Arrhythmias

Question 1

Overactive thyroids cause ______________ heart rates.

Answer 1

fast

Question 2

Increased PR intervals can be caused by ___________.

Answer 2

drugs (ß-blockers, digoxin, or calcium-channel blockers) or conduction-system disorders

Question 3

1° AV blocks are usually __________.

Answer 3

benign

Question 4

Premature atrial contractions display ______ QRS waves.

Answer 4

normal

Question 5

Premature ventricular contractions are found in _____________.

Answer 5

healthy people, those who have had myocardial infarctions, and those with heart failure

Question 6

ECG pattern of PVC is _________.

Answer 6

a wide QRS wave with no P wave preceding it

Question 7

PVCs are treated with __________.

Answer 7

ß-blockers, although some don’t need treatment

Question 8

Atrial flutter is characterized by ___________.

Answer 8

extra P waves between QRS waves

Question 9

Atrial flutter is treated with __________.

Answer 9

anticoagulants, cardioversion, ablation, and rate controllers

Question 10

Atrial tachycardia is revealed by ____________.

Answer 10

high heart rate, abnormal P waves, and normal QRS waves

Question 11

Junctional rhythm is ____________.

Answer 11

normal QRS, but no P wave–treatment is usually not needed because the ventricles only need atrial contraction for roughly 20% of their fill volume

Question 12

Name two calcium-channel blockers.

Answer 12

Verapamil and diltiazem

Question 13

In junctional rhythm, the depolarization wave originates in the __________.

Answer 13

AV node–thus, no P wave will be seen

Question 14

A normal P wave is inverted in the ______ lead.

Answer 14

aVR