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2013, Number 4

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Med Sur 2013; 20 (4)

Incidence and MRI patterns of acute ischemic stroke at a quaternary care hospital in Mexico City

López-Mejía M, Yeverino-Suárez P, Roldán-Valadez E

Language: English
References: 25
Page: 200-207
PDF size: 236.89 Kb.


ABSTRACT

Introduction. Stroke is a rapidly neurological deficit with a high mortality rate and can induce long-term disability. MRI is a fundamental image tool for ischemic stroke diagnosis. There is still scarce information about the stroke incidence and its MRI patterns in specialized centers in Latin America. Material and methods. Retrospective study of patients with clinical diagnosis of stroke on admission at the Emergency Room with brain MRI confirmation. Patients were recruited from January 2011 to December 2012. Results. 238 patients were admitted with symptoms of stroke, 124 underwent brain MRI with 76 confirmations. The age distribution was 42 men (65.38 ± 15.85 years; range 33-91 years) and 34 women (69.47 ± 12.08 years, range 31-89 years). We found a crude annual incidence rate of 119.84 per 100,000 cases of acute ischemic stroke with a male to female ratio of 1.2:1, with 64% of patients included in the 65-74 and 75-84 age groups. We confirmed previously reported MRI patterns: middle cerebral artery was the most commonly affected one with 69.74% (χ2 = 104.216, p ‹ 0.001); decreased flow was more common than vessel occlusion (47.37 vs. 30.26%); 71.62% of cases had ‹ 1/3 involvement of arterial territory (χ2 = 73.324, p‹ 0.001). Small infarcts (‹ 70 cm3) accounted for 71.23% of cases (χ2 = 13.164, p ‹ 0.001). Conclusion. The incidence rate in our center is lower than some developed countries, higher rates can reflect an improvement in awareness of people about stroke; information about MRI patterns in specialized facilities could help in tailoring thrombolytic strategies for selected patients.


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