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ECG > 141-171 > Flashcards

141-171 Flashcards

1
Q

In 3rd degree AV block we can find __ wave moving at - bpm, but bearing no relationship to the __ complexes.

A

P
60-100
QRS

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2
Q

What are the 3 criteria for RBBB?

A
  1. QRS>0.12 (wide)
  2. RSR’ in V1 and V2 (rabbit ears)+ST depression + T -wave inversion
  3. Reciprocal changes in V5, V6, I, and aVL
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3
Q

What are the 4 criteria for LBBB?

A
  1. QRS>0.12 (wide)
  2. Broad/notched R wave + prolonged upstroke in V5, V6, I, and aVL with ST depression and T-wave inversion
  3. Reciprocal changes in V1 and V2
  4. Left axis deviation may be present
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4
Q

BBB is diagnosed by looking at the width and configuration of the ___ complexes

A

QRS

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5
Q

_BBB is fairly common in otherwise normal hearts

A

R

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6
Q

_BBB rarely occurs in normal hearts

A

L

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7
Q

The term hemiblock refers to a conduction block of just one of which fascicles?

A

septal/left anterior/left posterior

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8
Q

Hemiblock applies only to _BBB

A

L

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9
Q

Hemiblocks cause ___

A

axis deviation

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10
Q

Left anterior hemiblock cause __ axis deviation between - degrees

A

left

-30 and -90

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11
Q

Left posterior hemiblock cause __ axis deviation

A

right

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12
Q

The QRS complex in hemiblocks is __, and there are no __ segment or __ wave changes

A

normal
ST
T

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13
Q

Which type of hemiblock is more common?

A

Left anterior

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14
Q

What does the term bifascicular block refers to?

A

The combination of either left anterior or left posterior hemiblock with RBBB

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15
Q

What are the 3 criteria for bifasicular block?

A
  1. QRS > 0.12 seconds
  2. RSR’ in V1 and V2
  3. Left axis deviation between -30 and -90
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16
Q

What is an incomplete BBB?

A

left/right BBB with rabbit ears in V1, but QRS is between 0.10-0.12 seconds

17
Q

How do you call the bypass pathway in Wolff Parkinson White syndrome?

A

bundle of Kent

18
Q

WPW criteria: X3

A
  1. PR interval <0.12 (less than 3 small cubes)
  2. wide QRS complexes
  3. Delta wave
19
Q

What is the reason for wide QRS in WPW?

A

premature ventricular activation

20
Q

What are the 4 stages of MI seen on an ECG?

A
  1. T-wave peaking
  2. T- wave inversion
  3. ST-segment elevation
  4. formation of Q wave
21
Q

In MI T waves inversion will persist for __ to __

A

months to years

22
Q

In MI T-waves are inverted in a __ fasion

A

symmetric

23
Q

Inferior infraction is often caused by occlusion of the __ coronary artery. It can be seen in leads ,,_.

A

right
II
III
aVF

24
Q

Lateral infraction is often caused by occlusion of the __ circumflex coronary artery. It can be seen in leads ,,,.

A 
left
I
aVL
V5
V6
25
Q

Anterior infraction is often caused by occlusion of the __ coronary artery. It can be seen in leads leads -

A

LAD

V1-6

26
Q

Posterior infraction is often caused by occlusion of the __ coronary artery. It can be seen by looking at__changes in the anterior leads, especially in __.

A

right
reciprocal
V1

27
Q

Which area of the heart does it involve?

  1. Inferior infraction?
  2. lateral infraction?
  3. anterior infraction?
  4. posterior infraction?
A
  1. diaphragmatic surface
  2. left lateral wall
  3. anterior surface of the left ventricle
  4. posterior surface
28
Q

Hyperkalemia will show __ waves peaking, __ interval prolongation, flattening of the __ wave and ultimately the __ complex widens until it merges with the T wave- forming __ wave pattern

A 
T
PR
P
QRS
sine
29
Q

What are the 4 changes seen in an ECG of a patient with hypokalemia?

A
  1. ST-segment depression
  2. flattening of the T wave
  3. prolongation of the QT interval
  4. U waves
30
Q

Hypercalcemia __ the QT interval, while hypocalcemia __ it. Remember that QT prolongation may lead to __

A

prolongs
shortens
Torsade de pointes

31
Q

What are the 8 steps when reading an ECG?

A
  1. heart rate
  2. intervals
  3. axis
  4. rhythm
  5. AV blocks (AV/BBB/hemi)
  6. preexcitation
  7. enlargement and hypertrophy
  8. coronary artery disease

ECG (5 decks)

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