The Prevalence of Microhemorrhage on Gradient-Echo Magnetic Resonance Imaging in Acute Lacunar Infarction

J Stroke Cerebrovasc Dis. Jul-Aug 2005;14(4):141-4. doi: 10.1016/j.jstrokecerebrovasdis.2005.05.003.

Abstract

Introduction: Microhemorrhages seen on gradient-echo magnetic resonance imaging are thought to be a manifestation of small-vessel disease. It was the aim of our study to evaluate the prevalence of microhemorrhage for patients presenting with acute lacunar infarction.

Methods: We obtained gradient-echo and diffusion-weighted magnetic resonance imaging as part of the acute stroke workup in 46 patients presenting with lacunar infarction.

Results: Gradient-echo magnetic resonance imaging was abnormal in 24 of 46 (52%) patients. Microhemorrhage was seen in 21 patients (46%), 2 patients had multiple microhemorrhages and a frank hemorrhage, and 3 patients had frank hemorrhage in the absence of microhemorrhage. Prior symptomatic stroke was the only significant risk factor for the presence of microhemorrhages.

Conclusion: Microhemorrhages are present in approximately half of patients with lacunar infarcts and appear to be a marker of severity of small-vessel disease.