CH 26 DYSRHYTHMIAS AND CONDUCTION PROBLEMS

Question 1

What is sinus bradycardia

Answer 1

An impulse that originates in the SA node at a slow rate.

Question 2

What is conduction

Answer 2

The electrical impulse that travels from the SA node thru the atria to the AV node

Question 3

Systole

Answer 3

The contraction of the ventricles

Question 4

Diastole

Answer 4

The ventricles relaxing

Question 5

Artifact

Answer 5

Distorted, irrelevant ECG waveforms, can be caused by chest hair impeding the electrodes from detecting the electrical cure t of the heart.

Question 6

What does a standard 12 lead ECG reflect

Answer 6

The electrical activity primarily in the left ventricle

Question 7

Positive deflection

Answer 7

When an ECG waveform moves toward the top of the paper

Question 8

Negative deflection

Answer 8

When an ECG waveform moves toward the bottom of the paper

Question 9

U wave

Answer 9

Is thought to represent REPOLARIZATION of the Purkinje fibers
This wave is rare and is sometimes seen in ppl with hypokalemia,HTN or heart disease. The U wave is generally smaller than the T wave.

Question 10

PR INTERVAL

Answer 10

Is measured from the beginning of the P wave to the beginning of the QRS complex.

Question 11

ST SEGMENT

Answer 11

Represents early ventricular repolarization

It last from the end of the QRS complex to the beginning of the T wave.

Question 12

QT interval

Answer 12

Represents the total time of ventricular depolarization and repolarization.
It is measured from the beginning of the QRS complex to the end of the T wave.

Question 13

The QT INTERVAL varies under what circumstances

Answer 13

HR, gender and age.

Question 14

If the QT interval is prolonged, what does this suggest

Answer 14

The patient may be at risk for a LETHAL ventricular dysrhythmia called Torsades de pointes

Question 15

TP interval

Answer 15

Is measured from the end of the T wave to the beginning of the next P wave

Question 16

The PP interval

Answer 16

Is measured from the beginning of 1 P wave to the beginning of the next P wave.

Question 17

What is the PP interval used to determine

Answer 17

The atrial rate and rhythm

Question 18

RR interval is measures how

Answer 18

From one QRS complex to the next QRS complex

Question 19

What is the RR complex used to determine

Answer 19

It is used to determine ventricular rate and rhythm

Question 20

How do you determine and calculate HR on a ECG strip

Answer 20

Count the # of small boxes between the RR interval and divide 1500 by that #

Ex: 10 small boxes between RR intervals= 1500/10= 150 bpm

Question 21

What is another alternative for calculating a HR on a ECG strip

Answer 21

Count the # of RR intervals in a 6 second strip and multiply that # by 10.

Question 22

How do u calculate 3 seconds on a ECG strip

Answer 22

Count 15 BIG BOXES

Question 23

How do you determine the atrial rate on a ECG paper

Answer 23

Use the PP interval instead of the RR interval

Question 24

What does each small box on ECG paper represent

Answer 24

0.04 seconds

Question 25

If the RR interval or or PP interval is less than 0.8 seconds, what does that mean

Answer 25

The rate is regular…. If the intervals are different, the rates are called irregular