truncus arteriosus


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truncus

 [trung´kus] (L.)
truncus arterio´sus an artery connected with the fetal heart, developing into the aortic and pulmonary arches.
truncus brachiocepha´licus a vessel arising from the aortic arch and giving origin to the right common carotid and right subclavian arteries. Called also innominate artery (see anatomic Table of Arteries in the Appendices).
truncus celi´acus celiac trunk.
truncus encepha´licus brainstem.
truncus pulmona´lis pulmonary trunk.

trun·cus ar·te·ri·o·'sus

the common arterial trunk opening out of both ventricles in the embryo, later destined to be divided into aorta and pulmonary artery by development of the spiral aorticopulmonary septum.

truncus arteriosus

Cardiology A congenital heart defect characterized by a single arterial trunk arising in the ventricle, which supplies the pulmonary, coronary, and systemic circulation; a large VSD always accompanies TAs, essentially converting the right and left ventricles into a single chamber; blood flows at a higher pressure through the arteries–the pressure in the pulmonary circulation is normally low; systemic pressure in the pulmonary circulation ↑ blood flow through the lungs, ↑ cardiac load, heart failure; ↑ pulmonary pressure eventually damages the pulmonary vessels, causing ↑ pulmonary resistance, ergo ↓ pulmonary blood flow and cyanosis Clinical SOB, fatigue, heart failure, poor growth, physical development and, untreated, death at a young age. See Cyanotic heart disease.
References in periodicals archive ?
TOF, DORV, truncus arteriosus) carries a higher risk of recurrent respiratory tract infections and increased frequency of hospitalizations (2).
Gadewar et al., "Rare case of truncus arteriosus with anomalous origin of the right coronary artery from the pulmonary artery (ARCAPA) and unilateral left pulmonary artery agenesis," Japanese Journal of Radiology, vol.
The number of days with temperature [greater than or equal to] 30[degrees]C was not significantly associated with any specific critical heart defect in adjusted models, however prevalence was low and positive associations tended to be present with transposition of the great vessels, truncus arteriosus and coarctation of the aorta (Figure 2).
There she became the first baby with truncus arteriosus at Bristol to undergo lifesaving bilateral pulmonary artery banding surgery.
In particular, 153 patients harboured defects determining increased volume overload (i.e., defects characterized by left-to-right shunt, such as ventricular septal defect, patent ductus arteriosus, truncus arteriosus, atrial septal defect, and atrioventricular septal defects); 62 patients had heart defects with pressure overload involving the left ventricle (i.e., aortic stenosis and aortic coarctation) or the right ventricle (i.e., tetralogy of Fallot and pulmonary stenosis); and 15 patients were affected with complex cyanotic CHD (i.e., univentricular heart and transposition of the great arteries).
Van Praagh, "The anatomy of common aorticopulmonary trunk (truncus arteriosus communis) and its embryologic implications.
Complex congenital heart disease was found in seven patients including pulmonary atresia, interrupted aortic arch, transposition of the great arteries, and persistent truncus arteriosus.
Distribution of the patients by diagnosis n % Diagnosis Transposition of the great arteries 28 33.7 Pulmonary atresia 16 19.3 Aortic coarctation 10 12.0 Single ventricle 6 7.2 Hypoplastic left heart syndrome 6 7.2 Tricuspid atresia 5 6.0 Pulmonary stenosis 3 3.6 Truncus arteriosus 2 2.4 Aortic arch anomaly 2 2.4 Cardiomyopathy 1 1.2 Taussig Bing anomaly 2 2.4 Valvular aortic stenosis 1 1.2 AV complete block 1 1.2 Total 83 100.0 Table 3.
In the second procedure, more complicated but a successful one, a septuagenarian was suffering from truncus arteriosus, the leading cardiac catheterization consultant said.
When analyzed by preoperative diagnoses the data revealed that children with a single ventricle undergoing banding had a significantly lower 30-day mortality rate of 12% as compared to other preoperative diagnoses including atrioventricular canal truncus arteriosus and ventricular septal defect (VSD) at 30%.3 In the recent past insertion of a valved patch in VSD repair seems to be a promising technique to decrease morbidity and mortality in severe pulmonary arterial hypertension.45
Natasha Halkett's four-monthold daughter Layla died in July 2012 as a result of truncus arteriosus type II, a congenital heart defect which occurs in fewer than one in every 10,000 births.