Walter S. Tan

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Pulmonary veins (PVs) are the target of ablation procedures to cure paroxysmal atrial fibrillation (PAF). There are few anatomic and histological studies of PVs. Sixteen human hearts were obtained from autopsies performed at our hospital and cadavers from a local medical school. The anatomic relationship between the PVs and the left atrium (LA) was(More)
UNLABELLED We conducted a prospective, randomized study comparing transcatheter partial splenic embolization (PSE) with splenectomy (SX) in 53 renal transplant candidates. An additional 112 PSE procedures were performed for various indications in 101 patients. STUDY RESULTS A mean +/- SD of 65% +/- 16% of splenic mass was ablated in the PSE group. The(More)
An 18-year-old woman suffered from throbbing occipital headaches for about 11 months before hospitalization. The headaches were initially considered by her fami ly physician to result from migraine and/or sinusitis. The patient noted that the headaches worsened and began to extend to the right temporoparietal area about 6 months before admission, at which(More)
A patient harboring a cerebral arteriovenous malformation (AVM) underwent angiography in an attempt to embolize the AVM. During catheterization (and prior to embolization) he became hemiplegic and aphasic. Angiography revealed a complete middle cerebral artery (MCA) occlusion by an embolus. The patient was treated with recombinant tissue plasminogen(More)
Brain death results when irreversible intracranial circulatory arrest, involving both the internal carotid and intracranial vertebral basilar systems, occurs despite preservation of extracranial circulation . To document the absence of intracranial blood flow and establish the irreversibility of the condition, intraarterial cerebral angiography and(More)
Enterolith in the Roux limb of Roux-en-Y hepaticojejunostomy is rare. We report a case of a Roux loop enterolith presenting with recurrent cholangitis. Cholescintigraphy and magnetic resonance imaging aided in the preoperative diagnosis. Intraoperatively, a large enterolith was extracted distal to the biliodigestive anastomosis. A kink of the small bowel(More)
Six patients with beta-thalassemia major underwent partial splenic embolization as an alternative to splenectomy. One patient required 2 embolizations. All 6 patients showed a marked reduction in transfusion requirements. Transfusion requirements fell to a level within that reported by other authors following total splenectomy, although significantly above(More)
The magnetic resonance imaging (MRI) and computed tomography (CT) findings in 9 patients with hemorrhagic choroidal detachment, serous choroidal detachment and/or ocular hypotony, choroidal effusion and 6 patients with exudative retinal detachment are described. Subacute hemorrhagic choroidal detachment appeared as moderately hyperintense image in T1(More)