Coronary Circulation + EKG

Question 1

P wave corresponds to

Answer 1

Atrial depolarization

Question 2

QRS complex corresponds to

Answer 2

Ventricular depolarization

Question 3

T wave corresponds to

Answer 3

Ventricular repolarization

Question 4

Depolarization causes

Answer 4

Muscle contraction

Question 5

Repolarization causes

Answer 5

Muscle relaxation

Question 6

Where does atrial repolarization (muscle relaxation) occur

Answer 6

QRS complex

Question 7

What are Purkinje fibers

Answer 7

Modified myocardial cells

Question 8

What is measured in the EKG

Answer 8

Muscle depolarization (muscle contraction)

Question 9

What cation causes contraction of myocytes

Answer 9

Calcium

Question 10

An increase in cytoplasmic calcium will cause

Answer 10

Higher contractility of myocytes

Question 11

Does potassium and sodium cause a physiological increase in myocyte contraction?

Answer 11

No, only intracytoplasmic Ca++

Question 12

Is [Na+] greater inside or outside the cell

Answer 12

Outside

Question 13

Is [K+] greater inside or outside the cell

Answer 13

Inside

Question 14

Myocyte cells are + or - charged inside

Answer 14

Negatively due to K+

Question 15

Definition of polarized cell

Answer 15

• resting potential inside the cell

+ resting potential outside the cell

Question 16

V1 and V2 leads observe

Answer 16

Ventricular septum

Question 17

V2 and V3 observe

Answer 17

Anterior wall of left ventricle

Question 18

V4 and V5 observe

Answer 18

The anterolateral wall of left ventricle

Question 19

Cara lateral seen at

Answer 19

I and aVL

Question 20

Cara anterior seen at

Answer 20

C1, C2, C3, C4

Question 21

Cara inferior seen at

Answer 21

II, III, aVF

Question 22

Acute heart attack seen at where in EKG

Answer 22

ST elevation at cara inferior: I, II, aVF

Question 23

Strategy to count the heart beat

Answer 23

QRS aligned with the lines and count square to square (300-150-100-75-60-59) until the next QRS

Question 24

Normal heart rate

Answer 24

60-100 beats per minute

Question 25

Normal P wave parameters

Answer 25

Positive and 3 small squares

Question 26

A negative P wave suggests

Answer 26

Dysrrythmia

Replace leads

Question 27

Normal PR parameters

Answer 27

Less than 1/2 big square

Question 28

If PR interval > half of a big square

Answer 28

Blockage dysrythmia

Question 29

Normal P - P interval

Answer 29

Same length between P peaks

Question 30

Normal QRS parameters

Answer 30

< 1/2 big square

Question 31

Checking axis deviation

Answer 31

Check the leads to see the most uniform (I, II, III, aVL, aVR, aVF)
Go to the circle and turn 90º either left or right to where there is another lead mark