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733 > EKG > Flashcards

EKG Flashcards

1
Q

Inferior MI leads

A

II, III, aVF

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2
Q

Lateral MI leads

A

I, aVL, V5, V6

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3
Q

Posterior MI leads

A

AVR

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4
Q

Septal MI leads

A

V1, V2

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5
Q

Anterior MI leads

A

V3, V4

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6
Q

Time of a small box

A

0.04

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7
Q

Time of a big box

A

0.2

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8
Q

Number of Boxes and Rate

A

1 box-300 bpm
2 boxes- 150 bpm
3 boxes- 100 bpm
4 boxes- 75 bpm

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9
Q

Best place to look for p waves

A

Inferior limb leads

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10
Q

Define first degree AV block

A

Delayed conduction through AV node

Longer PR interval >200ms

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11
Q

2nd degree AV block
Aka Mobitz 1
Aka Wenckebach

A

Progressively longer PR interval with a non conducted (dropped) beat

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12
Q

2nd degree AV block Mobitz II

A

PR interval is constant with intermittent dropped beat

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13
Q

3rd degree heart block

A

No association between QRS and P waves, often more p waves than QRS- higher atrial rate

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14
Q

Inverted p waves indicate:

A

Lower atrial or junctional rhythms with retrograde conduction…

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15
Q

Know the axis

A
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16
Q

Method for determining QRS axis

A
  1. Find isoelectric lead- direction of vector is perpendicular to this lead
  2. Choose lead that is 90 degrees away
  3. If QRS is +, this is the axis
  4. If QRS is -, axis is 180 degrees from this lead
17
Q

Causes of right axis deviation

A

RV strain (PE)

COPD (pulmonary hypertension)

Lateral STEMI

18
Q

Causes of Left axis deviation

A

LBBB

Inferior MI

19
Q

Wave characteristics in left atrial enlargement

A

Lead II Bifid P wave- (two connected waves)

Lead V1- biphasic

20
Q

Right atrial enlargement

A

Peaked p wave (p pulmonale) >2.5mm leads II, III

21
Q

Sokolow- Lyon index

A

EKG criteria for ventricular hypertrophy

S in V1 + R in V5 >35mm….

22
Q

Pattern of strain in EKG

A

Downsloping ST depression with rapid UPSLOPE

23
Q

Pathological Q waves

A

> 2mm deep
25% of QRS complex
ST/T abnormalities with Qs suggest true infarct

Small Qs are normal

24
Q

ISCHEMIA in ST depression

A

> 1mm of horizontal or downsloping ST depression 60-80 msec after J point

25
Q

Indications of acute posterior STEMI on EKG

A

Depression in V1-3 anterior

ST elevation in V7-9 posterior…

26
Q

J point elevation

A

Can be benign

Osborn waves with hypothermia (notch?)

Widespread across ekg

<2mm

No reciprocal st depression

27
Q

Pericarditis

A

Widespread concave ST elevation

PR depression

Reciprocal ST depression aVR and V1

28
Q

Bundle branch blocks osmosis

A
29
Q

Kaylie’s MI regions

A
30
Q

Small box mm size

A

1 mm

31
Q

Large box size mm

A

5mm

32
Q

First sign of transmural injury

A

Broad peaked T waves

Will progress to ST elevation

33
Q

First sign of transmural injury

A

Broad peaked T waves

Will progress to ST elevation

34
Q

PE EKG pattern

A

However, the “S1Q3T3” pattern of acute cor pulmonale is classic; this is termed the McGinn-White Sign. A large S wave in lead I, a Q wave in lead III and an inverted T wave in lead III together indicate acute right heart strain.

35
Q

J wave

A

J wave- widespread (like pericarditis) makes sense in the setting of hypothermia, no reciprocal changes, less than 2mm, notching present in inferior leads

36
Q

J wave

A

J wave- widespread (like pericarditis) makes sense in the setting of hypothermia, no reciprocal changes, less than 2mm, notching present in inferior leads

37
Q

Which leads show reciprocal ST depression in pericarditis

A

aVR and V1

38
Q

Acls h’s

A

Hypovolemia
Hypoxia
Hydrogen ion acidosis
Hypo/hyperkalemia
Hypothermia

733 (10 decks)

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