Cardiac Anatomy ☺️

Question 1

Anterior structure

Answer 1

Most anterior structures - RV, RVOT, pulmonary artery

Right auricle, RA
RCA - right AV groove

LV and LAD slightly visible

Question 2

Lateral structures

Answer 2

LAD - A IV septum
LCx - L AV groove => post IV groove

LA, L auricle, LV
LA appendage - site of thrombi in AF

Question 3

Posterior structures

Answer 3

2 L pulmonary veins - sup, inf

3 R pulmonary veins - sup, mid, inf

Question 4

LAD

• divisions
• branches

Answer 4

LAD - proximal, middle, distal

-split by 1st, 2nd diagonal branch

Question 5

RCA

• divisions
• branches

Answer 5

RCA - proximal, mid R artery segment (once past RAV groove), distal

• conus branch => pulmonary artery, RV OT
• distal => PDA at IV groove

Question 6

LCx

• where does it arise from
• branches and divisions

Answer 6

From L mainstem => LAD and LCx
Passes down LAV groove => anterolateral inferior supply

LCx - proximal, mid, distal
-2 obtuse marginal branches

Question 7

What is coronary dominance?

Answer 7

RCA and LCx can both supply the PDA

R coronary dominance RCA => PDA
L coronary dominance LCx => PDA

Question 8

Views of the chambers

Answer 8

4 chambers
2 chambers - both structures on same side
Short axis - both ventricles

Question 9

Valves

• position
• no of leaflets
• structure

Answer 9

Aortic - R, L, non coronary cusp

• most central vessel
• 3 sinuses of Valsalva
• R, L coronary ostium

Pulmonary
-most anterior

Mitral - ant, post

• leftmost
• surrounded by annulus
• attached to chordae tendinae via lateral and medial papillary muscles
• saddle shaped

Tricuspid - ant, post, septal
-rightmost

Question 10

Coronary veins

Answer 10

Front => greater cardiac vein
Anterolateral => left marginal vein
Inf => middle cardiac vein

All rejoin RA via coronary sinus