TITLE

Influence of time elapsed between myocardial infarction and coronary artery bypass grafting surgery on operative mortality

AUTHOR(S)
Voisine, Pierre; Mathieu, Patrick; Doyle, Daniel; Perron, Jean; Baillot, Richard; Raymond, Gilles; Métras, Jacques; Dagenais, François
PUB. DATE
March 2006
SOURCE
European Journal of Cardio-Thoracic Surgery;Mar2006, Vol. 29 Issue 3, p319
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Abstract: Objective: Optimal timing for CABG surgery after myocardial infarction (MI) remains controversial. We examined the influence of patient age and time elapsed between MI and isolated CABG surgery on operative mortality. Methods: Perioperative data of 13,545 patients who underwent isolated CABG surgery from 1991 to 2005 were reviewed. A previous MI was found in 7219 patients, classified among groups A–E whether they underwent surgery less than 6h (A, n =26), between 6 and 24h (B, n =51), between 1 and 7 days (C, n =313), between 8 and 30 days (D, n =917), or more than 30 days (E, n =5912) after the event. Crude percentages and odds ratio estimates of operative mortality were calculated. Results: In patients who had no history of MI, the mortality rate was 1.7%, while it was, respectively, 19.2, 9.8, 8.6, 3.2, and 2.4% in patients from groups A to E. Among 6589 patients over 65 years of age, 3027 had no history of MI. Their mortality was 2.4%, compared to, respectively, 35.7, 13.8, 11.3, 5.1, and 3.9% for those belonging to groups A–E. Overall odds ratio estimates of operative mortality were 3.92 (p =0.19), 5.08 (p =0.002), 4.33 (p =0.0001), 1.50 (p =0.08), and 1.18 (p =0.24) for groups A–E, respectively. Conclusions: Operative mortality is not influenced by a history of MI sustained more than 30 days prior to isolated CABG surgery, but is highly and most significantly increased between 6h and 1 week after MI, especially in older patients. That critical period should be avoided whenever possible.
ACCESSION #
19687938

 

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