Complete transposition of the great arteries (TGA)CComplete transposition of the great arteries (TGA)Complete transposition of the great arteries (TGA)EnglishCardiologyChild (0-12 years)HeartCardiovascular systemConditions and diseasesAdult (19+)NA2009-12-04T05:00:00ZFraser Golding, MD, FRCPC11.000000000000047.0000000000000542.000000000000Flat ContentHealth A-Z<p>Learn about transposition of the great arteries (TGA). With this condition, the vessels that carry blood away from the heart are improperly positioned.</p><p>With this defect, the positions of the vessels that take blood away from the heart to the lungs and the body are switched: the aorta comes out of the right ventricle, while the pulmonary artery comes out of the left ventricle. This means that blood that already has oxygen flows to the lungs, while blood that needs oxygen flows around the body. </p><h2> Key points </h2> <ul><li>In complete transposition of the great arteries (TGA), blood in need of oxygen circulates through the body instead of the lungs. </li> <li>TGA is fatal unless another defect allows blood to mix between the two circulation systems so that the body gets oxygen.</li> <li>Babies born with TGA show symptoms immediately after birth (mainly cyanosis).</li> <li> Babies with TGA will need open heart surgery within the first few weeks of life.</li></ul>
Transposition complète des gros vaisseauxTTransposition complète des gros vaisseauxComplete Transposition of the Great Arteries (TGA)FrenchCardiologyChild (0-12 years)HeartCardiovascular systemConditions and diseasesAdult (19+)NA2009-12-04T05:00:00ZFraser Golding, MD, FRCPC11.000000000000047.0000000000000542.000000000000Flat ContentHealth A-ZInformez-vous sur la transposition complète des gros vaisseaux. Cette anomalie fait en sorte que les vaisseaux qui transportent le sang depuis le cœur sont mal disposés.<p>Cette anomalie fait en sorte que la position des vaisseaux qui amènent le sang du cœur aux poumons et au corps est interversée : l’aorte sort du ventricule droit et l’artère pulmonaire sort du ventricule gauche. Cela signifie que le sang qui renferme déjà de l’oxygène se rend aux poumons, et que le sang qui a besoin d’oxygène circule dans le corps. </p><h2> À retenir </h2> <ul><li> La transposition complète des gros vaisseaux fait en sorte que le sang qui a besoin d’oxygène circule dans le corps au lieu des poumons. </li> <li>Cette anomalie est fatale à moins qu’il existe une autre anomalie qui permet au sang de se mélanger entre deux systèmes circulatoires pour que le corps reçoive l’oxygène dont il a besoin. </li> <li>Les bébés nés avec une transposition complète des gros vaisseaux montrent des symptômes, habituellement la cyanose, immédiatement après la naissance. </li> <li>Ces bébés devront subir une chirurgie à coeur ouvert dans les premières semaines suivant la naissance. </li></ul>

 

 

Complete transposition of the great arteries (TGA)1611.00000000000Complete transposition of the great arteries (TGA)Complete transposition of the great arteries (TGA)CEnglishCardiologyChild (0-12 years)HeartCardiovascular systemConditions and diseasesAdult (19+)NA2009-12-04T05:00:00ZFraser Golding, MD, FRCPC11.000000000000047.0000000000000542.000000000000Flat ContentHealth A-Z<p>Learn about transposition of the great arteries (TGA). With this condition, the vessels that carry blood away from the heart are improperly positioned.</p><p>With this defect, the positions of the vessels that take blood away from the heart to the lungs and the body are switched: the aorta comes out of the right ventricle, while the pulmonary artery comes out of the left ventricle. This means that blood that already has oxygen flows to the lungs, while blood that needs oxygen flows around the body. </p><h2> Key points </h2> <ul><li>In complete transposition of the great arteries (TGA), blood in need of oxygen circulates through the body instead of the lungs. </li> <li>TGA is fatal unless another defect allows blood to mix between the two circulation systems so that the body gets oxygen.</li> <li>Babies born with TGA show symptoms immediately after birth (mainly cyanosis).</li> <li> Babies with TGA will need open heart surgery within the first few weeks of life.</li></ul><p>About 5% to 7% of babies with CHD have this defect. It is considered to be the defect most commonly identified in the first week of life. </p><p>This defect is fatal unless another defect exists that allows blood to mix between the two circulation systems so that the body gets the oxygen it needs. This usually means an atrial septal defect, a ventricular septal defect, or patent ductus arteriosus. Babies born with complete transposition of the great arteries show symptoms — mainly cyanosis — immediately after birth. </p><p>In complete TGA, the aorta and the pulmonary artery have switched places, leaving the child very cyanotic. This defect occurs in about 5% of all patients with CHD. </p> <figure class="swf-asset-c-80"><span class="asset-image-title">Complete transposition of the great arteries</span><div class="asset-animation"> src="https://akhpub.aboutkidshealth.ca/Style%20Library/akh/swfanimations/swf.html?swffile=Transposition_great_arteries_MED_ANI_EN.swf" </div> <figcaption class="asset-image-caption">The large vessels that carry blood out of the heart have switched positions. The aorta carries deoxygenated blood to the body (instead of oxygenated blood) while the pulmonary arteries carry oxygenated blood to the lungs (instead of deoxygenated blood). As a result, blood in need of oxygen circulates through the body instead of the lungs.</figcaption> </figure> <h2>How is transposition of the great arteries treated?</h2><p>At first, a drug called prostaglandin will be given to keep the ductus arteriosus open to improve circulation. Another procedure that can help mixing of the blood is a balloon atrial septostomy, which puts a hole or opening between the left and right atria. This is a temporary measure until the child is old enough for surgery to establish normal blood circulation. </p><p>A baby with TGA will need a type of surgery called an arterial switch procedure within the first few weeks of life.This open heart procedure will correct the blood flow. It involves “switching” the pulmonary artery and the aorta back to their normal positions and attaching the coronary arteries to the new aorta in the correct positions. </p><h2>What is the long-term outlook for children with transposition of the great arteries?</h2><p>The long-term outlook depends on the type of repair. In the past, patients with "atrial switch" repairs (sometimes called Mustard or Senning repairs) were at risk of losing their normal cardiac rhythm over time and developing arrhythmias, which can lead to sudden cardiac death. Other risks included leakage of blood backward through the valve (blood regurgitation), ventricular failure, and obstruction of the tunnel created to redirect blood flow (baffle obstruction). </p><p>More recently, almost all children with TGA undergo an "arterial switch repair," also called the Jatene repair. This procedure appears to significantly reduce these risks, although a small percentage of patients may have long-term problems with their coronary arteries. </p>Complete transposition of the great arteries (TGA)

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