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ECG > Junctional, Ventricular Dysrhythmia & AV Blocks > Flashcards

Junctional, Ventricular Dysrhythmia & AV Blocks Flashcards

1
Q

If P waves can be seen in a junctional rhythm, they would appear inverted in which leads?

A

II, III, aVF (inferior leads)

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2
Q

Inverted P waves with a short or absent PR interval is indicative of…

A

junctional dysrhythmia

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3
Q

a single early impulse arriving from the AV junction…

A

premature junctional contraction

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4
Q

Rhythm: Irregular, one premature beat

P Wave: inverted, may be after or in the QRS

P-R Interval: short ( < 0.12s)

A

premature junctional contraction

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5
Q

If you can’t decide whether a rhythm is atrial or junctional arrhythmia, what can determine it as junctional?

A

shortened PR (impulse was generated lower down, so therefore shorter duration)

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6
Q

Rate: 40 - 60 bpm

P waves: inverted in leads II, III, aVF

PR Interval: short (< 0.12s)

A

Junctional Escape Rhythm

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7
Q

Rate: 60 - 100 bpm

P waves: inverted or absent in leads II, III, aVF

PR Interval: short (< 0.12s)

A

Accelerated junctional rhythm

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8
Q

Rate: 100 - 180

P waves: inverted, may be hidden in or occur after QRS

PR: shortened

A

Junctional Tachycardia

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9
Q

What class of dysrhythmias?

Wide, bizarre QRS complexes > 0.12s

T waves in opposite direction of R wave

No P waves

A

ventricular dysrhythmias

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10
Q

Rhythm: Irregular due to one premature beat

P waves: not visible

QRS: wide, bizarre ( > 0.12s)

T waves: opposite direction of R wave

A

Premature Ventricular Complex

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11
Q

Is there a full compensatory pause after a PVC?

A

yes

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12
Q

PVCs that look the same are called ______ and are (more/less) dangerous

A

unifocal, more dangerous

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13
Q

PVCs that look different from one another are called…

A

multifocal

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14
Q

What is it called when 2 PVCs occur in a row, what does this signify?

A

couplet, extremely irritable ventricles

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15
Q

a couplet of PVCs can cause…

A

lethal arrhythmia

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16
Q

PVCs that fall between two regular complexes and don’t disrupt the normal cycle are called…

A

interpolated PVCs

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17
Q

PVCs occurring on or near the previous T wave are called _______. they may precipitate (2)

A

R-on-T PVCs

precipitate V tach or V fib

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18
Q

Rate: 20 - 40 bpm
Rhythm: Regular

P waves: not visible

QRS: wide, bizarre, ( > 0.12s)

T waves: opposite direction of R wave

A

idioventricular rhythm

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19
Q

What is the rhythm of last resort?

A

idioventricular rhythm

20
Q

if there is one idioventricular beat, what is it called?

A

ventricular escape beat

21
Q

Rate: 40 - 100 bpm
Rhythm: regular

P waves: absent

QRS: wide, bizarre, ( > 0.12s)

T waves: opposite direction of R wave

A

accelerated idioventricular rhythm

22
Q

Rate: 100 - 250

P waves: absent

QRS: wide, bizarre, ( > 0.12s)

T waves: opposite direction of R wave

A

Ventricular tachycardia

23
Q

3 or more PVCs in a row indicates…

A

ventricular tachycardia

24
Q

VT may come in a burst of 6 to 10, or may persist. Persistant VT is called

A

sustained VT

25
Q

if the appearance of each QRS complex in VT are similar, it is called…

A

monomorphic

26
Q

If the QRS appearance varies considerably among complexes in VT, it is called

A

polymorphic

27
Q

This is a unique polymorphic VT associated with prolonged QT from dugs or lyte imbalances

A

Torsades de Pointes

28
Q

torsades (TdP) is managed via ______ if cardiac arrest, or ______ if not in cardiac arrest.

A

cardiac arrest = defibrilation

non-cardiac arrest = magnesium sulfate

29
Q

Ventricular fibrillation has what physical three characteristics

A

cardiac arrest
unresponsive
pulseless

30
Q

Rate: 300 - 500
Rhythm: totally chaotic
QRS: illogical wavy, chaotic

A

ventricular fibrillation

31
Q

complete cessation of cardiac output represented by a flat line

A

asystole

32
Q

organized electrical rhythm on ECG, but pulseless, apneic patient

A

PEA

33
Q

The below are reversible causes of…

hypovolemia,
pericardial tamponade, tension pneumothorax,
massive acute MI, drug overdose,

A

PEA

34
Q

What type of AV block?

consistent delay in AV node conduction

A

1st degree

35
Q

What type of AV block?

intermittent block at AV node, progressive P-R interval lengthening

A

2nd degree Type I

36
Q

What type of AV block?

intermittent block at the bundle of his or bundle branches

some atrial impulses don’t get conducted to ventricles

A

2nd degree Type II

37
Q

What type of AV block?

complete block of conduction at or below the AV node. Atrial impulses never reach the ventricles

A

3rd degree AV block

38
Q

Regular rhythm

P Waves: normal

QRS: normal

P-R interval: prolonged ( > 0.20s)

A

1st degree AV block

39
Q

Rate: normal (atria)
Rhythm: patterned irregularity

P waves: present normal looking. Not all followed by QRS

PR Interval: Progressive lengthening until a complex is dropped

A

2nd Degree AV Block Type I

“Wenckebach” or “Mobitz I”

40
Q

PR interval prolonged, but the duration of PR interval remains constant

More P waves than QRS complexes

A

2nd degree AV Type II

41
Q

PR interval is prolonged

every other p wave is conducted

A

2:1 AV block

42
Q

Is type 1 or type 2 AV block more serious?

A

Type II

43
Q

3rd degree AV block is also called…

A

complete heart block

44
Q

QRS complexes in 3rd degree AV block would appear wide under what condition?

A

escape focus is ventricular

45
Q

Rate: normal (atria)

rhythm: normal in atria and ventricles, but not related

P waves: normal, but not related to QRS

March thru QRS complexes

A

3rd degree AV block

46
Q

If ventricular rhythm in a 3rd degree AV block is between 40-60, where is the focus/

A

Junction

47
Q

If ventricular rhythm in 3rd degree AV block is 20-40, where is the focus?

A

ventricles

ECG (9 decks)

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