
Reg. No./Substance:
0/Vasoconstrictor Agents

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

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