Interior of the Heart

Question 1

What vessels drain into the right atrium?

Answer 1

Vena Cava

Coronary sinus

Question 2

What are the crista terminalis?

Answer 2

Space between inferior and superior vena cava indicated by a smooth muscular ridge that extends from roof of atria in front of superior vena cava then lateral down wall to lip of inferior vena cava

Question 3

What is the foramen ovale?

Answer 3

Allows blood to cross atrium to bypass pulmonary circulation - closes after birth

Question 4

Describe the chordinae tendineae

Answer 4

Tendinous chords - heart strings

Connects papillary muscles to tricuspid valve

Question 5

What would be the effect of mitral stenosis on the heart?

Answer 5

Increase in pressure in the lungs, leading to fluid accumulation

Question 6

Describe ASD and VSD

Answer 6

Atrio septal defect and ventral septal defect
ASD - blood flows from left to right atrium
VSD - O2 blood passes from left to right ventricle

Question 7

What is the moderator band?

Answer 7

Specialised trabecular which bridges the lower portion of the inter ventricular septum and the base of anterior papillary muscle - septomarginal trabecula