Safety, feasibility, and incremental value of ultralow and zero contrast PCI in an all-comers registry.

Background: Patients with chronic kidney disease and CAD have been denied revascularization because of fear of precipitating acute renal failure from contrast exposure. Skepticism on whether Ultra-Low contrast percutaneous coronary intervention (PCI) or Zero contrast PCI (ULC/ZC PCI) can be safely performed has limited its adoption.

Methods: This observational registry enrolled 200 consecutive patients referred for elective PCI at a single center from June 2021 to December 2022. The study investigated whether the clinical outcomes of PCI performed with UL/ZC-PCI (n-48) were comparable to outcomes following standard PCI (n-152).

Results: Both groups were well matched in baseline and procedural characteristics. The groups had a highly statistical difference in the use of CV. Mean CV was 19.17 ± 7.29 cc in the ULC/ZC-group and 147.14 ± 73.55 cc in the control arm. The principal findings of the study were that the incidence of ontrast-induced acute kidney injury (AKI) was eightfold lower in patients receiving UL/ZC compared to the control group that received standard PCI. The incidence of all-cause mortality, myocardial infarction and major bleeding were similar in both groups. At 6 months, the decrement in renal function was lower in the group that received lower volumes of contrast.

Conclusions: This single center observational registry demonstrated that UL-C/ZC-PCI is safe and effective in a broad spectrum of complex lesions. The skillsets needed to perform this are teachable, widely applicable and do not require a large upgrade of capital equipment. AKI rates and decrement in renal function at 6 months were both significantly lower in the UL-ZC group.