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CPR > Normal ECG > Flashcards

Normal ECG Flashcards

1
Q

P wave

A

Atrial depolarization

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2
Q

In what leads is the P wave upright?

A

1, 2, AVF, V4, V5, V6

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3
Q

In what leads is the P wave inverted?

A

AVR

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4
Q

PR Interval

A

From the beginning of the P wave to the beginning of the QRS complex

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5
Q

What does the PR interval represent?

A

Time from the SA node to the ventricular myocyte

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6
Q

Normally, the PR interval should be less than?

A

0.2 seconds

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7
Q

Each little box on an ECG represents ____ mm and ____ seconds

A

1 mm

0.04 seconds

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8
Q

Each bigger box (dark line to dark line) on an ECG represents _____ mm and ____ seconds

A

5 mm

0.20 seconds

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9
Q

QRS complex

A

Ventricular depolarization

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10
Q

The QRS complex should be less than ___ seconds

A

0.10

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11
Q

Q waves should be less than ____ seconds in width

A

0.03

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12
Q

ST segment takes place after?

A

QRS complex

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13
Q

Normally, the ST segment is?

A

Isoelectric (baseline)

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14
Q

The ST segment is NEVER normally depressed more than ___ mm

A

1/2

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15
Q

If the ST segment is elevated more than ___ mm, it could indicate subepicardial ischemia

A

1-2

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16
Q

If the ST segment is depressed more than 1/2 mm, it could indicate?

A

Subendocardial ischemia

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17
Q

T wave

A

Ventricular repolarization

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18
Q

In what leads is the T wave upright?

A

1, 2, V3 - V6

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19
Q

In what leads is the T wave inverted?

A

AVR

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20
Q

In standard leads, the T wave should not be taller than?

A

5 mm

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21
Q

In precordial leads, the T wave should not be taller than?

A

10 mm

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22
Q

QT interval

A

Ventricular systole

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23
Q

What is a U wave associated with?

A

Hypokalemia

24
Q

What are the bipolar limb leads?

25
Q

What are the augmented limb leads?

A

AVR, AVL, AVF

26
Q

What are the precordial chest leads?

27
Q

What leads take measurements from the lateral body wall?

A

1, AVL, V5, V6

28
Q

What leads take measurements from the inferior side?

29
Q

AV block occurs when?

A

PR interval&raquo_space; 0.2 seconds

30
Q

For the QRS complex, what is the 1st downward deflection known as?

31
Q

For the QRS complex, what is the 1st upright deflection known as?

32
Q

For the QRS complex, if a Q wave does NOT occur, what is the 1st upright deflection known as?

33
Q

For the QRS complex, what is the downward deflection following an R wave known as?

34
Q

If there are multiple R and S waves, they get what symbol designation?

35
Q

What is classified as a sinus rhythm?

A

When a P wave occurs before every QRS complex

36
Q

What are the best leads for reading P waves?

37
Q

Heart rate greater than 100

A

Tachycardia

38
Q

Heart rate slower than 60

A

Bradycardia

39
Q

What are the numbers for calculating heart rate starting with the next dark line after the aligned R wave?

A 
300
150
100
75
60
50
43
40
Q

Lead I is perpendicular to?

41
Q

Lead II is perpendicular to?

42
Q

Lead III is perpendicular to?

43
Q

The 6 limb leads (I, II, III, AVF, AVL, AVR) intersect where?

44
Q

Lead I is what degrees?

45
Q

Lead AVR is what degrees?

A

+30 and -150

46
Q

Lead II is what degrees?

A

+60 and -120

47
Q

Lead AVF is what degrees?

A

+90 and -90

48
Q

Lead III is what degrees?

A

+120 and -60

49
Q

Lead AVL is what degrees?

A

+150 and -30

50
Q

A normal axis

A

Between 0 and +90

51
Q

In what 2 leads are you looking for deflections for the axis?

A

Lead I and AVF

52
Q

Normal axis deflections

A

Lead I: Positive

Lead AVF: Positive

53
Q

Left axis

A

Between 0 and -90

54
Q

Left axis deflections

A

Lead I: Positive

Lead AVF: Negative

55
Q

Right axis

A

Between +90 and 180

56
Q

Right axis deflections

A

Lead I: Negative

Lead AVF: Positive

CPR (48 decks)

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