The study explored interactions between systemic hemodynamics and cerebral blood flow during attentional processing. Using transcranial Doppler sonography, blood flow velocities in the middle cerebral arteries (MCA) of both hemispheres were recorded while 50 subjects performed a cued reaction time task. Finger arterial pressure and heart rate were also continuously monitored. Doppler sonography...

A 13-year-old boy presenting with digital and lip cyanosis, easy fatigability, and weight gain was diagnosed to have an intrapulmonary arterio-venous fistula. During his routine follow-up examinations, there was fullness on right upper quadrant of his abdomen. Abdominal ultrasonography (USG) showed a mass in portal hilus. We planned abdominal computed (CT) to gain tomography detailed informatio...

Foils coated with specific cholesterol esters indicate differences in temperature by changes in color. When these foils are placed on the skin, the skin temperature measured is related to the perfusion provided by the vessels supplying this area of the skin. A group of 300 patients were examined simultaneously with plate thermography and directional Doppler sonography in order to detect obstruc...

Congenital neck masses in children are a relatively frequent finding. To the clinicians, they may pose various diagnostic and therapeutic dilemmas and high-resolution sonography is therefore a method of choice. Differential diagnosis of paediatric congenital neck masses primarily includes the presence of hemangioma, lymphangioma, thyreoglossal and branchial cleft cysts. The aim of this paper is...

Transvaginal color flow and pulsed Doppler sonography has shown promise in the evaluation and characterization of adnexal masses and may ultimately play a role in ovarian cancer screening.',' A relative increase in the diastolic flow in malignant lesions has been previously reported. Pathologic evidence suggests that this phenomenon reflects the paucity of smooth muscle within tumor vessels alo...

Round ligament varicosities during pregnancy are rare, and can easily be mistaken for an inguinal hernia. On physical examination, round ligament varicosities and groin hernia are difficult to distinguish. The diagnosis of round ligament varicosities can be established on gray-scale and color Doppler sonography. We experienced a case of round ligament varicosities in which a 29-year-old woman p...

BACKGROUND: A 63-year-old woman with chronic atrial fibrillation treated with warfarin was admitted to emergency for coma and complete vertical gaze palsy. Investigations: Brain CT and MRI, echo-colour Doppler sonography of the supraaortic vessels, angio-CT of the intracranial vessels, EEG, transesophageal echocardiogram, biohumoral tests. Brain CT and MRI scans showed bilateral thalamic lesion...

BACKGROUND AND PURPOSE Transcranial Doppler sonography is of established value in the detection and monitoring of middle cerebral artery vasospasm. Little information exists on the utility of transcranial Doppler for detection of posterior circulation vasospasm. METHODS Cerebral angiography and conventional hand-held transcranial Doppler sonography were compared to determine sensitivity and s...

Aim of the study To evaluate the value of uterine artery Doppler indices and waveform pattern in predicting fetuses at risk for intrauterine growth restriction in hypertensive disorders of pregnancy. Materials and methods This was a prospective cross-sectional study including 80 pregnant subjects with hypertensive disorders of pregnancy and two control groups. Uterine artery Doppler sonograph...