1/6. Crushed stents in benign left brachiocephalic vein stenoses.Two hemodialysis patients presenting with left venous arm congestion due to benign catheter-induced stenosis of the left brachiocephalic vein were treated by angioplasty and stent placement. External compression of the stents was responsible for rapid recurrence of the symptoms. No osseous or vascular malformation could be identified. Mechanical constraints induced by respiratory chest wall motion and aortic arch flow-related pulsation are proposed to explain this observation. This potential hazard should be considered when stent placement into the left brachiocephalic vein is advocated.- - - - - - - - - - ranking = 1keywords = motion (Clic here for more details about this article) |
2/6. Pseudomalignant myositis ossificans of the wrist causing compression of the ulnar nerve and artery. A case report.myositis ossificans (MO) is a condition characterised by focal, benign and self-limited idiopathic heterotopic bone formation. It is extremely rare in the hand and wrist and may lead to concomitant nerve compression. Because of the rare incidence of pseudomalignant MO at the wrist and hand, we found it of interest to report a case of this condition localised to the wrist. A 31-year-old female patient presented with swelling and pain of her left wrist. The physical examination findings, magnetic resonance imaging and Tc-99m bone scan suggested acute osteomyelitis or a tumoral condition. Incisional biopsy and pathological examination was done. The microscopic findings confirmed that the lesion was pseudomalignant MO. The lesion was removed totally and decompression of the ulnar nerve and artery was achieved. The patient regained full asymptomatic range of motion of all digits and wrist and the numbness of the fourth and fifth digits had subsided at follow-up five months later.- - - - - - - - - - ranking = 1keywords = motion (Clic here for more details about this article) |
3/6. Paradoxical ventricular septal motion with right ventricular dilatation as a manifestation of pure pressure overload due to pulmonary veno-occlusive disease.Paradoxical interventricular septal motion with right ventricular dilatation has been considered the hallmark of right ventricular volume overload. We report a 43-year-old woman with severe pulmonary hypertension due to pulmonary veno-occlusive disease who exhibited these echocardiographic abnormalities. Right ventricular volume overload was excluded by physical examination, echocardiography with saline contrast study and by cardiac catheterization, angiography, and shunt study. These echocardiographic findings are thus not pathognomonic of right ventricular volume overload and can be seen with pressure overload as well.- - - - - - - - - - ranking = 5keywords = motion (Clic here for more details about this article) |
4/6. Fast magnetic resonance in vascular diseases of the abdomen.Fast magnetic resonance (MR) imaging provides a consistent and predictable appearance of vascular abnormalities as shown by four patients with thrombi, dissection and aneurysm. Fast MR images are obtained during breath-holding, resulting in an absence of respiratory motion artifacts. The time of MR study is much less with fast MR than with spin echo sequences.- - - - - - - - - - ranking = 1keywords = motion (Clic here for more details about this article) |
5/6. Digital subtraction angiography in children.Preliminary results with digital subtraction angiography in infants and children have shown this to be an excellent screening procedure and often diagnostic. The examination can be performed satisfactorily on outpatients. Sixty patients have undergone this examination for evaluation of suspected abnormalities of the aortic arch and its branches, intracranial arteries, pulmonary arteries, abdominal aorta and its branches, and peripheral vessels. Adequate sedation is mandatory to prevent motion artifacts. While the literature reports increasing use of central venous catheters for delivery of contrast material, the use of short catheters placed in an antecubital vein is satisfactory for the pediatric patient. Techniques of the procedures are described along with seven appropriate case examples.- - - - - - - - - - ranking = 1keywords = motion (Clic here for more details about this article) |
6/6. Spiral CT. Initial experience with vascular applications.Spiral computed tomography (CT) scanning is the latest technical advance in rapid scan techniques. In spiral CT, the patient is advanced at a constant rate through a continuously rotating CT gantry. The resulting CT data represent a true volume acquisition. Because of rapid scan acquisition, optimum vascular enhancement by intravenous or intraarterial contrast can be readily achieved. In addition, high quality multiplanar and three-dimensional reconstructions can be obtained because of lack of respiratory motion. Applications of spiral CT for vascular studies include evaluation of thoracic or abdominal aneurysms, vascular occlusion from thrombus or tumor, and vascular malformations. In this article, we present vascular applications of spiral CT through a series of illustrative cases.- - - - - - - - - - ranking = 1keywords = motion (Clic here for more details about this article) |