lipid particle size
The physical dimensions of lipoprotein particles, with smaller particles generally conferring higher cardiovascular risk.
Full Definition
Lipid particle size refers to the physical dimensions of lipoprotein particles, particularly LDL and HDL particles, which can vary significantly among individuals with similar cholesterol levels. Small, dense LDL particles are more atherogenic than large, buoyant particles due to increased penetration of arterial walls, prolonged circulation time, and enhanced susceptibility to oxidation. Advanced lipid testing can measure particle size distribution, typically categorized into patterns A (large particles) and B (small particles). This measurement provides additional cardiovascular risk information beyond standard lipid panels.
Usage
Usage note: Distinguish between particle size and particle number when discussing advanced lipid testing.
In Context
- "Advanced lipid testing revealed predominantly small, dense LDL particles despite normal total cholesterol." — lipid specialty consultation
- "Lipid particle size analysis helped explain the patient's premature coronary disease." — case presentation