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My Cardiology > ECG > Flashcards

ECG Flashcards

1
Q

what does the P wave on an ECG represent

A

Atrial depolarization

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2
Q

What is the PR interval on an ECG

A

The time from initial atrial depolarization to initial ventricular depolarization

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3
Q

What does the QRS complex on an ECG represent

A

depolarization of the ventricles

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4
Q

What section of the ECG corresponds to the plateau of ventricular action potential

A

The ST segment

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5
Q

What does the T wave on an ECG represent

A

ventricular repolarization

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6
Q

What does the QT interval on an ECG represent

A

The time from initial ventricular depolarization to ventricular repolarization

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7
Q

Which part of the heart depolarizes first

A

septum

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8
Q

in which direction does the ventricles depolarize

A

Left to right

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9
Q

What is a concordant ECG reading

A

when the QRS complex and T wave are both upright or both inverted

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10
Q

The P wave will be positive on all leads except

A

AVR

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11
Q

How many small squares should the P wave cover

A

2 small squares

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12
Q

How many small squares should the QRS wave cover

A

less than 3

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13
Q

Which wave is the vulnerable phase

A

T-wave

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14
Q

How many small squares should the PR interval cover

A

3-5 small squares

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15
Q

What is the equation for the correct QT interval

A

QT/ (sq rt RR)

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16
Q

How many small squares should the QT interval cover

A

11 small squares

17
Q

Which leads are the “septal leads”

A

V1 and V2

18
Q

Which leads correspond to the anterior surface of the heart

A

V1, V2, V3, V4

19
Q

Which leads correspond to the left anterior descending artery

A

V1, V2, V3, V4

20
Q

Which leads correspond to the lateral surface of the heart

A

V5 and V6

21
Q

Which leads correspond to the left circumflex artery

A

V5 and V6

22
Q

Which lead gives an isoelectric signal

A

aVL

23
Q

Which lead is almost inline with the cardiac axis

A

Lead II

24
Q

Which leads are at the diaphragmatic surface

A

II, III and aVF

25
Q

Which leads correspond to the left posterior descending artery

A

II, III and aVF

26
Q

A right axis deflection is usually due to which blockage of which fascicle

A

Posterior fascicle

27
Q

A left axis deflection is usually due to which blockage of which fascicle

A

Anterior fascicle

28
Q

A left axis deflection is usually due to which blockage of which artery

A

Left anterior descending

29
Q

Which lead is usually negatively deflected in a right axis deviation

A

Lead I

30
Q

Which lead is usually negatively deflected in a left axis deviation

A

Lead II

My Cardiology (21 decks)

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