Electrophysiology

Question 0

Conductivity

Answer 0

The ability of the cardiac cell to receive an electrical implies and conduct it to an anointing cardiac cell..

Question 1

Excitability

Answer 1

The ability of a cardiac cell to responded to an outside stimulus.

Question 2

Contractility

Answer 2

The ability of myocardial cells to shorten in response to an impulse, which results in a contraction.

Question 3

Electrolytes

Answer 3

Elements or compounds that break into charge particles (ions) when melted or desolated in water or another solvents..

Question 4

Electrolytes which affect the function of the heart

Answer 4

Sodium (Na+)
Potassium (K+)
Calcium (Ca++)
Chloride (Cl-)

Question 5

Cardiac depolarization proceeds from the

Answer 5

endocardium to the epicardium.

Question 6

What is recorded on an ECG with atria stimulation and depolraized?

Answer 6

P wave

Question 7

What is recorded on an ECG when QRS complex is recorded?

Answer 7

Ventricle depolarization

Question 8

Contraction are the expected result of?

Answer 8

Depolarization

Question 9

Cardiac Repolarization proceeds from the

Answer 9

Epicardium to the endocardium

Question 10

ST segment and T waves represent?

Answer 10

Ventricular repolarization

Question 11

Phase 1,2,3 Cardiac action potential a referred to as?

Answer 11

Electrical systole

Question 12

Phase 4 of Cardiac action potential is referred to as?

Answer 12

Electrical diastole

Question 13

Phase 0 representation on the ECG?

Answer 13

QRS complex

Question 14

Phase 2 representation on ECG?

Answer 14

ST segment

Question 15

Phase 3 representation on ECG?

Answer 15

T wave

Question 16

Absolute refractory period ( effective refractory)

Answer 16

The cell will not respond to further stimulation

Question 17

Relative refractory period ( vulnerable period)

Answer 17

Cardiac cells have depolarizer to the threshold potential and can be stimulated to respond ( depolarize) Aka T wave

Question 18

SA intrinsic rate

Answer 18

60- 100

Question 19

AV junction pacemaker firing rate

Answer 19

40-60

Question 20

Bundle of His, receives blood from?

Answer 20

LF and posterior descending coronary arteries.

Question 21

Purkinje fibers pacemaker rate?

Answer 21

20-40

Question 22

Trigger activities result from?

Answer 22

Abnormal electrical impulses that occur during repolarization.

Question 23

Ectopic

Answer 23

Impulse originating from a source other that the SA

Question 24

Reentry

Answer 24

Spread of an impulse through tissue already stimulated by the same impulse.

Question 25

Escape (beat/rhythms)

Answer 25

Term used when the SA node slows or fails to initiate depolarization and a slower site spontaneously produces an impulse, assuming responsibility for pacing the heart.

Question 26

Normal QRS duration?

Answer 26

.11 sec or less

Question 27

Ventricle repolarization is represented by which ECG wave?

Answer 27

T

Question 28

PR intervals which are the same are said to be?

Answer 28

Constant

Question 29

PR intervals which increase until a QRS isn’t present is referred to as?

Answer 29

Lengthening

Question 30

PR interval that vary in duration and have no pattern are said to be?

Answer 30

Variable