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Your search keyword '"Ultrasonografía Doppler transcraneal"' showing total 2 results
Start Over Descriptor "Ultrasonografía Doppler transcraneal" Topic magnetic resonance imaging
2 results on '"Ultrasonografía Doppler transcraneal"'

1. Utilidad del Doppler transcraneal en el diagnóstico de la estenosis arterial intracraneal: presentación de un caso.

Author

Enrique Scherle Matamoros, Claudio, Fernández Cue, Leda, and Luis Miranda Hernández, José

Subjects
*ARTERIAL stenosis, *INTRACRANIAL arterial diseases, *ATHEROSCLEROSIS, *MAGNETIC resonance imaging, *DOPPLER ultrasonography
Abstract

Introduction: The intracranial Atherosclerosis disease represents a frequent cause of ischemic stroke in which the study with transcranial Doppler constitutes an important tool for the diagnosis. Case report: Male of 39 years old referred to consultation with a history of stroke of uncertain cause. The rmagnetic resonance image demonstrated a left striatum-capsular infarction. The transcranial Doppler showed a focal increase of the flow rates compatible with a stenosis in the proximal segment of left middle cerebral artery that was demonstrated later in the computed tomography angiography. This case don't have another embolic source (arterial or cardiac) and have some vascular risk factors (hypertension, and increase of serum triglycerides). Five month later the changes in the flow blood velocity persisted in transcranial Doppler ultrasound. Conclusions: In this case, the transcranial Doppler and Transcranial Color Doppler Sonography allowed a reliable diagnosis of intracraneal stenosis. The persistence of hemodynamic changes and the exclusion of other causes of intracranial stenosis suggest the atherosclerotic cause. [ABSTRACT FROM AUTHOR]

Published
2013

2. Análisis de las lesiones encefálicas en resonancia magnética en pacientes con señales transitorias de alta intensidad detectadas por Doppler transcraneal

Author

Surur, Alberto, Pessini Ferreira, Lucas M, Galíndez, Jorge A., and Martín, Juan J.

Subjects
patent foramen ovale, transcranial Doppler ultrasonography, magnetic resonance imaging, ultrasonografía Doppler transcraneal, foramen oval permeable, imagen por resonancia magnética
Abstract

Resumen Objetivo: Describir los hallazgos en resonancia magnética (RM) de encéfalo en pacientes menores de 65 años que fueron estudiados por Doppler transcraneal (DTC) con contraste de microburbujas, con antecedentes de accidente cerebrovascular (ACV) criptogénico y sospecha de foramen oval permeable (FOP). Materiales y métodos: Este estudio transversal retrospectivo incluyó pacientes de ambos sexos, menores de 65 años. Resultados: Nuestra muestra (n = 47, 47% masculino y 53% femenino, edad media de 42 años) presentó señales transitorias de alta intensidad (HITS, por su sigla en inglés) positivo en el 61,7% y HITS-negativo en el 38,3%. En pacientes HITS-positivo, predominaron las lesiones a nivel de las fibras en U subcorticales, únicas o múltiples con distribución bilateralmente simétrica. En pacientes con HITS moderados, predominaron las lesiones en el territorio vascular de la circulación posterior. Conclusión: En pacientes menores de 65 años con ACV criptogénico y lesiones en fibras en U subcorticales, únicas o múltiples con distribución bilateral y simétrica, debe tenerse en cuenta un FOP como posible causa de dichas lesiones. Abstract Objectives: To analyze the findings on brain magnetic resonance imaging (MRI) in patients less than 65 years of age with history of cryptogenic stroke and suspected patent foramen ovale (PFO) who were studied with Contrast-Transcranial Doppler. Materials and Methods: This transversal retrospective study included both, men and women less than 65 years of age. Results: Our sample (n = 47, 47% male and 53% female, average age 42 years old) had High Intensity Transient Signals (HITS)-positive in 61.7% and HITS-negative in 38.3%. In HITS-positive patients, lesions were predominantly located on the subcortical U fibers, lone or multiple bilateral symmetric distributions. In patients with moderate-severity HITS, the posterior circulation was the most affected. Conclusion: In patients less than 65 years of age with cryptogenic stroke with lesions affecting the subcortical U fibers, with unique or multiple bilateral symmetric distributions, a PFO should be considered as an underlying cause.

Published
2019

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