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Association of Age and Size of Carotid Artery Intraplaque Hemorrhage and Minor Fibrous Cap Disruption: A High Resolution Magnetic Resonance Imaging Study.
Journal of Atherosclerosis and Thrombosis 2018 April 18
AIM: To investigate the association between the volumes of different aging intraplaque hemorrhage (IPH) and minor fibrous cap disruption (MFCD) in carotid arteries.
METHODS: Patients with cerebrovascular symptoms and carotid atherosclerotic plaques determined by ultrasound were recruited and underwent multi-contrast magnetic resonance (MR) vessel wall imaging for carotid arteries. Carotid plaques with IPH on MR imaging were included in the analysis. The age (fresh or recent) and the volume of IPH for each plaque were evaluated.
RESULTS: In total, 41 carotid plaques in 37 patients (mean age 70.2±11.0 years old; 32 males) were eligible for statistical analysis. The absolute volume of fresh IPH in plaques with MFCD was significantly larger than that in plaques without MFCD (109.83±75.49 mm3 vs. 30.54±20.62 mm3 , P=0.002). Logistic regression showed that the absolute volume of fresh IPH was significantly associated with MFCD before (odds ratio [OR], 1.735; 95% confidence interval [CI], 1.127-2.670; P=0.012) and after adjusting for confounding factors (OR, 1.823; 95% CI, 1.076-3.090; P=0.026). There was no significant association between recent IPH volume and MFCD (P>0.05).
CONCLUSION: The volume of fresh IPH is independently associated with MFCD in carotid plaques, suggesting that integrity of fibrous cap may change with different age and size of IPH.
METHODS: Patients with cerebrovascular symptoms and carotid atherosclerotic plaques determined by ultrasound were recruited and underwent multi-contrast magnetic resonance (MR) vessel wall imaging for carotid arteries. Carotid plaques with IPH on MR imaging were included in the analysis. The age (fresh or recent) and the volume of IPH for each plaque were evaluated.
RESULTS: In total, 41 carotid plaques in 37 patients (mean age 70.2±11.0 years old; 32 males) were eligible for statistical analysis. The absolute volume of fresh IPH in plaques with MFCD was significantly larger than that in plaques without MFCD (109.83±75.49 mm3 vs. 30.54±20.62 mm3 , P=0.002). Logistic regression showed that the absolute volume of fresh IPH was significantly associated with MFCD before (odds ratio [OR], 1.735; 95% confidence interval [CI], 1.127-2.670; P=0.012) and after adjusting for confounding factors (OR, 1.823; 95% CI, 1.076-3.090; P=0.026). There was no significant association between recent IPH volume and MFCD (P>0.05).
CONCLUSION: The volume of fresh IPH is independently associated with MFCD in carotid plaques, suggesting that integrity of fibrous cap may change with different age and size of IPH.
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