Anatomy

Question 1

What are SA and AV nodes supplied by?

Answer 1

RCA

Question 2

What is the Right dominant circulation?

Answer 2

PD artery from the RCA (85%)

Question 3

What is the Left dominant circulation?

Answer 3

PD artery from the LCX (8%)

Question 4

What is the codominant circulation?

Answer 4

PD artery from LCX and RCA (7%)

Question 5

Coronary artery occlusion most commonly occurs where?

Answer 5

LAD

Question 6

Coronary arteries fill during…

Answer 6

Diastole

Question 7

What is the most posterior part of the heart?

Answer 7

LA

Question 8

What happens with enlargement of the LA?

Answer 8

• Dysphagia (compression of the esophagus)

- Hoarseness (compression of the L recurrent laryngeal nerve from the vagus)

Question 9

What is useful for diagnosing LA enlargement, aortic dissection, and thoracic aortic aneurysm?

Answer 9

Transesophageal Echocardiography

Question 10

What does the LCX supply?

Answer 10

Lateral and Posterior walls of the LV

Question 11

What does the LAD supply?

Answer 11

• Anterior 2/3 of IV septum
• Anterior papillary muscle
• Anterior surface of the LV

Question 12

What does the PD supply?

Answer 12

• Posterior 1/3 of IV septum

- Posterior walls of ventricles

Question 13

What does the acute marginal artery supply?

Answer 13

RV