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{{Atrial septal defect}}
__NOTOC__
{{CMG}}; '''Associate Editors-In-Chief:''' [[Priyamvada Singh|Priyamvada Singh, M.B.B.S.]] [[mailto:psingh@perfuse.org]]; {{CZ}}'''; Assistant Editor-In-Chief:''' [[Kristin Feeney|Kristin Feeney, B.S.]] [[mailto:kfeeney@perfuse.org]]
{{Atrial septal defect ostium secundum}}
'''For full discussion on atrial septal defects click [[atrial septal defect|here]].'''


==Overview==
{{CMG}}; '''Associate Editor(s)-In-Chief:''' [[Priyamvada Singh|Priyamvada Singh, M.B.B.S.]] [mailto:psingh13579@gmail.com];  '''Assistant Editor(s)-In-Chief:''' [[Kristin Feeney|Kristin Feeney, B.S.]] [mailto:kfeeney@elon.edu]
During fetal development, the septal wall may fail to fuse causing an atrial septal defect to arise. An ostium secundum atrial septal defect is one such type of malformation arising from the irregular development of the foramen ovale, septum secundum or septum primum. It is the most common type of atrial septal defect.


== Image showing ostium secundum atrial septal defect==
==[[Atrial septal defect ostium secundum overview|Overview]]==


[[Image:Gray467.png|left|450px|Interior of dorsal half of [[heart]] of human [[embryo]] of about thirty-five days. (Septum secundum visible at center top.)]]
==[[Atrial septal defect ostium secundum anatomy|Anatomy]]==


[[Image:Gray468.png|center|400px|Same heart as above, opened on right side. (Septum secundum visible in dark area at center top.)]]
==[[Atrial septal defect ostium secundum pathophysiology|Pathophysiology]]==


==[[Atrial septal defect ostium secundum epidemiology and demographics|Epidemiology and Demographics]]==


==Ostium Secundum Atrial Septal Defect==
==[[Atrial septal defect ostium secundum natural history|Natural History, Complications and Prognosis]]==


* The '''septum secundum''' is '''semilunar''' in shape. It grows downward from the upper wall of the [[Atrium (heart)|atrium]] immediately to the right of the [[primary septum]] and [[foramen ovale]]. Shortly after birth it fuses with the [[primary septum]], and by this means the [[foramen ovale]] is closed, but sometimes the fusion is incomplete and the upper part of the foramen remains patent. The [[limbus fossae ovalis]] denotes the free margin of the septum secundum. The ostium secundum (or foramen secundum) is a foramen in the [[septum primum]]. It should not be confused with the [[Foramen ovale (heart)|foramen ovale]], which is a foramen in the [[septum secundum]]. It can arises from an '''enlarged foramen ovale''', '''inadequate growth of the septum secundum''', or '''excessive absorption of the septum.
==[[Atrial septal defect ostium secundum diagnosis | Diagnosis]]==


* Most of the times it occur sporadically. However, they have been found to occur with increased incidences in some genetic disorders like, the '''Holt-Oram (heart-hand) syndrome''', '''[[Down syndrome]]''', [[Noonan syndrome]],'''Treacher Collins syndrome''', and the '''thrombocytopenia-absent radii (TAR) syndrome'''.
[[Atrial septal defect ostium secundum history and symptoms|History and Symptoms]] | [[Atrial septal defect ostium secundum physical examination|Physical Examination]] | [[Atrial septal defect ostium secundum chest x ray|Chest X Ray]] | [[Atrial septal defect ostium secundum electrocardiogram|Electrocardigram]] | [[Atrial septal defect ostium secundum echocardiography|Echocardiography]] | [[Atrial septal defect ostium secundum other diagnostic studies|Other Diagnostic Studies]]


* Most individuals with an uncorrected secundum ASD don't have significant symptoms through early adulthood.
==[[Atrial septal defect ostium secundum treatment |Treatment]]==
* About '''70% develop symptoms by the time they are in their 40s'''.


* '''10 to 20 %'''of individuals with ostium secundum ASDs also have [[mitral valve prolapse]] .<!----><ref>{{cite journal | author = Leachman R, Cokkinos D, Cooley D | title = Association of ostium secundum atrial septal defects with mitral valve prolapse. | journal = Am J Cardiol | volume = 38 | issue = 2 | pages = 167-9 | year = 1976 | id = PMID 952260}}</ref>
[[Atrial septal defect ostium secundum medical therapy|Medical Therapy]] | [[Atrial septal defect ostium secundum indications for surgical repair| Indications for Surgical Repair]] | [[Atrial septal defect ostium secundum surgical closure | Surgical Closure]] | [[Atrial septal defect ostium secundum percutaneous closure|Percutaneous Closure]]


* It is the '''commonest''' type of [[atrial septal defect]] and accounts '''60%-70%''' of all [[ASD]]s.
==Case Studies==
[[Atrial septal defect ostium secundum case study one|Case #1]]


* It comprises '''6-10%''' of all [[congenital heart disease]]s.


==[[Atrial septal defect echocardiography ostium secundum|Echocardiography in Ostium Secundum Defects]]==


==[[Atrial septal defect surgical repair|Video showing surgical repair of ostium secundum defects ]]==
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[[CME Category::Cardiology]]


==[[Atrial septal defect surgical repair|Video showing surgical repair of ostium secundum defects and the integration of x-ray fluoroscopy and 3D Trans-esophageal-echocardiography]]==
==External links==
* {{EmbryologyTemple|Heart98/heart97a/sld037}}
* {{EmbryologyUNC|cardev|039}}
* [http://staff.um.edu.mt/acus1/Heart-b.htm Overview at edu.mt]
* {{LoyolaMedEd|GrossAnatomy/thorax0/Heart_Development/Atria.html}}
{{Gray's}}
{{Development of circulatory system}}
[[Category:Cardiology]]
[[Category:Cardiology]]
[[Category:Congenital heart disease]]
[[Category:Congenital heart disease]]
[[Category:Pediatrics]]
[[Category:Pediatrics]]
[[Category:Embryology]]
[[Category:Embryology]]
{{developmental-biology-stub}}
[[Category:Disease]]
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==References==
{{reflist|2}}
 
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Latest revision as of 02:10, 15 March 2016

Atrial septal defect ostium secundum Microchapters

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Overview

Anatomy

Pathophysiology

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Natural History, Complications and Prognosis

Diagnosis

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Physical Examination

Chest X Ray

Electrocardiogram

Echocardiography

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Case #1

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For full discussion on atrial septal defects click here.

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-In-Chief: Priyamvada Singh, M.B.B.S. [2]; Assistant Editor(s)-In-Chief: Kristin Feeney, B.S. [3]

Overview

Anatomy

Pathophysiology

Epidemiology and Demographics

Natural History, Complications and Prognosis

Diagnosis

History and Symptoms | Physical Examination | Chest X Ray | Electrocardigram | Echocardiography | Other Diagnostic Studies

Treatment

Medical Therapy | Indications for Surgical Repair | Surgical Closure | Percutaneous Closure

Case Studies

Case #1


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