Electrocardiography: Arrhythmias

Question 1

Normal Sinus Rhythm

Answer 1

Normal ECG tracing depicting a normal rhythm of electrical conductivity through the heart

Question 2

Which arrhythmia is considered normal in canines?

Answer 2

Sinus arrhythmia

Question 3

Is a sinus arrhythmia regular or irregular?

Answer 3

Irregular

Question 4

Which arrhythmia is associated with respiration?

Answer 4

Sinus arrhythmia

Question 5

Sinus bradycardia

Answer 5

Heart rate is slower than normal

Question 6

Are all waveforms present for sinus bradycardia?

Answer 6

Yes

Question 7

Sinus tachycardia

Answer 7

Heart rate is faster than normal

Question 8

Which waveforms are not present with an atrial flutter?

Answer 8

P waves

Question 9

What does an atrial flutter look like on an ECG?

Answer 9

saw-tooth formation

Question 10

Is the heart rate faster or slower with an atrial flutter?

Answer 10

faster

Question 11

Which waveform is not present with atrial fibrillation?

Answer 11

P waves

Question 12

Is the heart rate faster or slower with an atrial fibrillation?

Answer 12

It is faster than normal

Question 13

What wave form do ventricular premature complexes lack?

Answer 13

P waves

Question 14

Where do the ventricular premature complexes impulses originate from?

Answer 14

the ventricular myocardium

Question 15

What does the QRS complex for ventricular premature complexes look like?

Answer 15

wide and bizarre

Question 16

Bigeminy

Answer 16

Every other beat is a VPC

Question 17

Trigeminy

Answer 17

Every third beat is a VPC

Question 18

Ventricular tachycardia

Answer 18

a series of four or more VPCs in a row

Question 19

What can ventricular tachycardia be treated with?

Answer 19

IV lidocaine

Question 20

What type of rhythm is shown with ventricular fibrillation?

Answer 20

an irregular rhythm

Question 21

What is the treatment for ventricular fibrillation?

Answer 21

defibrillation

Question 22

What will happen if ventricular fibrillation is not controlled right away?

Answer 22

Could result in cardiac arrest

Question 23

Asystole

Answer 23

No cardiac electrical activity

Question 24

What does asystole look like on an ECG?

Answer 24

Flat baseline

Question 25

What happens with an atrial standstill?

Answer 25

the sinoatrial node sends an impulse, but it is not followed by atrial depolarization

Question 26

What waveforms are seen with an atrial standstill?

Answer 26

No P waves, but normal QRS complexes can be seen

Question 27

Is the heart rate faster or slower with an atrial standstill?

Answer 27

the rate is slower than normal

Question 28

What is a first degree AV block?

Answer 28

A delay in conduction of an impulse through the AV node

Question 29

Which interval is longer in a First Degree AV block?

Answer 29

the P-R interval is longer

Question 30

What is a second degree AV block?

Answer 30

the disruption of conduction through the AV node

Question 31

What is going on with the waves in the second degree AV block?

Answer 31

P waves are occurring without QRS complexes

Question 32

What are the two types of second degree AV block?

Answer 32

Mobitz type I

Mobitz type II

Question 33

Mobitz type I

Answer 33

the progressive lengthening of the PR interval until no complex is conducted

Question 34

Mobitz type II

Answer 34

An intermittent block at the AV node, that conducts some impulses but blocks others

Question 35

What does the P-R interval look like with Mobtz type II?

Answer 35

the P-R interval is of normal duration with random dropped beats

Question 36

Which AV block is the most severe?

Answer 36

Third-degree AV block

Question 37

Is there anything going on between the P waves and QRS complexes on a third-degree AV block?

Answer 37

No