Left auricular appendix

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Left auricular appendix
Heart seen from above. (Left auricula labeled at bottom left.)
Section of the heart showing the ventricular septum. (Left auricula labeled at upper right.)
Latin	auricula sinistra
Gray's	subject #138 533
Dorlands/Elsevier	a_73/12169673

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Powerpoint slides on Left auricular appendix Images of Left auricular appendix Photos of Left auricular appendix Podcasts & MP3s on Left auricular appendix Videos on Left auricular appendix
Evidence Based Medicine
Cochrane Collaboration on Left auricular appendix Bandolier on Left auricular appendix TRIP on Left auricular appendix
Clinical Trials
Ongoing Trials on Left auricular appendix at Clinical Trials.gov Trial results on Left auricular appendix Clinical Trials on Left auricular appendix at Google
Guidelines / Policies / Govt
US National Guidelines Clearinghouse on Left auricular appendix NICE Guidance on Left auricular appendix NHS PRODIGY Guidance FDA on Left auricular appendix CDC on Left auricular appendix
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News
Left auricular appendix in the news Be alerted to news on Left auricular appendix News trends on Left auricular appendix
Commentary
Blogs on Left auricular appendix
Definitions
Definitions of Left auricular appendix
Patient Resources / Community
Patient resources on Left auricular appendix Discussion groups on Left auricular appendix Patient Handouts on Left auricular appendix Directions to Hospitals Treating Left auricular appendix Risk calculators and risk factors for Left auricular appendix
Healthcare Provider Resources
Symptoms of Left auricular appendix Causes & Risk Factors for Left auricular appendix Diagnostic studies for Left auricular appendix Treatment of Left auricular appendix
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Left auricular appendix en Espanol Left auricular appendix en Francais
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List of terms related to Left auricular appendix

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Overview

The left auricular appendix (left auricula, left auricle, left atrial appendage) is a conical muscular pouch connected to the left atrium of the heart. It is somewhat constricted at its junction with the principal cavity; it is longer, narrower, and more curved than the right auricular appendix, and its margins are more deeply indented.

It is directed forward and toward the right and overlaps the root of the pulmonary artery.

In older texts, the term "left auricle" was often used to describe the structure now known as the left atrium.

In atrial fibrillation, thrombi are thought to arise from the left auricle, which may lead to ischaemic damage to the brain, kidneys, or other organs supplied by the systemic circulation.

Functions as a reservoir for the left ventricle.

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.

v • d • e Anatomy of torso, cardiovascular system: heart
Structures	atria (interatrial septum, musculi pectinati) • ventricles (interventricular septum, trabeculae carneae, chordae tendinae, papillary muscle) • valves • cusps
Regions	base • apex • grooves (coronary/atrioventricular, interatrial, anterior interventricula, posterior interventricular) • surfaces (sternocostal, diaphragmatic) • borders (right, left)
Right heart	(vena cavae, coronary sinus) → right atrium (auricle, fossa ovalis, limbus of fossa ovalis, crista terminalis, valve of the inferior vena cava, valve of the coronary sinus) → tricuspid valve → right ventricle (conus arteriosus, moderator band/septomarginal trabecula)  → pulmonary valve → (pulmonary artery and pulmonary circulation)
Left heart	(pulmonary veins) → left atrium (auricle) → mitral valve → left ventricle → aortic valve (aortic sinus) → (aorta and systemic circulation)
Layers	pericardium: fibrous pericardium • serous pericardium (pericardial cavity, epicardium/visceral layer) • pericardial sinus myocardium • endocardium • cardiac skeleton (fibrous trigone, fibrous rings)
Conduction system	Cardiac pacemaker • SA node • AV node• bundle of His • Purkinje fibers

v • d • e WikiDoc Research Resources for Left auricular appendix (Click show to right to view)
Articles on Left auricular appendix	Most recent articles on Left auricular appendix • Most cited articles on Left auricular appendix • Review articles on Left auricular appendix • Articles on Left auricular appendix in N Eng J Med, Lancet, BMJ
Media (Slides, Video, Images, MP3) on Left auricular appendix	Powerpoint slides on Left auricular appendix • Images of Left auricular appendix • Photos of Left auricular appendix • Podcasts & MP3s on Left auricular appendix • Videos on Left auricular appendix
Evidence Based Medicine Regarding Left auricular appendix	Cochrane Collaboration on Left auricular appendix • Bandolier on Left auricular appendix • TRIP on Left auricular appendix
Cost Effectiveness of Left auricular appendix	Cost Effectiveness of Left auricular appendix
Clinical Trials Involving Left auricular appendix	Ongoing Trials on Left auricular appendix at Clinical Trials.gov • Trial results on Left auricular appendix • Clinical Trials on Left auricular appendix at Google
Guidelines / Policies / Government Resources (FDA/CDC) Regarding Left auricular appendix	US National Guidelines Clearinghouse on Left auricular appendix • NICE Guidance on Left auricular appendix • NHS PRODIGY Guidance • FDA on Left auricular appendix • CDC on Left auricular appendix
Textbook Information on Left auricular appendix	Books and Textbook Information on Left auricular appendix
Pharmacology Resources on Left auricular appendix	Dosing of Left auricular appendix • Drug interactions with Left auricular appendix • Side effects of Left auricular appendix • Allergic reactions to Left auricular appendix • Overdose information on Left auricular appendix • Carcinogenicity information on Left auricular appendix • Left auricular appendix in pregnancy • Pharmacokinetics of Left auricular appendix •
Genetics, Pharmacogenomics, and Proteinomics of Left auricular appendix	Genetics of Left auricular appendix • Pharmacogenomics of Left auricular appendix • Proteomics of Left auricular appendix
Newstories on Left auricular appendix	Left auricular appendix in the news • Be alerted to news on Left auricular appendix • News trends on Left auricular appendix
Commentary on Left auricular appendix	Blogs on Left auricular appendix
Patient Resources on Left auricular appendix	Patient resources on Left auricular appendix • Discussion groups on Left auricular appendix • Patient Handouts on Left auricular appendix • Directions to Hospitals Treating Left auricular appendix • Risk calculators and risk factors for Left auricular appendix
Healthcare Provider Resources on Left auricular appendix	Symptoms of Left auricular appendix • Causes & Risk Factors for Left auricular appendix • Diagnostic studies for Left auricular appendix • Treatment of Left auricular appendix
Continuing Medical Education (CME) Programs on Left auricular appendix	CME Programs on Left auricular appendix
International Resources on Left auricular appendix	Left auricular appendix en Espanol • Left auricular appendix en Francais
Business Resources on Left auricular appendix	Left auricular appendix in the Marketplace • Patents on Left auricular appendix
Informatics Resources on Left auricular appendix	List of terms related to Left auricular appendix

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Acknowledgement and Attribution Regarding Sources of Content

Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .