EKG

Question 1

P wave

Answer 1

Atrial depolarization begins

Question 2

PR-interval

Answer 2

Atrial depolarization complete

Question 3

Atrial depolarization + Ventricula depolarization

Answer 3

QRS complex

Question 4

ST-segment

Answer 4

Ventricular depolarization complete

Question 5

T wave

Answer 5

Ventricular repolarization begins

Question 6

Depolarization begins (Atria)

Answer 6

P wave

Question 7

Depolarization complete (Atria)

Answer 7

PR interval

Question 8

Repolarization (Atria)

Answer 8

QRS

Question 9

Depolarization begins (Ventricle)

Answer 9

QRS

Question 10

Depolarization complete (ventricular)

Answer 10

ST segment

Question 11

Repolarization begins

Answer 11

T wave

Question 12

Repolarization complete

Answer 12

After T wave

Question 13

PeRicarditis

Answer 13

can cause PR-interval depression

Question 14

Peaked T-waves

Answer 14

myocardial ischemia, kyperkalemia, LV hypertrophy, intercranial bleeding

Question 15

PR segment

Answer 15

isoelectric line, reference point for measuring ST elevation

Question 16

Hypokalemia (ECG changes)

Answer 16

increased PR interval, increased QT interval, T wave flattening, U wave

Question 17

Hyperkalemia (ECG changes)

Answer 17

peaked T waves, P wave flattening, PR prolongation, QRS prolongation , V-fib

Question 18

Hypercalcemia

Answer 18

shoRt QT interval

Question 19

Hypocalcemia

Answer 19

lOng QT interval

Question 20

Hypermagnesemia

Answer 20

heart block and arrest

Question 21

HypOmagnesemia

Answer 21

lOng QT interval (torsades risk)

Question 22

RCA: Inferior Heart

Answer 22

II, III, aVF

Question 23

Circumflex: Left Lateral Heart

Answer 23

I, aVL, V5, V6

Question 24

LCA: Anterior Heart, LAD

Answer 24

V1-V4

Question 25

Bipolar leads

Answer 25

I, II, III

Question 26

Limb leads

Answer 26

aVR, aVL, aVF

Question 27

Pericordial

Answer 27

V1-V6

Question 28

The mean electrical vector tends to point towards...

Answer 28

areas of hypertrophy (more tissue to depolarize) and away from areas of myocardial infarction

Question 29

If lead I and aVF point up then...

Answer 29

the axis is normal (two thumbs up)

Question 30

leads (R)eaching towards one another (I points down and aVF points up)

Answer 30

(R)ight axis deviation

Question 31

If leads are (L)eaving each other then...

Answer 31

(L)eft axis deviation

Question 32

If both leads point down then...

Answer 32

Extreme Right axis deviation (two thumbs down)

Question 33

Normal axis voltage

Answer 33

between -30 and +90

Question 34

more negative than -30

Answer 34

LEFT axis deviation

Question 35

more positive than +90

Answer 35

RIGHT axis deviation

Question 36

Causes of Right Axis Deviation

Answer 36

COPD, acute bronchospasm, for pulmonale, pulmonary HTN, pulmonary embolus

Question 37

Causes of Left Axis Deviation

Answer 37

Chronic HTN, LBBB, Aortic stenosis, Aortic insufficiency, MR