Efficacy and Safety of Coronary Sinus Aspiration During Coronary Angiography to Attenuate the Risk of Contrast-Induced Acute Kidney Injury in Predisposed Patients.

Background: The incidence of contrast-induced acute kidney injury is strongly related to the amount of the given contrast. Our objectives were to evaluate the efficacy and safety of coronary sinus aspiration (CSA) procedure to reduce the volume of the given contrast and attenuate the risk of contrast-induced acute kidney injury.

Methods And Results: The study included 43 patients with type 2 diabetes mellitus and renal impairment (creatinine 1.5-3 mg/dL) who were candidates for coronary angiography. Eighteen patients were subjected to CSA procedure during coronary angiography (CSA group), and 25 patients served as a control group. Periprocedural standard care was given. In CSA group, the coronary sinus was cannulated via subclavian or femoral venous approaches, and aspiration was done directly from a transseptal sheath (8 patients) or through a balloon occlusion catheter placed through the sheath (10 patients) simultaneously during each coronary injection. Estimated volume of aspirated contrast was calculated based on the percentage reduction in hematocrit value of the aspirate in relation to the patient's baseline hematocrit. Fraction of aspirated contrast was calculated by dividing estimated volume of aspirated contrast over the volume of injected contrast×100. Both study groups were matched in clinical and laboratory data, as well as volume of injected contrast. In CSA group, mean fraction of aspirated contrast was 39.35±10.47%. One patient in the CSA group, compared with 9 patients in the control group, developed contrast-induced acute kidney injury (P=0.028).

Conclusions: CSA during coronary angiography could effectively remove more than one third of the given contrast and may reduce the incidence of contrast-induced acute kidney injury in selected patients.