Cardiac Artery Territories

Question 1

When someone has an MI, what do we need to know?

Answer 1

Which wall of LV is affected?

Which BV supplies that wall?

Question 2

Which part of the left ventricular wall is supplied by LAD?

Answer 2

Anterior wall

Anterior septum

Apex of LV

Question 3

Which ECG leads show LAD artery and wall type is affected?

Answer 3

ST elevation in V2-V4

In leads I, aVL, V5, V6

Question 4

Which part of the left ventricular wall is supplied by LCX?

Answer 4

Lateral wall

Question 5

Which ECG leads show LCX artery and wall type is affected?

Answer 5

ST elevation in leads I and aVL

Question 6

Which part of the left ventricular wall is supplied by PDA?

Answer 6

Inferior wall

Inferior septum

Question 7

What % and artery arise from the right and left dominant?

Answer 7

RIGHT DOMINANT circulation: 85%
= PDA arises from RCA

LEFT DOMINANT circulation: 8%
= PDA arises from LCX

CODOMINANT circuation: 7%
= PDA arises from both LCX and RCA

Cornary blood flow peaks in early diastole

Question 8

Which ECG leads show PDA and wall type is affected?

Answer 8

ST elevation in leads II, III, aVF

Question 9

Which papillary muscle attaches to the inferior wall of LV?

Answer 9

The posteromedial muscle

Therefore this part of wall is more vulnerable to damage

Question 10

Which arteries are most likely to have an occlusion occur?

Answer 10

LAD > RCA > LCX

Most likely = LAD
Least likely = LCX