Background/aims: Patients with chronic kidney disease (CKD) have a dramatically increased risk for cardiovascular mortality. Few prior studies have examined the independent association of CKD with coronary anatomy.
Methods: We evaluated the relationship between CKD and severe coronary artery disease (CAD) in 261 male veterans with nuclear perfusion imaging tests suggesting coronary ischemia. We used chart review and patient and provider interviews to collect demographics, clinical characteristics, and coronary anatomy results. We defined CKD as an estimated glomerular filtration rate (eGFR) < 60 ml/min/1.73 m2, based on the creatinine obtained prior to angiography. We defined significant coronary obstruction as at least one 70% or greater stenosis. We used logistic regression to determine whether CKD was independently associated with significant coronary obstruction.
Results: The likelihood of CAD increased monotonically with decreasing eGFR, from 51% among patients with eGFR or = 90 ml/min/1.73 m2 to 84% in those with eGFR < 30 ml/min/1.73 m2 (p = 0.0046). Patients with CKD were more likely than those without CKD to have at least one significant coronary obstruction (75.9 vs. 60.7%, p = 0.016). Patients with CKD also had more significant CAD, that is, were more likely to have three-vessel and/or left main disease than those without CKD (34.9 vs. 16.9%, p = 0.0035). In logistic regression analysis, controlling for demographics and comorbidity, CKD continued to be independently associated with the presence of significant CAD (p = 0.0071).
Conclusion: CKD patients have a high prevalence of obstructive coronary disease, which may contribute to their high cardiovascular mortality.
2007 S. Karger AG, Basel