Persistent Left Superior Vena Cava

A persistent left superior vena cava is present in up to 10 of patients with congenital heart disease and can be detected by echocardiography and confirmed by contrast studies. In general a persistent left superior vena cava is incidentally identified during intra thoracic procedures.

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Persistent left superior vena cava plsvc is an uncommon vascular anomaly.

Persistent left superior vena cava. Persistent left superior vena cava is rare but important congenital vascular anomaly. Epidemiology a left sided svc is seen in 0 3 0 5 of the normal population and. A persistent left superior vena cava is a rare accessory thoracic vein from embryological life that can be present with or without a right superior vena cava.

However it is the most common congenital anomaly of thoracic venous system. It is most commonly observed in isolation but can be associated with other cardiovascular abnormalities including atrial septal defect bicuspid aortic valve coarctation of aorta coronary sinus ostial atresia. A left sided superior vena cava svc is the most common congenital venous anomaly in the chest and in a minority of cases can result in a right to left shunt 3 4.

Persistent left superior vena cava plsvc represents the most common congenital venous anomaly of the thoracic systemic venous return occurring in 0 3 to 0 5 of individuals in the general population and in up to 12 of individuals with other documented congential heart abnormalities. In some individuals two vessels may be seen on the right and left while in others only the left one is present. The left superior vena cava is a persistent remnant of a vessel that normally disappears.

It is usually asymptomatic and is detected when cardiovascular imaging is performed for unrelated reasons. Persistent left superior vena cava is the most common venous defect and is present in 0 5 of patients without congenital cardiac defects. Persistent left superior vena cava plsvc is diagnosed when the large vein returning blood from the upper body to the right side of the heart the superior vena cava is seen on the left instead of the right side.

When a left subclavian approach is used for vascular access its presence can. During the fourth week of gestation the venous blood of the upper half of the body is drained by way of the bilateral symmetrically arranged anterior cardinal veins. It results when the left superior cardinal vein caudal to the innominate vein fails to regress.

However co morbid conditions such as congenital heart diseases cardiac. Persistent left superior vena cava superior vena cava on left in anatomy a persistent left superior vena cava plsvc is the most common variation of the thoracic venous system 1 2 is prevalent in 0 3 of the population 3 and an embryologic remnant that results from a failure to involute.

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