Chordae tendineae

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Chordae tendineae
Interior of right side of heart.
The chordae tendineae are the unlabled, white tendons seen connecting the valves to the heart muscle
Latin	chordae tendineae cordis
Gray's	subject #138 532
MeSH	Chordae+Tendineae
Dorlands/Elsevier	c_31/12236883

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The chordae tendineae, or heart strings, are cord-like tendons that connect the papillary muscles to the tricuspid valve and the mitral valve in the heart.

When the right ventricle of the heart contracts, the blood pressure pushes the tricuspid valve which closes and prevents a backflow of blood into the right atrium. The chordae tendineae prevents the flaps from being everted into the right atrium. Similarly, these cord-like tendons hold in position other flaps like the bicuspid or mitral valve.

Chordae tendineae are approximately 80% collagen, while the remaining 20% is made up of elastin and endothelial cells.

External links

• SUNY Labs 20:st-0701 cvfg
• chordae+tendineae+of+heart at eMedicine Dictionary
• false+chordae+tendineae at eMedicine Dictionary
• Organology at UC Davis Circulatory/heart/chambers0/chambers11 - "Mammal heart, chambers (Gross, Low)"
• Bioweb at UWLAX Human heart model (bicuspid valve)
• Illustration at health-pictures.com

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

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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 .