EKG Review Part 1

Front

How many seconds is one small box on an EKG?

Back

0.04 seconds

Front

What is the normal time interval for the P-R segment?

Back

0.12-0.20 seconds (3-5 small boxes)

Front

What does the P wave represent in an EKG?

Back

Atrial depolarization and contraction

Front

What is the normal interval time for the QRS complex?

Back

0.04-0.10 seconds (1-2.5 small boxes)

Front

At what rate does the AV (Atrio-Ventricular) node fire?

Back

40-60 BPM

Front

What does the T wave represent in an EKG?

Back

Ventricular repolarization

Front

What is the significance of the ST segment?

Back

It represents the period between ventricular depolarization and repolarization.

Front

What is the normal heart rate range for adults?

Back

60-100 BPM

Front

What does a prolonged QRS complex indicate?

Back

Possible bundle branch block or ventricular hypertrophy.

Front

What is the purpose of an EKG?

Back

To assess the electrical activity of the heart.