Transcraneal Doppler

Foramen Oval Permeable, un Diagnóstico Posible en Manos del Neurólogo. Descripción de Caso. Patent Foramen Ovale, A Possible Diagnosis From The Neurologist. Case Report.

Introduction: A high prevalence of atrial septal defects is reported in patients with cryptogenic ischemic stroke, also related to an increase of the risk of recurrence. Objective: To report case of a young patient with a history of diabetes mellitus and ischemic stroke without arterial changes proven. A transcraneal Doppler study with a bubble test helped to diagnose a patent foramen ovale. Conclusion: As part of the initial evaluation of this patient, a TCD study has helped to clarify the stroke etiology. The demonstration of a patent foramen ovale has implications fo r the secondary prevention of stroke.

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Palabras clave: Doppler transcraneal, Foramen Oval permeable, Ictus criptogénico,

Keywords: Cryptogenic Stroke, Patent Foramen Ovale, Transcraneal Doppler,

Síndrome de Guillain Barré imitando Muerte Encefálica.

Guillain Barré Syndrome is a neurological disease frequently admitted to the Intensive Care Unit, especially if there is associated hemodynamic or ventilatory compromise. Brain death is the irreversible cessation of all functions of Central Nervous System, and rarely, Guillain Barré Syndrome can mimick it, with subsequent recovery in the next few days or weeks. We report a case admitted to the Intensive Care Unit, with this type of evolution.

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Palabras clave: Doppler transcraneal, Guillain Barré, Muerte encefálica, polineuropatía,

Keywords: Brain death, Guillain Barre, polyneuropathy, Transcraneal Doppler,

Utilidad del doppler transcraneal en la evaluación del stroke criptogénico.

Cryptogenic stroke accounts for 40% of patients with ischemic stroke and it is considered that in which after conducting a thorough investigation, a cause cannot be determined. For several years there has been a close association between cryptogenic stroke and paradoxical embolism through right-to-left shunt, which occurred specially in patients with patent foramen ovale (PFO), whose prevalence is significantly higher in patients with cryptogenic stroke than in patients with stroke of a definite cause. The study of this type of cardiac abnormalities has been strengthened today with the advent of new technologies including transesophageal echocardiography (TEE) which remains the gold standard in the diagnosis of PFO, however, there are increasing reports of the usefulness of transcraneal doppler in the evaluation of these patients in a way that makes its recommendation comparable to TEE. This review is intended to expand the knowledge available on this specific procedure according to the current existing evidence.

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Palabras clave: Doppler transcraneal, Ecocardiograma Transesofágico, Foramen Ovale Permeable, Stroke Criptogénico,

Keywords: Cryptogenic Stroke, Patent Foramen Ovale, Transcraneal Doppler, Transesophageal Echocardiography,

Síndrome de Moyamoya en un niño con Drepanocitosis.

Sickle cell disease is one of the main causes of ischemic stroke in the childhood, generally related with stenosis of the arteries of the anterior carotid circulation. We present the results of the studies carried out in a patient with sickle cell with no history of stroke, in treatment with hidroxyurea. Transcraneal Doppler and Magnetic Resonance Imaging demonstrated the existence of stenosis in medial cerebral arteries and a Moyamoya pattern in the cerebral circulation with hemodynamic ischemic lesions.