Why the study?
Among patients with heart failure, the use of lipid lowering drugs in the presence of low cholesterol might be dangerous, prompting evaluation of baseline lipid levels and survival in younger patients with severe HF.
Does higher baseline LDL-c predict better survival in younger patients (≤51 years old) with severe heart failure?
Cohort (n=82)
Does higher baseline LDL-c predict better survival in younger patients (≤51 years old) with severe heart failure?
Absolute Event Rate: 83% vs 50%
p-value: p=0.043
In younger patients (≤51 years) with severe heart failure, low LDL-c levels (≤80 mg/dl) are associated with significantly higher mortality compared to levels >115 mg/dl, suggesting a reverse epidemiology phenomenon.
Low baseline cholesterol may signal higher mortality in young severe HF; hypothesis-generating for lipid management strategies.
Background and Objectives: Hypercholesterolemia is a main risk-factor leading to ischemic heart disease (IHD). However, among patients with heart failure, the use of lipid lowering drugs in the presence of low cholesterol might be dangerous. This 18-year longitudinal study of patients ≤51 years old investigated the relationship between baseline total cholesterol, low-density lipoprotein cholesterol (LDL-c) and triglyceride levels, and survival among patients with severe HF. Materials and Methods: The average NYHA score of 82 patients ≤51 years old with heart failure was 2.61. They were followed for a mean of 11.3 years (15 months–20 years). Total mortality was 22%. Patients were divided into three groups. Group 1 had plasma LDL-c levels ≤ 80 mg/dl, Group 2, 80–115 mg/dl and Group 3 > 115 mg/dl. Results: Patients with the highest baseline total cholesterol, triglyceride and LDL-c levels > 115 mg/dl had a better survival rate (83%) compared to those with LDL-c < 80 mg/dl (50% survival, p = 0.043). The association between higher LDL-c levels and lower mortality was most noticeable among patients with heart failure. Conclusion: Longitudinal follow-up found that low LDL-c levels may indicate poorer prognosis among patient with heart failure who are ≤51 years old, similar to elderly heart failure patients. Cholesterol lowering drugs in younger patients with heart failure may increase mortality.
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Charach et al. (2023) conducted a cohort in severe heart failure (n=82). Baseline LDL-c > 115 mg/dl vs. Baseline LDL-c < 80 mg/dl was evaluated on survival (p=0.043).
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