Association of Relative LDL-Cholesterol Reduction With Cardiovascular Outcomes After Percutaneous Coronary...

Area of Science:

• Cardiology
• Lipid Metabolism
• Preventive Medicine

Background:

• Intensive low-density lipoprotein cholesterol (LDL-C) lowering is vital for secondary prevention post-percutaneous coronary intervention (PCI).
• Focus has been on achieved LDL-C levels, with less clarity on the prognostic impact of relative LDL-C reduction.
• The combined effect of achieved LDL-C and relative reduction in PCI patients is not well understood.

Purpose of the Study:

• To investigate the prognostic significance of relative LDL-C reduction after PCI.
• To evaluate the joint influence of achieved LDL-C levels and relative LDL-C reduction on cardiovascular risk.
• To assess dose-response relationships between LDL-C reduction and major adverse cardiovascular events.

Main Methods:

• Retrospective analysis of 809 patients undergoing PCI between 2006 and 2016.
• Calculation of relative LDL-C reduction from baseline and follow-up measurements.
• Use of Cox proportional hazards models and generalized additive models to assess associations with major adverse cardiovascular events plus coronary revascularization.

Main Results:

• Greater relative LDL-C reduction showed a nonlinear association with significantly lower risk of cardiovascular events (P=0.0001).
• Progressively lower risk was observed with 30-49% and ≥50% relative LDL-C reduction compared to <30%.
• Achieved LDL-C <55 mg/dL was associated with lower risk, with optimal outcomes when combined with substantial relative reduction.

Conclusions:

• Relative LDL-C reduction offers significant prognostic information post-PCI.
• This finding complements achieved LDL-C levels in risk assessment.
• Results support current guideline-based lipid-lowering strategies for secondary prevention.