Continued efficacy of LDL-c lowering, even below 40 mg/dL, in high risk patients

Introduction and methods

In the FOURIER trial, LDL-c levels were lowered by the PCSK9 inhibitor evolocumab from a median of 93 mg/dL to 30 mg/dL [1]. It is unknown however whether there is still additional benefit of lowering LDL-c below thresholds in the guidelines, for example below 40 mg/dL.

Therefore, an exploratory analysis of FOURIER was conducted utilizing comparisons of randomized groups and analyzing in the context of the magnitude of LDL-c lowering below targets.

FOURIER was a CV outcomes trial in which evolocumab was compared to placebo in 27,564 patients with stable ASCVD on optimal statin therapy [1]. Endpoint was major adverse cardiovascular events (MACE), defined as CV death, MI or stroke. Median follow-up was 2.2 years. Ultracentrifugation was done when LDL- c was <40 mg/dL. 65% of Patients on evolocumab achieved an LDL <40 mg/dL.

Main results

• The further baseline LDL-c levels were <93 mg/dL, the greater the proportion of LDL-c lowering was <40 mg/dL.
• A consistent benefit on MACE of LDL-c lowering was seen regardless of how low the baseline LDL-c was (and lower LDL-c baseline was associated with greater proportion of patients reaching LDL-c <40 mg/dL) (Pinteraction=0.78).
• A similar pattern was seen for apoB and non-HDL-c lowering.
• There was no difference in absolute risk reduction at lower baseline LDL-c.

Conclusion

References

Find this article online at Circulation