Advanced EKG

Question 1

Left axis deviation is a main cardiac vector in what range?

Answer 1

-30 to -90

Question 2

Possible causes of a L axis deviation

Answer 2

1. LVH

2. Inferior wall MI

Question 3

Right axis deviation is a main cardiac vector in what approximate ranges?

Answer 3

90/100/110 to 180

Question 4

Possible causes of R axis deviation

Answer 4

1. RVH
2. Young age
3. Dextrocardia

Question 5

Extreme R axis deviation is a main cardiac vector within what range?

Answer 5

-90 to 180

Question 6

For the QRS to be upright in lead II, the MEA must be between

Answer 6

-29 and 149 degrees

Question 7

For the QRS to be inverted in lead II, the MEA must be between

Answer 7

-31 and 151 degrees

Question 8

For the QRS to be equiphasic in lead II, the MEA must be

Answer 8

-30 or 150 degrees

Question 9

If a patient has a normal QRS axis, there will always be a (positive/negative) R deflection in lead aVR

Answer 9

Negative

Question 10

If a patient has a normal QRS axis, there will always be a (positive/negative) deflection in lead II

Answer 10

Positive

Question 11

If a patient has a normal QRS axis, lead I is usually (upright/inverted)

Answer 11

upright

Question 12

If a patient has a LAD, there will be a (positive/negative) deflection in lead I

Answer 12

Positive

Question 13

If a patient has a LAD, there will be a (positive/negative) deflection in leads II, III, aVF

Answer 13

Negative

Question 14

What separates a LAD from a normal QRS axis ECG?

Answer 14

Negative R deflection in lead II

Question 15

If a patient has a RAD, there will be a (positive/negative) deflection in leads III and aVF

Answer 15

Positive

Question 16

If a patient has a RAD, there will be a (positive/negative) deflection in leads I and aVL

Answer 16

Negative

Question 17

Right precordial leads

Answer 17

V1 and V2

Question 18

Left precordial leads

Answer 18

V3-V6

Question 19

Why does SSS occur?

Answer 19

Malfunctioning SA node

Question 20

How is MAT treated?

Answer 20

Antiarrhythmics (magnesium, verapamil/diltiazem, metoprolol)

Question 21

ECG description for RBBB

Answer 21

1. 2 R waves in V1/V2

2. Broad, slurred S waves in V5/V6

Question 22

The time from the beginning of the QRS complex to the peak of the QRS complex

Answer 22

Intrinsicoid deflection

Question 23

ECG description for LBBB

Answer 23

1. RsR in leads I, aVL, V5/V6
2. Deep S wave in V1/V2
3. ST depression and/or T wave inversion in leads I, aVL, V5/V6

Question 24

Which aberrancy is more common?

Answer 24

RBBB

Question 25

ECG description for RAE

Answer 25

1. Tall P waves >2.5 mm in I, II, III | 2. Tall P waves >1.5 in V1/V2

Question 26

ECG description for LAE

Answer 26

1. Wide P wave in limb leads >120 msec | 2. Negative or biphasic P wave in V1, V2 (>1mm in depth or width)

Question 27

ECG description for RVH

Answer 27

1. Tall R waves in V1 2. Deep S waves in V5-V6 3. R (in V1) + S (in V5 or V6) is >10.5 mm

Question 28

ECG description for LVH

Answer 28

1. Deep S waves in V1 2. Tall R waves in V5/V6 3. S (V1 or V2) + R (V5 or V6) is >35mm

Question 29

R coronary artery supplies

Answer 29

1. SA node 2. AV node 3. Inferior wall 4. Posterior wall 5. Inferior 1/3 of ventricular septum

Question 30

L main coronary artery supplies

Answer 30

``` LAD 1. Anterior L ventricle 2. Ventricular septum Circumflex 1. Posterior left ventricle 2. Lateral left ventricle ```

Question 31

Leads and blood supply for inferior wall

Answer 31

II, III, aVF | R coronary artery

Question 32

Leads and blood supply for lateral wall

Answer 32

I, aVL, V5, V6 | Circumflex artery

Question 33

Leads and blood supply for septum

Answer 33

V1, V2 | LADA

Question 34

Leads and blood supply for anterior wall

Answer 34

V3, V4 | LADA