ECG

Question 1

P Wave

Answer 1

Atrial contraction (depolarization). This tells you if the SA node is firing at regular intervals.

Question 2

QRS Complex

Answer 2

Ventricular contraction (depolarization)

Question 3

T Wave

Answer 3

Ventricular repolarization

Question 4

U Wave

Answer 4

Purkinje fiber repolarization. Most often found in slow heart rhythms.

Question 5

PR Interval

Answer 5

The electrical impulse travels between the atria and the ventricles.

Question 6

ST Segment

Answer 6

Time between depolarization and depolarization of the ventricles.

Question 7

QT Interval

Answer 7

Total activity of the ventricles

Question 8

5 Steps to Reading an ECG

Answer 8

1. Heart Rate
2. Heart Rhythm
3. P Wave
4. PR Interval
5. QRS Complex

Question 9

How to determine heart rate

Answer 9

1. Count the number of small boxes between the R wave and divide 1500 by it.
2. Count the number of R waves within 6 seconds and multiply by 10.
   3.

Question 10

How to determine heart rate with irregular rhythm

Answer 10

Count the number of small boxes between R wave and divide 1500 by this number.

Question 11

Hot to determine heart rhythm

Answer 11

Measure the intervals between R waves. If this varies less than .06 seconds (1.5 small boxes) it is a regular rhythm.

Question 12

How many seconds is one small box?

Answer 12

.04 seconds

Question 13

How many seconds is one large box?

Answer 13

.20 seconds

Question 14

P Wave Questions

Answer 14

1. Are P waves present?
2. Are P waves occurring regularly?
3. Is the a P wave for each QRS complex
4. Are P waves smooth, rounded and upright?

Question 15

PR Interval Questions

Answer 15

1. Are the PR intervals >.20 seconds?

2. Are the PR intervals

Question 16

Normal range for PR interval

Answer 16

.12 to .20 seconds (3-5 small boxes)

Question 17

QRS Complex Questions

Answer 17

1. Is the complex > .12 seconds

2. Is the complex

Question 18

Normal range for QRS complex

Answer 18

.06 to .12 seconds