Deoxygenated blood from the body returns to the:

• right atrium.

• right ventricle.

• left atrium.

• left ventricle.

Angina pectoris occurs when:

• a coronary artery is totally occluded by plaque.

• myocardial oxygen demand exceeds supply.

• one or more coronary arteries suddenly spasm.

• myocardial oxygen supply exceeds the demand.

The electrical impulse generated by the heart originates in the:

• bundle of His.

• coronary sinus.

• atrioventricular node.

• sinoatrial node.

A 49-year-old male presents with an acute onset of crushing chest pain and diaphoresis. You should:

• administer up to 324 mg of baby aspirin.

• administer up to three doses of nitroglycerin.

• obtain vital signs and a SAMPLE history.

• assess the adequacy of his respirations.

You and your partner arrive at the scene of a middle-aged man who collapsed about 5 minutes ago. He is unresponsive, apneic, and pulseless. Bystanders are present, but have not provided any care. You should:

• begin high-quality CPR and apply the AED as soon as possible.

• have your partner perform CPR while you question the bystanders.

• perform two-rescuer CPR for 5 minutes and request ALS backup.

• immediately apply the AED pads and analyze his cardiac rhythm.

The only vein(s) in the body that carry oxygenated blood is/are the:

• external jugular veins.

• subclavian veins.

• pulmonary veins.

• inferior vena cava.

In general, a maximum of _____ dose(s) of nitroglycerin is/are given for any one episode of chest pain.

• 2

• 3

• 4

• 5

What is the function of the left atrium?

• It ejects oxygenated blood into the aorta.

• It receives oxygenated blood from the lungs.

• It receives blood from the pulmonary arteries.

• It receives oxygenated blood from the vena cava.

When an electrical impulse reaches the AV node, it is slowed for a brief period of time so that:

• blood can pass from the atria to the ventricles.

• blood returning from the body can fill the atria.

• the impulse can spread through the Purkinje fibers.

• the SA node can reset and generate another impulse.

Major risk factors for AMI include all of the following, EXCEPT:

• hypoglycemia.

• hypertension.

• diabetes mellitus.

• elevated cholesterol.