نتایج جستجو برای: transcranial doppler sonography tcd
تعداد نتایج: 64588 فیلتر نتایج به سال:
OBJECTIVES Transesophageal echocardiography (TEE) is usually recommended in the evaluation of the patent foramen ovale (PFO). Our goal is to confirm the efficacy of contrast-enhanced transcranial Doppler (ce-TCD) in detecting residual significant right-to-left shunts (RLS) after PFO percutaneous closure. MATERIALS AND METHODS Sixty-eight patients with a previous transient ischemic attack, str...
PURPOSE OF REVIEW To present the practical aspects of transcranial Doppler (TCD) and provide evidence supporting its use for the management of traumatic brain injury (TBI) patients. RECENT FINDINGS TCD measures systolic, mean, and diastolic cerebral blood flow (CBF) velocities and calculates the pulsatility index from basal intracranial arteries. These variables reflect the brain circulation,...
Objective This study aimed to explore the application value of transcranial doppler (TCD) in the inspection of cerebral vasospasm (CVS) after the treatment of intracranial aneurysm. METHODS 105 cases of patients with confirmed intracranial aneurysm were divided into two groups based on the two different treatments - craniotomy and aneurysmal clipping or interventional emboli-zation therapy. T...
Cranioplasty can improve neurological status in patients with skull bone defects. The mechanism of postoperative improvement in neurologic status might be increased cerebral blood flow (CBF) velocity due to elimination of the effects of atmospheric pressure. Between May 2001 and June 2002, 13 patients (8 men and 5 women; average age, 46 years; range, 21-65 years) were studied. Postoperative cha...
Abstract Transcranial Doppler (TCD) blood flow velocity has been extensively used in biomedical research as it provides a cost-effective and relatively simple approach to assess changes cerebral dynamics track cerebrovascular health status. In this article we introduce new TCD-based timing index, TITCD, an indicator of vascular stiffening health. We investigate the correlati...
Background—For children with sickle cell anaemia and elevated transcranial Doppler (TCD) flow velocities, regular blood transfusions effectively prevent primary stroke, but must be continued indefinitely. The efficacy of hydroxyurea in this setting is unknown. Ware et al. Page 2 Lancet. Author manuscript; available in PMC 2017 December 11. A uhor M anscript
RCVS: Reversible Cerebral Vasoconstriction Syndrome; rtPA: recombinant tissue Plasminogen Activator; GCS: Glasgow Coma Scale; CT: Computed Tomography; ICH: Intracerebral Hemorrhage; MRI: Magnetic Resonance Imaging; MRR: MR Renography; ACA: Anterior Cerebral Artery; MIS: Minimally Invasive Surgery; TCD: Transcranial Doppler; ICU: Intensive Care Unit; MISTIE: Minimally Invasive Surgery plus rt-PA...
BACKGROUND AND PURPOSE Reduction of cerebral blood flow and vasomotor reactivity (VMR) are thought to play an important role in the pathogenesis of cerebral microangiopathy. The aim of our study was to determine whether near-infrared spectroscopy (NIRS) can detect a reduced VMR in patients with microangiopathy, whether NIRS reactivities correlate with VMR assessed by transcranial Doppler sonogr...
BACKGROUND Diagnosis of brain death relies on clinical and electroencephalographic (EEG) criteria. Waiting for 24 hours is mandatory to make definitive diagnosis of the condition in the Iranian protocol. Although it has been previously shown that oscillatory or spiked systolic or reversed diastolic flow patterns in transcranial Doppler sonography (TCD) are associated with faster brain death con...
BACKGROUND Genetic factors play an important role in the pathogenesis of moyamoya disease (MMD). Previous studies concentrated on familial MMD patients. In this study, we focused on family members of sporadic MMD patients, and aimed to gain a clearer understanding of the role that genetic factors play in MMD. METHODS The immediate family members of MMD patients were initially screened by tran...
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