common carotid artery

In human anatomy, the carotid sinus is a localized dilation of the internal carotid artery at its origin, the common carotid artery bifurcation. It contains numerous baroreceptors, which function as a "sampling area" for many homeostatic mechanisms for maintaining blood pressure. Carotid sinus - Carotid sinus massage. Massage of the carotid sinus, or carotid sinus massage, is used to diagnose carotid sinus syncope and is sometimes useful for differentiating supraventricular tachycardia (SVT) from ven ...

Including:

• Carotid sinus - Carotid sinus massage
• Carotid sinus - Disease of the carotid sinus

Read more here: » Carotid sinus: Encyclopedia - Carotid sinus

The largest artery in the human body, the aorta originates from the left ventricle of the heart and brings oxygenated blood to all parts of the body in the systemic circulation. Aorta - The course of the aorta. The aorta is usually divided into several segments. The portion above the diaphragm (in the thorax) is called the thoracic aorta and is sometimes further subdivided into the ascending aorta, aortic arch and descending (thoracic) aorta. The portion below the diaphragm (in t ...

Including:

• Aorta - The course of the aorta
• Aorta - Thoracic aorta
• Aorta - Abdominal aorta
• Aorta - Features
• Aorta - Diseases

Read more here: » Aorta: Encyclopedia - Aorta

The paragangliomas appear grossly as sharply circumscribed polypoid masses and they have a firm to rubbery consistency. They are highly vascular tumors and may have a deep red color. On microscopic inspection, the tumor cells are readily recognized. Individual tumor cells are polygonal to oval and are arranged in distinctive cell balls, called Zellballen. These cell balls are separated by fibrovascular stroma and surrounded by sustenacular cells. By light microscopy, the differential diagnosis includes related neuroendocrine tumors, such as carcinoid tumor, neuroendocrine carcinoma, and medullary carcinoma of the t ...

See also:

Paraganglioma, Paraganglioma - Inheritance, Paraganglioma - Pathology, Paraganglioma - Clinical characteristics, Paraganglioma - Imaging, Paraganglioma - Treatment

Read more here: » Paraganglioma: Encyclopedia II - Paraganglioma - Pathology

The aorta is usually divided into several segments. The portion above the diaphragm (in the thorax) is called the thoracic aorta and is sometimes further subdivided into the ascending aorta, aortic arch and descending (thoracic) aorta. The portion below the diaphragm (in the abdomen) is known as the abdominal aorta. Aorta - Thoracic aorta. The initial part of the aorta, the ascending aorta, rises out of the left ventricle, from which it is separated by the aortic valve. The two coronary arteries of the heart arise from the aorti ...

See also:

Aorta, Aorta - The course of the aorta, Aorta - Thoracic aorta, Aorta - Abdominal aorta, Aorta - Features, Aorta - Diseases

Read more here: » Aorta: Encyclopedia II - Aorta - The course of the aorta

A classical method for quantifying the JVP was described by Borst & Molhuysen in 1952. It has since been modified in various ways. The patient is positioned under 45°, and the filling level of the jugular vein determined. In healthy people, it is maximum several (3-4) centimetres above the sternal angle. Some doctors employ a venous arc, an instrument to measure the JVP more accurately. A pen-light can aid in discerning the jugular filling level. The JVP is elevated in venous hypertension (e.g. right-sided heart failure) and parad ...

See also:

Jugular venous pressure, Jugular venous pressure - Method, Jugular venous pressure - Differentiation of the JVP from the carotid pulse, Jugular venous pressure - Reference

Read more here: » Jugular venous pressure: Encyclopedia II - Jugular venous pressure - Method

Paragangiomas are described by their site of origin and are often given special names: Carotid paraganglioma (carotid body tumor) Is the most common of the head and neck paragangliomas. It usually presents as a painless neck mass, but larger tumors may cause cranial nerve palsies, usually of the vagus nerve and hypoglossal nerve. Glomus tympanicum Glomus jugulare Both commonly present as a middle ear mass resulting in tinnitus (in 80%) and hearing loss (in 60%). The cranial nerves of the jugular foramen may be compressed, resulting ...

See also:

Paraganglioma, Paraganglioma - Inheritance, Paraganglioma - Pathology, Paraganglioma - Clinical characteristics, Paraganglioma - Imaging, Paraganglioma - Treatment

Read more here: » Paraganglioma: Encyclopedia II - Paraganglioma - Clinical characteristics