Right atrium

(Redirected from Right atrial)
Jump to navigation Jump to search

Template:Infobox Anatomy

WikiDoc Resources for Right atrium

Articles

Most recent articles on Right atrium

Most cited articles on Right atrium

Review articles on Right atrium

Articles on Right atrium in N Eng J Med, Lancet, BMJ

Media

Powerpoint slides on Right atrium

Images of Right atrium

Photos of Right atrium

Podcasts & MP3s on Right atrium

Videos on Right atrium

Evidence Based Medicine

Cochrane Collaboration on Right atrium

Bandolier on Right atrium

TRIP on Right atrium

Clinical Trials

Ongoing Trials on Right atrium at Clinical Trials.gov

Trial results on Right atrium

Clinical Trials on Right atrium at Google

Guidelines / Policies / Govt

US National Guidelines Clearinghouse on Right atrium

NICE Guidance on Right atrium

NHS PRODIGY Guidance

FDA on Right atrium

CDC on Right atrium

Books

Books on Right atrium

News

Right atrium in the news

Be alerted to news on Right atrium

News trends on Right atrium

Commentary

Blogs on Right atrium

Definitions

Definitions of Right atrium

Patient Resources / Community

Patient resources on Right atrium

Discussion groups on Right atrium

Patient Handouts on Right atrium

Directions to Hospitals Treating Right atrium

Risk calculators and risk factors for Right atrium

Healthcare Provider Resources

Symptoms of Right atrium

Causes & Risk Factors for Right atrium

Diagnostic studies for Right atrium

Treatment of Right atrium

Continuing Medical Education (CME)

CME Programs on Right atrium

International

Right atrium en Espanol

Right atrium en Francais

Business

Right atrium in the Marketplace

Patents on Right atrium

Experimental / Informatics

List of terms related to Right atrium

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


Overview

The right atrium (in older texts termed the right auricle) is one of four chambers (two atria and two ventricles) in the human heart. It receives de-oxygenated blood from the superior and inferior vena cavae and the coronary sinus, and pumps it into the right ventricle through the tricuspid valve.

The sinoatrial node (SAN) is located within this chamber next to the vena cava. This is a group of pacemaker cells which spontaneously depolarise to create an action potential. The cardiac action potential then spreads across both atria causing them to contract forcing the blood they hold into their corresponding ventricles.

In early life, when a fetus is in the womb, the right atrium has a hole within its septum through to the left atrium, this makes them continuous with each other which is essential for fetal circulation. This junction is called the foramen ovale. Once born (usually within a year's time) the foreman ovale seals over and it is renamed as the fossa ovalis. The fossa ovalis is seen as an embryonic remnant. In some cases, the formane ovale fails to close and is present in 20% of the general population, however it does not cause problems in the vast majority. This is known as patent foramen ovale.

Within the fetal right atrium, blood from the inferior vena cava and the superior vena flow in separate streams to different locations in the heart, and this has been reported to occur through the Coanda effect.[1]

The right atrium also holds the coronary sinus which is the opening of the vein that drains the myocardium itself. Attached to the right atrium is the right auricular appendix.


Additional images

See also


References

  1. Ashrafian H. The Coanda effect and preferential right atrial streaming. Chest. 2006 Jul;130(1):300.

ta:வலது ஏட்ரியம்


Template:WikiDoc Sources