Question

true and flase -

The left vagus nerves runs anterior to the aortic arch and posterior to the left pulmonary. artery.

- The tricuspid murmur can be heard in the 5th intercostal space on the right side of the sternum.

Answer 1

1. True .

The left vagus nerve passes through the thorax region between subclavian artery and left common carotid artery, then left vagus nerve enters to the aortic arch and leave the left laryngeal nerve which crosses beneath the arch and posterior to the ligamenum arteriosum.Then, vagus nerve runs through the posterior to the roof of left lung (pulmonary artery).

2. False

Tricuspid murmuring is usually in low intensity, it can be heard in the 2nd intercostal space on the left sternal border. This murmuring arises and comes towards the apex region, thus it can be heard when patient is in lean forward position and with expiration of air.