Nepal Journal of Neuroscience
Official Journal of Nepalese Society of Neurosurgeons
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Ultrasonographic Evalution of Carotid Luminal Diameter and Plaques Morphology in Stroke Patients.

GS Gurung, MD, Ram K. Ghimire, MD, Mohan R. Sharma, MS, Benu Lohani, MD, LR Pokhrel, MD
Ghanashyam Gurung, MD Department of Radiology Tribhuvan University Teaching Hospital Maharajgunj, Kathmandu Nepal Ram K Ghimire, MD Department of Radiology Tribhuvan University Teaching Hospital Maharajgunj, Kathmandu Nepal Mohan R Sharma, MD Division of Neurosurgery Tribhuvan University Teaching Hospital Maharajgunj, Kathmandu Nepal Benu Lohani, MD Department of Radiology Tribhuvan University Teaching Hospital Maharajgunj, Kathmandu Nepal LR Pokharel, MD Departm

Abstract
The aim of this study is to evaluate carotid stenosis and plaque morphology in stroke patients. High resolution carotid ultrasound of bilateral carotid artery was done in 110 clinically proven stroke patients. Intimomedial thickness (IMT) was assessed 1-1.5 cm proximal to the bulb. For plaques the near and far walls of the arterial segments were scanned both longitudinally and transversely. Plaques were classified as low, moderate and strongly echogenic with shadowing (calcified). Carotid luminal diameter was measured in transverse plane perpendicular to the long axis of the vessel at the end of the diastole. Percentage of stenosis was calculated using both cross sectional and velocimetric criteria. Plaques were more common in the carotid bulb (43.6% on right side and 53.6%on left side) and most common was calcified type (29.1%) which was predominant on left side. In internal carotid artery (ICA) moderately echogenic plaques (8.1%) were more common. Plaques were less common in common carotid artery (CCA). Duplex color Doppler sonography of the carotid artery is a noninvasive, accurate and cost effective screening modality in stroke patients.

Key Words: Carotid stenosis, Doppler sonography, intimomediathickness, plaques