Does bad cholesterol hurt your heart if there's no plaque?
Low-Density Lipoprotein Cholesterol Is Predominantly Associated With Atherosclerotic Cardiovascular Disease Events in Patients With Evidence of Coronary Atherosclerosis: The Western Denmark Heart Registry
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
This study checks if high 'bad' cholesterol (LDL) leads to heart problems only in people who already have heart plaque.
No biological mechanisms were identified in this study. This may be an epidemiological, observational, or survey-based study that reports associations rather than proposing causal biological pathways.
Systematic Reviews & Meta-Analyses
Max 100Randomized Controlled Trials
Max 90Cohort Studies
Max 72Case-Control Studies
Max 58Cross-Sectional Studies
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Max 30Expert Opinion & Narrative Reviews
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Evidence Score
Groups of people are followed over time to see who develops an outcome. Strong for identifying risk factors and associations, but cannot prove causation as firmly as RCTs.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
This study checks if high 'bad' cholesterol (LDL) leads to heart problems only in people who already have heart plaque.
No biological mechanisms were identified in this study. This may be an epidemiological, observational, or survey-based study that reports associations rather than proposing causal biological pathways.
Systematic Reviews & Meta-Analyses
Max 100Randomized Controlled Trials
Max 90Cohort Studies
Max 72Case-Control Studies
Max 58Cross-Sectional Studies
Max 44Case Reports & Case Series
Max 30Expert Opinion & Narrative Reviews
Max 559 / 72
Evidence Score
Groups of people are followed over time to see who develops an outcome. Strong for identifying risk factors and associations, but cannot prove causation as firmly as RCTs.
Publication
Authors
Mortensen MB, Dzaye O, Bøtker HE, Jensen JM, Maeng M, Bentzon JF, Kanstrup H, Sørensen HT, Leipsic J, Blankstein R, Nasir K, Blaha MJ, Nørgaard BL
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Claims (6)
If you're a middle-aged person with symptoms, having higher 'bad' cholesterol (LDL) means you're more likely to have heart problems over the next four years — but only if scans show you already have plaque in your heart arteries.
If you're a middle-aged person with signs of heart disease and calcium in your arteries, having very high 'bad' cholesterol makes your risk of heart problems more than double. But if your arteries are clean, even sky-high cholesterol doesn’t seem to increase your risk.
If a middle-aged person has heart symptoms but no calcium buildup in their arteries, things like diabetes, smoking, and low 'good' cholesterol are linked to future heart problems — but their 'bad' cholesterol level doesn’t seem to matter, which might mean other non-plaque-related issues are causing the heart trouble.
If you have calcium buildup in your heart's arteries, the link between your 'bad' cholesterol and heart problems changes — it’s stronger or weaker depending on that calcium.
If a middle-aged person has higher 'bad' cholesterol, they're more likely to have buildup in their heart arteries — every 38.7-point rise means about a 17% higher chance of early heart disease signs, even if they already have symptoms.