Limitations
The primary limitation of the present study is the associated potential for treatment selection bias. The patients who underwent PCI were selected on the basis of favorable coronary anatomy for this procedure, which is an important selection bias. Also, all patients had single-vessel coronary artery disease with normal left ventricular ejection fractions, and few or no comorbidities. High risk patients were excluded from this study.
The follow-up of the patients was limited to 1 year, and thus no statement may be made regarding long-term differences in outcomes, as might be expected when comparing PCI and CABG.