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Health Assessment (spring 2024/mebs) > Exam 1 Basic EKG > Flashcards

Exam 1 Basic EKG Flashcards

1
Q

The heart has the innate ability to generate its own spontaneous action potentials without any external stimuli, a phenomenon known as __________.

A

Automaticity

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2
Q

What are the two types of cells in the heart?

A

Pacemaker Cells (spontaneous action potentials)
Contractile Cells

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3
Q

When there is a stimulation above the threshold, __________ channels cause cell-to-cell conduction resulting in depolarization.

This will release ________ to interior myocytes and causes contraction.

_______ outflow causes repolarization.

A

Sodium Channels

Calcium

Potassium

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4
Q

Once the action potential is generated by the SA node, conduction will go to the right atrium via the __________ pathway.

Conduction will also travel from the right atrium to the left atrium via ____________.

A

Internodal Pathway

Bachman’s Bundle

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5
Q

The inherent pace of the SA node.

The inherent pace of AV node.

A

60-100 bpm

40-60 bpm

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6
Q

Atrial fibrillation will result in a _______% decrease in cardiac output.

A

20-25% decrease in CO

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7
Q

The bundle of His is located in the __________.
The bundle of His has pacemaker cells that can generate an action potential at _________ beats/minute.

A

interventricular septum

40 to 60 bpm

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8
Q

The bundle branch consists of pacemakers cells that can generate _________ bpm.

A

20 to 40 bpm

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9
Q

How many mV are the large boxes?
How many mV are the small boxes?

How many seconds are the small boxes?
How many seconds are the larges boxes?

A

0.5 mV
0.1 mV

0.04 seconds
0.20 seconds

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10
Q

What does the P-wave represent?

What is the normal duration of P-waves?

A

Atrial Depolarization

less than 0.12 seconds

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11
Q

What does the PR interval represent?

What is a normal PR interval?

What is a PR interval greater than 0.20 seconds called?

A

PR interval represents the time from the onset of atrial depolarization (contraction) to the onset of ventricular depolarization. The pause for the blood to go from the atria to the ventricles.

0.12 to 0.20 seconds

First-degree AV block

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12
Q

What does the QRS complex represent?

What is the duration of the QRS complex?

A

Ventricular depolarization

<0.12 seconds

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13
Q

What does the ST segment represent?

A

ST segment represents the interval between depolarization and repolarization of the ventricles.

Early stages of ventricular repolarization.

Elevation > 1mm is significant (injury/ischemia)

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14
Q

What does the T wave represent?

A

Repolarization of the ventricle

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15
Q

What rhythms will have retrograde p-waves?

A

Junction rhythms

(Rhythm is coming from the AV node and back up to SA node)

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16
Q

Why is the latter PR interval flat?

A

No contraction, so the blood can continue to flow down the ventricles.

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17
Q

What do we associate with a QRS complex wider than 0.12 seconds?

A

Bundle branch block

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18
Q

What causes elevated T-waves?

A

Hyperkalemia

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19
Q

When is atrial repolarization?

A

During QRS complex

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20
Q

What is the rhythm?

A

Sinus Rhythm

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21
Q

What is the rhythm?

A

Sinus Bradycardia

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22
Q

What is the rhythm?

A

Sinus Tachycardia

(100-150 bpm)

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23
Q

What is the rhythm?

A

Junctional Rhythm
HR 40-60 bpm
Signal starts in AV node

(look for the inverted p-wave)

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24
Q

What is the rhythm?

A

Junctional tachycardia
HR >60 bpm
Signal starts in AV node

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25
Q

What is the rhythm?

A

PSVT
(HR>150)

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26
Q

What does paroxysmal mean?

A

“comes and goes”

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27
Q

What is the rhythm?

A

Premature atrial contraction

(find the underlying rhythm and then figure out the accessory rhythm and look for compensatory pause)

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28
Q

What is the rhythm?

A

A-fib
(Think irregularly irregular)

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29
Q

What is the rhythm?

A

A-flutter

(Sawtooth pattern)

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30
Q

What is the rhythm?

A

Premature ventricular contraction

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31
Q

What is the rhythm?

A

1st-degree AV Block

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32
Q

What is the rhythm?

A

Bigeminy PVC

(PVC after every other normal beat)

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33
Q

What is the rhythm?

A

Trigeminy PVC

(PCV on the 3rd beat)

34
Q

What is the rhythm?

