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
Indications of acute posterior STEMI on EKG
Depression in V1-3 anterior ST elevation in V7-9 posterior…
26
J point elevation
Can be benign Osborn waves with hypothermia (notch?) Widespread across ekg <2mm No reciprocal st depression
27
Pericarditis
Widespread concave ST elevation PR depression Reciprocal ST depression aVR and V1
28
Bundle branch blocks osmosis
29
Kaylie’s MI regions
30
Small box mm size
1 mm
31
Large box size mm
5mm
32
First sign of transmural injury
Broad peaked T waves Will progress to ST elevation
33
First sign of transmural injury
Broad peaked T waves Will progress to ST elevation
34
PE EKG pattern
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
J wave
J wave- widespread (like pericarditis) makes sense in the setting of hypothermia, no reciprocal changes, less than 2mm, notching present in inferior leads
36
J wave
J wave- widespread (like pericarditis) makes sense in the setting of hypothermia, no reciprocal changes, less than 2mm, notching present in inferior leads
37
Which leads show reciprocal ST depression in pericarditis
aVR and V1
38
Acls h’s
Hypovolemia Hypoxia Hydrogen ion acidosis Hypo/hyperkalemia Hypothermia