Fibrous rings of heart

Jump to: navigation, search
Fibrous rings of heart
Latin anulus fibrosus dexter cordis, anulus fibrosus sinister cordis
Gray's subject #138 536
Dorlands/Elsevier a_50/12143716

WikiDoc Resources for Fibrous rings of heart

Articles

Most recent articles on Fibrous rings of heart

Most cited articles on Fibrous rings of heart

Review articles on Fibrous rings of heart

Articles on Fibrous rings of heart in N Eng J Med, Lancet, BMJ

Media

Powerpoint slides on Fibrous rings of heart

Images of Fibrous rings of heart

Photos of Fibrous rings of heart

Podcasts & MP3s on Fibrous rings of heart

Videos on Fibrous rings of heart

Evidence Based Medicine

Cochrane Collaboration on Fibrous rings of heart

Bandolier on Fibrous rings of heart

TRIP on Fibrous rings of heart

Clinical Trials

Ongoing Trials on Fibrous rings of heart at Clinical Trials.gov

Trial results on Fibrous rings of heart

Clinical Trials on Fibrous rings of heart at Google

Guidelines / Policies / Govt

US National Guidelines Clearinghouse on Fibrous rings of heart

NICE Guidance on Fibrous rings of heart

NHS PRODIGY Guidance

FDA on Fibrous rings of heart

CDC on Fibrous rings of heart

Books

Books on Fibrous rings of heart

News

Fibrous rings of heart in the news

Be alerted to news on Fibrous rings of heart

News trends on Fibrous rings of heart

Commentary

Blogs on Fibrous rings of heart

Definitions

Definitions of Fibrous rings of heart

Patient Resources / Community

Patient resources on Fibrous rings of heart

Discussion groups on Fibrous rings of heart

Patient Handouts on Fibrous rings of heart

Directions to Hospitals Treating Fibrous rings of heart

Risk calculators and risk factors for Fibrous rings of heart

Healthcare Provider Resources

Symptoms of Fibrous rings of heart

Causes & Risk Factors for Fibrous rings of heart

Diagnostic studies for Fibrous rings of heart

Treatment of Fibrous rings of heart

Continuing Medical Education (CME)

CME Programs on Fibrous rings of heart

International

Fibrous rings of heart en Espanol

Fibrous rings of heart en Francais

Business

Fibrous rings of heart in the Marketplace

Patents on Fibrous rings of heart

Experimental / Informatics

List of terms related to Fibrous rings of heart

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]


The right and left fibrous rings of heart (anulus fibrosus cordis) surround the atrioventricular and arterial orifices, and are stronger upon the left than on the right side of the heart. The right fibrous ring is known as the anulus fibrosus dexter cordis, and the left is known as the anulus fibrosus sinister cordis.

The atrioventricular rings serve for the attachment of the muscular fibers of the atria and ventricles, and for the attachment of the bicuspid and tricuspid valves.

The left atrioventricular ring is closely connected, by its right margin, with the aortic arterial ring; between these and the right atrioventricular ring is a triangular mass of fibrous tissue, the trigonum fibrosum, which represents the os cordis seen in the heart of some of the larger animals, as the ox and elephant.

Lastly, there is the tendinous band, already referred to, the posterior surface of the conus arteriosus.

The fibrous rings surrounding the arterial orifices serve for the attachment of the great vessels and semilunar valves.

Each ring receives, by its ventricular margin, the attachment of some of the muscular fibers of the ventricles; its opposite margin presents three deep semicircular notches, to which the middle coat of the artery is firmly fixed.

The attachment of the artery to its fibrous ring is strengthened by the external coat and serous membrane externally, and by the endocardium internally.

From the margins of the semicircular notches the fibrous structure of the ring is continued into the segments of the valves.

The middle coat of the artery in this situation is thin, and the vessel is dilated to form the sinuses of the aorta and pulmonary artery.

See also

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.



Linked-in.jpg