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Differential lipid impact on mortality in patients undergoing CABG versus PCI
Xin Yuan1, Lihua Zhang2, Xi Li2
1Department of Cardiovascular Surgery, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
Insights
High lipid levels, including total cholesterol and LDL-C, are linked to increased mortality after coronary artery bypass grafting (CABG) and percutaneous coronary intervention (PCI). This association is more pronounced in patients who underwent PCI.
Area of Science:
- Cardiology
- Vascular Medicine
- Public Health
Background:
- Lipid control efficacy post-revascularization (CABG/PCI) is not fully understood.
- Associations between lipid levels and mortality after revascularization need clarification.
Purpose of the Study:
- To assess the link between lipid levels and all-cause/cardiovascular mortality in patients after PCI or CABG.
- To compare the impact of lipid control on mortality between PCI and CABG patient groups.
Main Methods:
- Utilized data from the ChinaHEART cohort.
- Included patients with a history of PCI or CABG.
- Employed Cox proportional hazards regression models to analyze associations between lipid levels and mortality.
Main Results:
- 29,003 participants (82.6% PCI, 17.4% CABG) were analyzed.
- Elevated TC, LDL-C, and non-HDL-C correlated with increased all-cause mortality (HRs 1.16-1.23 per 1 mmol/L increase).
- Significant associations were found in PCI patients, but not in CABG patients.
Conclusions:
- Elevated lipid levels are associated with mortality in revascularization patients.
- Suboptimal lipid control has a greater impact on mortality in PCI patients.
- Longer follow-up may be needed to observe lipid effects on mortality in CABG patients.
Background And Aims:
The impact of revascularization type, including coronary artery bypass grafting (CABG) and percutaneous coronary intervention (PCI), on lipid control efficacy remains unclear. We aim to assess the associations of lipid levels with all-cause and cardiovascular mortality in patients undergoing PCI or CABG.
Methods:
We used data from the ChinaHEART cohort and enrolled patients with a self-reported history of PCI or CABG. We employed Cox proportional hazards regression models to evaluate the associations between lipid levels and mortality.
Results:
Our analysis included 29 003 participants, of whom 23 959 (82.6 %) undergoing PCI and 5044 (17.4 %) undergoing CABG. Over a median follow-up of 3.22 years, 1007 deaths were recorded, with 579 attributed to cardiovascular causes. Each 1 mmol/L increase in TC, LDL-C, and non-HDL-C was associated with multivariable-adjusted HRs of 1.16 (95 % CI 1.10,1.22), 1.23 (1.15,1.32) and 1.16 (1.10,1.23) for all-cause mortality, respectively. Similar results were observed in patients undergoing PCI, while no significant associations were found in patients undergoing CABG.
Conclusions:
Elevated lipid levels are associated with all-cause and cardiovascular mortality in revascularization patients. Suboptimal lipid control appears to have a more pronounced effect on mortality in patients undergoing PCI. The effects of elevated lipid levels on mortality in CABG patients may need a longer follow-up to manifest due to the more complex nature of the grafts and the long-term adaptation process.
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