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Chest X ray of a person with dextrocardia situs inversus showing the cardiac apex facing the right
|Classification and external resources|
Dextrocardia is a rare congenital defect in which the apex of the heart is situated on the right side of the body. There are two main types of dextrocardia: dextrocardia of embryonic arrest (also known as isolated dextrocardia) and dextrocardia situs inversus. Dextrocardia situs inversus is further divided.
Dextrocardia of embryonic arrest
In this form of dextrocardia, the heart is simply placed further right in the thorax than is normal. It is commonly associated with severe defects of the heart and related abnormalities including pulmonary hypoplasia.
Dextrocardia situs inversus
Although statistically people with dextrocardia situs inversus do not have any medical problems from the disorder, they may be prone to a number of bowel, esophageal, bronchial and cardiovascular disorders (such as double outlet right ventricle, endocardial cushion defect and pulmonary stenosis). Certain cardiovascular and pulmonary disorders related to dextrocardia can be life-threatening if left unchecked (see reference).
Technical dextrocardia refers to an ECG reading that has no basis in the patient's anatomy. This apparent presentation of dextrocardia is caused usually by the technician inadvertently swapping the limb leads on a 12 lead ECG. Usually this would show as an extreme axis deviation.
ECG leads must be placed in reversed positions on a person with dextrocardia. In addition, when defibrillating someone with dextrocardia, the pads should be placed in reverse positions. That is, instead of upper right and lower left, pads should be placed upper left and lower right.
Dextrocardia is believed to occur in approximately 1 in 12,000 people.
- M. E. Abbott and J. C. Meakins (1915). "On the differentiation of two forms of congenital dextrocardia". Bulletin of the International Association of Medical Museums (5): 134–138.
- MedlinePlus Medical Dictionary. "Dextrocardia".
- Renee A Laux MS. "Kartagener Syndrome".
- Bindra, S. MD Tabibiazar, R. MD Mazar, M MD and Dave, R MD (2011). "Clinical Vignette: Dextrocardia with Situs Inversus: Through the Looking Glass with an ECG". Proceedings of UCLA Healthcare (Department of Medicine, UCLA) 15.
- Eddy,S. "Dextrocardia and Proper Lead Placement".
- Bohun CM, Potts JE, Casey BM, Sandor GG (July 2007). "A population-based study of cardiac malformations and outcomes associated with dextrocardia". Am. J. Cardiol. 100 (2): 305–9. doi:10.1016/j.amjcard.2007.02.095. PMID 17631088.
- MedEd at Loyola GrossAnatomy/thorax0/Heart_Development/Dextrocardia.html
- Overview at rch.org.au
- Dextrocardia at NIH's Office of Rare Diseases
- Dextrocardia with situs inversus at NIH's Office of Rare Diseases
|In cognitive abilities||Geschwind–Galaburda hypothesis|
|In eyes||Ocular dominance|
|Handedness in boxing||Southpaw stance||Orthodox stance|
|Handedness in people|
|Handedness related to|
|Handedness measurement||Edinburgh Handedness Inventory|
|In major viscera||Situs solitus||Situs ambiguus||Situs inversus|