Chapter 21 Pre/Post

Question 1

What occurs at the AV node during a third-degree heart block?

Answer 1

All impulses are blocked from entering the ventricles.

Question 2

What condition may produce ST-segment elevation, mimicking acute myocardial infarction (AMI)?

Answer 2

Pericarditis.

Question 3

What condition would most likely cause the blood pressure to vary between the left arm and right arm?

Answer 3

Aortic aneurysm.

Question 4

The right atrium, right ventricle, and inferior wall of the left ventricle are supplied by the:

Answer 4

Right coronary artery.

Question 5

A patient shares that they are having difficulty breathing. When asked how long they have been experiencing this symptom, the patient tells you that they have noticed it over the last month. They also share that it occurs most often upon exertion. You suspect that the patient may be exhibiting signs of:

Answer 5

Chronic obstructive pulmonary disease (COPD).

Question 6

What symptom often presents in a patient with an acute coronary syndrome (ACS)?

Answer 6

Chest pain or discomfort.

Question 7

What statement regarding the sinoatrial (SA) node is correct?

Answer 7

The SA node is the dominant cardiac pacemaker in healthy patients.

Question 8

The brief pause between the P wave and QRS complex represents:

Answer 8

A momentary conduction delay at the atrioventricular node.

Question 9

A QRS complex with a bizarre appearance and a duration of how many seconds or more signifies some abnormality in conduction through the ventricles?

Answer 9

0.12

Question 10

Fibrinolysis may be contraindicated if a patient has:

Answer 10

Right versus left arm systolic BP difference of greater than 15mmHg.