[Measurement of left ventricular chamber and myocardial volume in hypertrophic cardiomyopathy patients by ECG-gated myocardial perfusion SPECT: application of a newly developed edge-detection algorithm].

Quantitative gated SPECT (QGS) software has been reported to demonstrate inaccurate edge detection in the left ventricular chamber in hypertrophic cardiomyopathy patients. In this study we developed a method to calculate left ventricular volume (LVV) and left myocardial volume (LMV) from gated SPECT data using a newly developed edge-detection algorithm, and we compared it with the QGS method of calculating LVV and LMV in a phantom study. Our method gave more accurate measurements LVV and LMV whereas the QGS method underestimated LMV.

Ruptured dissecting aneurysm of the vertebral artery associated with occlusive internal carotid artery dissection--case report.

A 64-year-old male presented with subarachnoid hemorrhage. Angiography showed a dissecting aneurysm of the right vertebral artery (VA), and severe stenosis of the right internal carotid artery (ICA). He was treated conservatively in the early stage.

Why do chronic subdural hematomas continue to grow slowly and not coagulate? Role of thrombomodulin in the mechanism.

Object: Thrombomodulin is a thrombin receptor on vascular endothelial cells that is highly expressed when these cells are injured, and it has anticoagulating activity. The authors investigated thrombomodulin expression to clarify why chronic subdural hematomas (CSDHs) continue to grow slowly, like a tumor, and are liquefied.

Methods: Burr hole craniotomy and drainage were performed in all 35 patients with CSDH who were included in the study.

Spontaneous occlusion of ruptured vertebral artery dissection at the extradural fenestration associated with extradural origin of the posterior inferior cerebellar artery--case report.

A 69-year-old female suffered from sudden onset of severe headache. Computed tomography showed subarachnoid hemorrhage primarily located in the posterior fossa. Initial angiography demonstrated a fenestration of the vertebral artery and an extracranial origin of the posterior inferior cerebellar artery.

Late hemorrhage from persistent pseudoaneurysm in vertebral artery dissection presenting with ischemia: case report.

Background: Vertebral artery dissection lesions tend to resolve spontaneously, but abnormal findings such as aneurysmal-dilatation occasionally persist. However, the clinical features and pathological findings in such cases have never been verified.

Case Description: A 62-year-old man presented with left cerebellar infarction.