CONCLUSION
ACKD is independently associated with higher mortality in patients undergoing PCI. Therefore, PCI in these patients should be performed with more caution.
LIMITATIONS:  We used ICD-9 coding with inherent limitations as administrative coding has limitations in inaccuracy. We studied patients who underwent PCI which introduces selection bias as many patients with ACKD may have been treated conservatively limiting our patients to a specifically selected group undergoing PCI based on the patient’s presentation and preference.