Junctional rhythm

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During junctional rhythm, the HIS bundle initiates electrical activity in the heart. This causes the atria and ventricles to be electrically activated at the same time.

In contrast, sinus rhythm initiates in the Sinus node and activates the atria then progresses into the HIS bundle, down the Purkinje fibers and up the ventrical. This causes the atria to contract before the ventricals.

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

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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 .