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Even with LDL under control, heart attacks still happen — and researchers may finally know why. A new study from Chalmers University of Technology found that two other fat-carrying particles, TRL and Lp(a), promote inflammation and blood vessel damage through mechanisms that go beyond cholesterol buildup. The findings, published in the European Heart Journal, could open the door to more targeted heart disease prevention.
Even with LDL ("bad cholesterol") at healthy levels, some people still suffer heart attacks — a frustrating reality that has puzzled cardiologists for years. Now, researchers at Chalmers University of Technology in Sweden think they've found a key piece of the puzzle. Using proteomics analysis of nearly 3,000 blood proteins, the team discovered that two other fat-carrying particles — triglyceride-rich lipoproteins (TRL) and lipoprotein(a) [Lp(a)] — may drive cardiovascular damage through inflammation and structural changes in blood vessel walls, not just cholesterol deposits.
What makes the finding especially striking is the overlap between TRL and Lp(a). Despite being distinct particle types, they showed remarkably similar blood protein patterns — both linked to immune cell recruitment and vascular inflammation — and both associated with later development of heart disease. LDL, by contrast, was primarily tied to cholesterol accumulation in artery walls, suggesting each particle type contributes to heart disease through different biological routes.
Key Takeaways:
Why it matters: This research helps explain the "residual risk" that persists even after successful LDL reduction — a gap that affects millions of patients on statins. Identifying TRL and Lp(a) as inflammation-driving culprits could eventually lead to more personalized prevention strategies and new therapeutic targets.
