The duration of the PR interval on an electrocardiogram (ECG) reflects the time required for:

A. conduction from the atrioventricular (AV) node to the sinoatrial (SA) node.
B. conduction from the sinoatrial (SA) to the atrioventricular (AV) node.
C. depolarization and conduction through the ventricles.
D. depolarization and repolarization of the ventricles.


Answer: B

Nursing

You might also like to view...

When asked about her activities, a 10-year-old girl responded, "I like school. I play the flute in the school band, and I take tennis lessons." What does the nurse know these activities will help this child develop?

a. Initiative b. Industry c. Identity d. Intimacy

Nursing

The nurse admits into the labor area a client who is in preterm labor. What assessment finding would constitute a diagnosis of preterm labor?

1. Cervical effacement of 30% or more 2. Cervical change of 0.5 cm per hour 3. 2 contractions in 30 minutes 4. 8 contractions in 1 hour

Nursing

When taking a patient's history, which of the following components would reveal information about such illnesses as cancer or heart disease?

A. past health history B. history of present illness C. family history D. chief complaint

Nursing

A novice nurse is hired for a full-time night position on a psychiatric-mental health unit. Which activity will protect this nurse’s sleep territory?

a. Go to bed and get up at consistent times. b. Use caffeine consistently throughout the day. c. Avoid long commute times or have someone drive the nurse to work. d. Find a dark room, turn off phones, and place a sign on the door.

Nursing