The following are observations on 500 consecutive cases of coronary angiographical studies carried out on patients without any case history of myocardial ishcemia. There were 251 males and 249 females. The patients' average age was 45 years old.

The azygos vein (gr. azygos – 'unpaired') typically starts from the posterior aspect of the inferior vena cava (IVC), at or below the level of the renal veins. The origin is not constant. If present, the lumbar azygos ascends anterior to the upper lumbar vertebrae. It may pass behind the right crus of the diaphragm or pierce it, or it may traverse the aortic hiatus to the right of the cisterna ...

OBJECTIVE Anatomic structural variations of the paranasal sinuses have a practical significance during surgical procedures conducted on the sinuses by otolaryngologists. This study aims to evaluate the prevalence of clinically significant anatomical variations of the paranasal sinuses. METHODS A prospective analysis of 435 computed tomography (CT) examinations of adult Omani patients was cond...

Primary aldosteronism (PA) is currently considered the most frequent cause of secondary hypertension, with an estimated prevalence of ≈11% in hypertensive patients. Because a unilateral aldosterone-producing adenoma can be cured by adrenalectomy and bilateral hyperaldosteronism is usually treated medically, adrenal venous sampling (AVS) is necessary to provide a subtype diagnosis of PA. However...

INTRODUCTION The Circle of Willis is a vascular network formed at the base of skull in the interpeduncular fossa. Its anterior part is formed by the anterior cerebral artery, from either side. Anterior communicating artery connects the right and left anterior cerebral arteries. Posteriorly, the basilar artery divides into right and left posterior cerebral arteries and each joins to ipsilateral ...

BACKGROUND The branch anatomy of the aortic arch varies widely between individuals. These are likely due to alterations in the development of aortic arch arteries during the embryonic period. The purpose of this study is to determine the frequency of the aortic arch branch variations in the local population and provide useful data to intervention radiologists, neck and thoracic surgeons. METH...

Vascular ultrasonography has an important role in the diagnosis and management of venous disease. The venous system, however, is more complex and variable compared to the arterial system due to its frequent anatomical variations. This often becomes quite challenging for sonographers. This paper discusses the anatomy of the long saphenous vein and its anatomical variations accompanied by sonogra...

BACKGROUND The aim of this study was to determine the prevalence of the different types of median nerve thenar motor branch and to compare them with literature data. MATERIAL AND METHODS This study was conducted using median nerves dissected from cadavers stored in a 10% solution of formaldehyde at the Department of Anatomy of Jagiellonian University Medical College (JUMC) and cadavers from t...

We develop a multivariate analysis of brain anatomy to identify the relevant shape deformation patterns and quantify the shape changes that explain corresponding variations in clinical neuropsychological measures. We use kernel Partial Least Squares (PLS) and formulate a regression model in the tangent space of the manifold of diffeomorphisms characterized by deformation momenta. The scalar def...