Wk 2 Dysrhythmias

Question 1

How long should the PR interval be?

Answer 1

0.12-0.20 seconds

Question 2

How long should the QT interval be?

Answer 2

Under 0.38 seconds

Question 3

How long should the QRS interval be?

Answer 3

0.10 seconds or less

Question 4

If there is a delay between the atria and the ventricles, what will happen on the EKG/tele strip?

Answer 4

the PR interval will be longer

Question 5

What is a potential cause of a peaked T wave?

Answer 5

Potassium imbalances

Question 6

How many seconds does 1 small box on an EKG represent?

Answer 6

0.04 seconds

Question 7

How many seconds does 1 big box on an EKG represent?

Answer 7

0.20 seconds

Question 8

How many small boxes make up one big box on an EKG?

Answer 8

5

Question 9

How many seconds does 1 EKG represent?

Answer 9

6

Question 10

What do the bars on the top of the graph mean on an EKG?

Answer 10

In between each bar is 3 seconds

Question 11

An ST elevation needs to be in __ continuous leads to diagnose a STEMI

Answer 11

2

Question 12

What is an artifact?

Answer 12

Irregularity that is not due to the electrical conduction of the patient’s heart, such as disconnection, patient is receiving PT, etc.

Question 13

What are 3 classifications of dysrhythmias?

Answer 13

Premature, Brady, tachy

Question 14

What is a bradydysrhythmia?

Answer 14

HR less than 60

Question 15

When are coronary arteries perfused?

Answer 15

During diastole

Question 16

What is a common reason beta blockers are given?

Answer 16

To slow the heart rate so myocardial oxygen demand is reduced

Question 17

What are two benefits of bradycardia?

Answer 17

decreased myocardial oxygen demand

Increased coronary artery perfusion time

Question 18

What is a consequence of bradycardia and the coronary arteries?

Answer 18

If the heart rate is too slow the coronary arteries won’t perfuse and angina will occur

Question 19

If a patient is bradycardic and also has inadequate blood pressure, this may cause what 4 complications?

Answer 19

Myocardial ischemia/infarct
Dysrhythmias
Hypotension
Heart failure

Question 20

What is considered tachycardia?

Answer 20

HR above 100

Question 21

What happens to the coronary arteries during tachycardia?

Answer 21

Shortens diastolic time which shortens coronary perfusion time

Question 22

What is an initial benefit of tachycardia?

Answer 22

Increased cardiac output and BP

Question 23

What happens if tachycardia is sustained?

Answer 23

Decreased ventricular filling and decreased CO &BP

Question 24

BP is an indirect measure of __ __

Answer 24

cardiac output

Question 25

How does tachycardia increase the workload on the heart?

Answer 25

Increases myocardial oxygen demand

Question 26

What causes angina?

Answer 26

Lack of/decreased coronary perfusion

Question 27

What neurologic symptoms might someone have with tachycardia or Brady cardia?

Answer 27

Restlessness
Anxiety
Confusion
Dizziness
Syncope

Question 28

What is pulse deficit?

Answer 28

When 2 nurses take apical and radial pulses and there is a deficit (should get the same number)

Question 29

Pulse deficit is an indication of poor __ __

Answer 29

peripheral perfusion

Question 30

Pulmonary crackles are an indication of __-sided heart failure

Answer 30

left

Question 31

What is orthopnea?

Answer 31

SOA when lying down

Question 32

JVD is an indication of __-sided heart failure

Answer 32

right

Question 33

Why does Brady/tachycardia lead to decreased urine output?

Answer 33

Perfusion to kidneys suffers and they stop making urine