1. Rhythms that originate in the SA node are called either sinus rhythms or sinus dysrhythmias. a. True b. False 2. Vagal maneuvers are performed to: a. Slow the heart rate b. Dilate the coronary...

1. Rhythms that originate in the SA node are called either sinus rhythms or sinus dysrhythmias.

a. True b. False

2. Vagal maneuvers are performed to:

a. Slow the heart rate

b. Dilate the coronary arteries

c. Reduce ventricular irritability

d. Improve conduction through the AV node

3. The coronary arteries receive oxygenated blood from the:

a. Aorta                                c. Pulmonary veins

b. Coronary sinus             d. Pulmonary arteries