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Acute and long-term changes in serum lipids after acute stroke
Insights
Acute stroke patients show altered lipid profiles within 48 hours. Early measurements of serum lipids and lipoproteins may misrepresent their true risk factors for cerebral infarction.
Area of Science:
- Neurology
- Clinical Chemistry
- Cardiovascular Research
Background:
- Serum lipid profiles are investigated as potential risk factors for acute stroke.
- Previous studies often lacked detailed classification by stroke subtype.
- Understanding temporal changes in lipid levels post-stroke is crucial.
Purpose of the Study:
- To analyze changes in serum lipid profiles in acute stroke patients over time.
- To compare lipid profiles between different stroke subtypes (cerebral infarction, lacunar infarction, cerebral hemorrhage).
- To evaluate the impact of early measurements on identifying lipid risk factors.
Main Methods:
- Serum lipid profiles were measured in 171 acute stroke patients within 48 hours of onset and again 3 months later.
- Patients were categorized into cerebral infarction (n=83), lacunar infarction (n=53), and cerebral hemorrhage (n=35) groups.
- Key lipid parameters including total cholesterol, LDL-C, HDL3-C, triglycerides, apolipoprotein B, and lipoprotein (a) were assessed.
Main Results:
- Cerebral infarction patients showed significantly higher total cholesterol, LDL-C, and apolipoprotein B, and lower triglycerides and lipoprotein (a) within 48 hours compared to 3 months later.
- Lacunar infarction patients had higher total cholesterol and LDL-C early on, with otherwise similar profiles.
- Cerebral hemorrhage patients exhibited higher HDL3-C within 48 hours, with no other significant changes.
Conclusions:
- Early post-stroke lipid measurements (≤48 hours) can differ significantly from later values, particularly in cerebral infarction.
- Comparing acute lipid levels with controls may lead to misidentification of lipid fractions as risk factors.
- Stroke subtype classification is important for accurate interpretation of lipid profiles in stroke research.
Abstract:
We studied serum lipid profiles in 171 patients less than or equal to 48 hours after the onset of acute stroke and 3 months later. The 83 patients suffering cerebral infarction had significantly higher serum concentrations of total cholesterol, low density lipoprotein-cholesterol, and apolipoprotein B and significantly lower serum concentrations of triglycerides and lipoprotein (a) less than or equal to 48 hours after ictus than 3 months later. The lipid profiles of the 53 patients suffering lacunar infarction were similar on both occasions, the only significant differences being higher total cholesterol and low density lipoprotein-cholesterol concentrations less than or equal to 48 hours after ictus. No significant changes were observed among the 35 patients suffering cerebral hemorrhage apart from a significantly higher concentration of high density lipoprotein3-cholesterol less than or equal to 48 hours after ictus. Our study, with many patients classified according to stroke subtype, gives results different from those of previous studies with much fewer patients. We conclude that in studies of serum lipid and lipoprotein concentrations as risk factors for cerebral infarction, comparing values obtained less than or equal to 48 hours after admission with control values may incorrectly identify certain lipid fractions as risk factors.