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sg5 > ECG part 2 (incomplete, important info) > Flashcards

ECG part 2 (incomplete, important info) Flashcards

1
Q

PR interval short vs long shows what

A

less 3 boxes: preexcitation syndrome

more 5 boxes: AV node block (some block)

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2
Q

long QT main danger

A

predisposes to torsades de pointe

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3
Q

main causes of short QT

A

hypercalcemia

tachycardia

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4
Q

main causes of long QT

A

*antiarrhythmic drugs
hypocalcemia
hypokalemia
MI

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5
Q

left axis deviation noticed how

A

negative QRS on lead 2

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6
Q

right axis deviation noticed how

A

negative QRS on lead 1

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7
Q

what left axis deviation can show

A

MI
left anterior fascicular block
LV hypertrophy

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8
Q

what right axis deviation can show

A

RV hypertrophy
acute right heart strain (massive PE)
left posterior fascicular block

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9
Q

2 P wave abnormalities

A

LA enlargement or RA enlargement

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10
Q

how see RA enlargement

A

lead II: higher first bump on P

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11
Q

how see LA enlargement

A

lead II: higher second bump on P

V1: amplitude of P wave 2nd bump greater than 1st bump

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12
Q

P waves best seen where

A

II and V1

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13
Q

3 abnormalities of QRS

A

ventricular hypertrophy, bundle branch blocks, pathologic Q waves in MI

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14
Q

how to see RV hypertrophy

A

Right axis deviation (lead I)

R greater than S in V1

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15
Q

how to see LV hypertrophy (simple)

A

Left axis deviation (lead II)

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16
Q

how to see LV hypertrophy (complicated criteria)

A

R in lead I 15 mm+
R in aVL 15 mm+
S in V1 + R in V5 or V6 35mm+

17
Q

how to see bundle branch block in general

A

QRS 2.5-3 boxes: incomplete block

QRS 3+ boxes: complete block

18
Q

how to see right bundle branch block

A

bunny ears in V1 and V3

19
Q

how to see left bundle branch block

A

bunny ears in lead I, aVL, V5 and V6

20
Q

pathologic Q wave description

A

width 1 box +

depth 25% of QRS or more

21
Q

4 localizations of MI

A

anteroseptal
anterolateral
anteroapical
inferior

22
Q

anteroseptal MI: path Q waves where

A

V1 and V2

23
Q

anterolateral MI: path Q waves where

A

lead 1, aVL, V5, V6

24
Q

anteroapical MI: path Q waves where

A

V3 and V4

25
Q

Inferior MI: path Q waves where

A

lead II, lead III, aVF

26
Q

how to see transient MI on ECG

A

ST depression

T wave inversion

27
Q

how to see acute MI on ECG

A

T wave elevation and permanent Q waves show old MI

28
Q

how to see acute non ST segment elevation MI on ECG

A

ST depression or T wave inversion (these don’t go away)

29
Q

TF: all ST T segments pathologies caused by MI

A

false, other causes like pericarditis

30
Q

pericarditis findings on ECG

A

ST elevations on most leads (not only ones affected by infarct as in MI)

sg5 (55 decks)

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