Heart and Great Vessels

Question 1

Pericardium

Answer 1

outer fibrous layer fuses with the walls of the great vessels

inner serous layer = parietal and visceral layers wit pericardial fluid between

Blood supply from pericardiophrenic branches of internal thoracic artery

Nerve supply from phrenic nerve

Question 2

Right atrium structures

Answer 2

Sulcus terminalis - vertical groove on outer aspect of the RA

Crista terminalis - muscular ridge inner aspect of RA seperating smooth surface and muscular pectinati

Fossa ovalis - depression in atrial septum

Question 3

Right ventricle structures

Answer 3

Chordae tendinae - attached to the edges of the valve cusps and attached to papillary wall muscles

Trabeculae carnae - muscular bundles within the walls

MOderator band - right branch of the AV bundle

Question 4

Right coronary artery

Answer 4

SAN in 60%
Arises from aortic sinus
Branches: marginal and posterior interventricular branch

Question 5

Left coronary artery

Answer 5

SAN in 40%
Arises from aortic sinus
Branches: anterior inter-ventricular branch, posterior interventricular branch

Question 6

Venous drainage

Answer 6

accompnay coronary arteries
drain into RA via coronary sinus

venae cordis minimi - small veins draining directly into RA

Question 7

Branches of ascending aorta

Answer 7

left and right coronary arteries

Question 8

Branches of aortic arch

Answer 8

Brachiocephalic: bifurcates into right subclavian and right common carotid posterior to right sternoclavicular joint
Left common carotid
Left subclavian
Thyroid ima

Question 9

Branches of descending aorta

Answer 9

Oesophageal
Bronchial
Mediastinal
Posterior intercostal
Subcostal