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CLINICAL STUDIES

Does coronary angiography before emergency aortic surgery affect in-hospital mortality?

^a Department of Cardiology, Cleveland Clinic Foundation, Cleveland, Ohio, USA
^b Department of Cardiothoracic Surgery, Cleveland Clinic Foundation, Cleveland, Ohio, USA

Manuscript received March 10, 1999; revised manuscript received August 24, 1999, accepted December 2, 1999.

Reprint requests and correspondence: Dr. Marc S. Penn, Department of Cell Biology, NC10, Lerner Research Institute, Cleveland Clinic Foundation, 9500 Euclid Avenue, Cleveland, Ohio 44195
pennm{at}ccf.org

OBJECTIVES

To study the relationship between coronary angiography and in-hospital mortality in patients undergoing emergency surgery of the aorta without a history of coronary revascularization or coronary angiography before the onset of symptoms.

BACKGROUND

In the setting of acute ascending aortic dissection warranting emergency aortic repair, coronary angiography has been considered to be desirable, if not essential. The benefits of defining coronary anatomy have to be weighed against the risks of additional delay before surgical intervention.

METHODS

Retrospective analysis of patient charts and the Cardiovascular Information Registry (CVIR) at the Cleveland Clinic Foundation.

RESULTS

We studied 122 patients who underwent emergency surgery of the aorta between January 1982 and December 1997. Overall, in-hospital mortality was 18.0%, and there was no significant difference between those who had coronary angiography on the day of surgery compared with those who had not (No: 16%, n = 81 vs. Yes: 22%, n = 41, p = 0.46). Multivariate analysis revealed that a history of myocardial infarction (MI) was the only predictor of in-hospital mortality (relative risk: 4.98 95% confidence interval: 1.48–16.75, p = 0.009); however, coronary angiography had no impact on in-hospital mortality in patients with a history of MI. Furthermore, coronary angiography did not significantly affect the incidence of coronary artery bypass grafting (CABG) during aortic surgery (17% vs. 25%, Yes vs. No). Operative reports revealed that 74% of all CABG procedures were performed because of coronary dissection, and not coronary artery disease.

CONCLUSIONS

These data indicate that determination of coronary anatomy may not impact on survival in patients undergoing emergency surgery of the aorta and support the concept that once diagnosed, patients should proceed as quickly as possible to surgery.

Abbreviations and Acronyms   CABG = coronary artery bypass graft   CAD = coronary artery disease   CPB = cardiopulmonary bypass   ECG = electrocardiogram   MI = myocardial infarction   RR = relative risk

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