Relationship between renal dysfunction and severity of coronary artery disease in Japanese patients.
BACKGROUND
The relationship between renal dysfunction and the severity of coronary artery disease (CAD) was examined.


RESULTS
The severity of CAD in 572 patients was graded according to the number of stenotic coronary arteries, and the estimated glomerular filtration rate (eGFR) was monitored for 3 years. Patients were stratified into 3 eGFR groups: normal (>75 ml x min(-1) x 1.73 m(-2)), mild reduction (60-75) and chronic kidney disease (CKD: <60). There were 161 patients in the CKD group. The average number of stenotic coronary arteries was larger in the CKD group than in the other groups (normal vs mild reduction vs CKD =1.35+/-0.07 (SE) vs 1.22+/-0.08 vs 1.69+/-0.08 vessel disease (VD), P<0.001). During the 3-year follow-up, the renal function of 13.8% of the patients worsened. Those who showed more deterioration of eGFR had more severe CAD than those who did not (1.20+/-0.06 vs 1.61+/-0.06 VD, P<0.001). Multivariate analysis revealed that the severity of CAD was independently and significantly associated with the deterioration of eGFR.


CONCLUSIONS
Patients with CKD had more severe CAD, which may explain the high rate of cardiovascular events in these patients. Moreover, the prognosis of renal function was poor in patients with severe CAD, and CAD was found to be an independent risk factor for worsening of renal dysfunction.
Kiyosue
Arihiro
A
Department of Cardiovascular Medicine, Graduate School of Medicine, University of Tokyo, Tokyo, Japan.
Hirata
Yasunobu
Y
Ando
Jiro
J
Fujita
Hideo
H
Morita
Toshihiro
T
Takahashi
Masao
M
Nagata
Daisuke
D
Kohro
Takahide
T
Imai
Yasushi
Y
Nagai
Ryozo
R
D000368:Aged; D002908:Chronic Disease; D003324:Coronary Artery Disease / Q000150:complications* / Q000503:physiopathology*; D005260:Female; D005500:Follow-Up Studies; D005919:Glomerular Filtration Rate / Q000502:physiology; D006801:Humans; D007564:Japan; D007668:Kidney / Q000503:physiopathology*; D007674:Kidney Diseases / Q000453:epidemiology / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D012189:Retrospective Studies; D012307:Risk Factors; D012720:Severity of Illness Index