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Plasma lipoproteins in cortical versus lacunar infarction with or without cardiac arrhythmia, and in transient
M Giroud1, M C Boutron, P Gras
1Service de Neurologie, Hôpital Général, Dijon, France.
Insights
Plasma lipid profiles differ in ischemic stroke subtypes. Cortical infarction shows abnormal lipoproteins, unlike lacunar infarction, suggesting distinct lipid-related risks for cerebrovascular disease.
Area of Science:
- Neurology
- Cardiology
- Metabolic Disorders
Background:
- Cerebrovascular diseases, including ischemic stroke, are major health concerns.
- Plasma lipid abnormalities are implicated in atherosclerosis and cardiovascular events.
- Differentiating stroke subtypes based on mechanism may reveal specific risk factors.
Purpose of the Study:
- To investigate the relationship between plasma lipid profiles and different types of ischemic cerebrovascular events.
- To determine if cardiac arrhythmias influence lipid profiles in cortical infarction.
- To compare lipid profiles across cortical infarction, lacunar infarction, and transient ischemic attacks (TAI).
Main Methods:
- Analysis of plasma lipid parameters including total cholesterol, VLDL, LDL, triglycerides, and apolipoproteins (Apo A1, Apo B, Apo E).
- Case-control study comparing patients with cortical infarction (with/without cardiac arrhythmias), lacunar infarction, and TAI.
- Assessment of LDL particle size and distribution.
Main Results:
- Cortical infarction (with/without cardiac arrhythmias) showed elevated total cholesterol, VLDL, LDL, triglycerides, Apo B, and LDL-Apo B, with decreased Apo E and altered LDL characteristics.
- TAI was associated with low HDL and normal Apo A1, LDL distribution, and weight.
- Lacunar infarction exhibited a normal plasma lipoprotein profile.
- Cardiac arrhythmias did not confer a distinct lipoprotein profile in cortical infarction.
Conclusions:
- Plasma lipid profiles differ significantly between cortical and lacunar infarction, suggesting distinct pathophysiological mechanisms.
- Lipid-related risk factors may be more relevant for cortical infarction than lacunar infarction.
- Stratifying ischemic stroke by mechanism, such as large versus small vessel atherosclerosis, is crucial for understanding lipid-related risks in cerebrovascular disease.
Abstract:
We investigated the relation of plasma lipids to the risk for cortical infarction with (22 cases) or without (38 cases) cardiac arrhythmias, for lacunar infarction (28 cases) and transient ischaemic attacks (TAI) (15 cases). In the group of cortical infarction with or without cardiac arrhythmias, we observed a maximum increase of total cholesterol, of very low density lipoprotein (VLDL) and low density lipoprotein (LDL), triglycerides, total Apolipoprotein (Apo) B, LDL-Apo B and Apo-A1. On the contrary, we observed a decrease of total ApoE, HDL-ApoE, a distribution of LDL in a single layer and the presence of LDL of small weight. TAI is different from the former group by a low level of HDL and the lack of abnormalities of Apo-A1, and on the distribution and the weight of LDL. Finally, lacunar infarction presents a normal plasma lipoprotein profile. These data suggest that previously demonstrated differences in LDL-cholesterol levels between patients with ischaemic stroke and control subjects may apply to patients with cortical but not lacunar infarction. The presence or not of a cardiac arrhythmia doesn't give a special lipoprotein profile, and TAI has no changes on the distribution and the weight of LDL. Therefore, separation of ischaemic strokes into types based on mechanism as large vessel atherosclerosis versus small vessel atherosclerosis may help clarify lipid-related risk factors in cerebrovascular disease.