A

2nd degree Type 1 AV Block or Wenckebach

35
Q

What is the rhythm?

A

2nd degree Type 2 AV Block

36
Q

What is the rhythm?

A

Complete heart block or 3rd degree AVB

37
Q

What is the rhythm?

A

Vtach

(150-180 bpm)

38
Q

What is the rhythm?

A

Vfib

39
Q

Polymorphic vtach is also known as _________-

A

Torsades de Pointes

40
Q

How do you treat V-fib?

A

Defibrillation (electricity)

41
Q

How do you treat polymorphic vtach?

A

Mag and Electricity

42
Q

What general anesthetics will cause sensitive myocardium?

A

Halothane and enflurane

43
Q

How does cocaine and ketamine cause tachycardia?

A

Norepinephrine reuptake inhibitors

44
Q

What anesthetic gas can cause bradycardia in infants?

A

Too much Sevoflurane

45
Q

What anesthetic gas can cause prolonged QT during induction?

A

Desflurane

46
Q

Smashing the face mask will cause pressure to build up in the eye and will result in bradycardia due to what reflex?

A

Oculocardiac Reflex
Five and Dime Reflex

47
Q

A local anesthetic will cause a _____________ block.

Which will result in ___________.

A

Sympathetic

Severe Bradycardia

48
Q

What happens if you inject local anesthetic into the blood vessel?

What is the treatment?

A

Patient will become asystolic (and so will you)

Treat with lipid rescue

49
Q

Endotracheal intubation can put pressure on the _________, resulting in bradycardia and other hemodynamic disturbances.

A

vagus nerve.

50
Q

There can be autonomic reflexes during a surgical case stimulation of the carotid baroreceptors can cause_________.

A

Bradycardia

Prevent this by asking the surgeon to put more local anesthetic around the area or slap their hand

51
Q

During a laparoscopic case, insufflation can cause ____________ due to _________________.

A

Bradycardia due to loss of venous return.

52
Q

Tugging the ___________ or _________ will cause bradycardia.

A

Peritoneum; Cervix

Hysterectomy

53
Q

What cannulation procedure can cause dysrhythmias?

A

Central lines

54
Q

What is the rhythm?

A

Sinus Rhythm with Trigeminy

55
Q

What is the rhythm?

A

PSVT

56
Q

What is going on here?

A

Ventricular Paced

57
Q

What is the rhythm?

A

2nd degree AV Block Type II

58
Q

What is the rhythm?

A

Artifact

59
Q

What is the rhythm?

A

PAC

60
Q

What is the rhythm?

A

A-fib

Rhythm is irregularly irregular

61
Q

What is the rhythm?

A

Atrial Paced

62
Q

What is the rhythm?

A

Atrial Flutter

63
Q

What is the rhythm?

A

A-fib

Rhythm is irregularly irregular

64
Q

What is the rhythm?

A

Sinus Brady

65
Q

What is the rhythm?

A

Sinus Rhythm with PJC

See the retrograde p-wave?

66
Q

What is the rhythm?

A

V-fib

67
Q

What is the rhythm?

A

A-fib

68
Q

What is the rhythm?

A

SVT

69
Q

What is the rhythm?

A

Junctional Tachy

Sometimes there might not be the classic retrograde p-wave

70
Q

What is the rhythm?

A

Idioventricular Rhythm or IVR

71
Q

What is the rhythm?

A

AV Sequential Pacer

72
Q

What is the rhythm?

A

Idioventricular Rhythm or IVR

73
Q

What is the rhythm?

A

Artifact

Look at both leads, they do not correlate.

74
Q

What is the rhythm?

A

A-fib with Bigeminy

75
Q

What is the rhythm?

A

Sinus with Junctional Escape

Look at the fourth beat, no p-wave

76
Q

What is the rhythm?

A

Torsades de Pointes

Treat with mag and electricity

77
Q

What is the rhythm?

A

Junctional Rhythm

78
Q

What is the rhythm?

A

Sinus Rhythm with Hyperkalemia

79
Q

What is the rhythm?

A

A-fib

80
Q

What is the rhythm?

A

2nd degree Type 2 AVB

81
Q

What is the rhythm?

A

NSR with PVC

82
Q

What is the rhythm?

A

Sinus Arrest

Can be caused by adenosine or the patient being hypoxic

Health Assessment (spring 2024/mebs) (29 decks)

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