Chest
Clinical InvestigationsPostoperative Pleural Changes after Coronary Revascularization: Comparison Between Saphenous Vein and Internal Mammary Artery Grafting
Section snippets
METHODS
We reviewed the operative report from the patients who underwent elective CABG between May 1984 and May 1986 at the Instituto do Coracao of the Faculty of Medicine of the University of Sao Paulo and selected 122 male patients for further study. Fifty-four patients (SVG group) had only SVG grafting and did not have excessive manipulation of their pleura. Sixty-eight patients (IMA group) had received at least one IMA graft in addition to the SVG grafts and had been subjected to pleurotomy.
A
RESULTS
The characteristics of the two groups were very comparable (Table 1). The only significant difference (p<0.05) was in age, but this was not felt to be clinically important. Most of the patients (112, 92 percent) were in functional class 1 while only 10 (8 percent) were in class 2 or 3.7
DISCUSSION
The present study as well as several previous studies8, 9, 10, 11 demonstrate that there is a high incidence of pleural changes after IMA grafting.
The incidence of pleural effusion in the present series is 42 percent. Most of the effusions are small and unilateral on the left. The effusions do not appear to be related to an enlarged cardiac silhouette, atelectasis or the placement of a chest tube. The incidence reported in the present series is comparable to that which has been reported by
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