conduction system of the heart

Question 1

what is the conduction system of the heart ?

Answer 1

nerve like cardiac cells that send electrical impulses to contract heart

Question 2

what are the 2 types of cardiac muscle cells

Answer 2

myocardial contractile cells and myocardial conducting cells

Question 3

what are myocardial contractile cells responsible for ?

Answer 3

contractions that pump blood

Question 4

what are myocardial conducting cells responsible for ?

Answer 4

initiating the electrical impulse that triggers muscle contraction

Question 5

what is the SA node called ?

Answer 5

the pacemaker of the heart

Question 6

what does the SA node do ?

Answer 6

causes both atria to contract, forcing blood into the ventricles

Question 7

what does the AV node do ?

Answer 7

sends an impulse to the AV bundle to finish contacting

Question 8

Where are the bundle branches located ?

Answer 8

the interventricular septum

Question 9

which bundle branch is thicker ?

Answer 9

the left (because the left ventricle is thicker)

Question 10

where do the bundle branches reach ?

Answer 10

the apex to connect to purkinje fibers

Question 11

What do purkinje fibers do ?

Answer 11

spread an electrical impulse all throughout the myocardium causing ventrical contraction

Question 12

what is a normal resting heart rate ?

Answer 12

60-100 beats per minute

Question 13

what is it called when your heart rate is below 60 bpm ?

Answer 13

bradycardium

Question 14

what is it called when your heart rate is above 100 bpm ?

Answer 14

tachycardium

Question 15

what is it called when you have an irregular heartbeat ?

Answer 15

arrhythmia

Question 16

if your arrhythmia becomes a serious problem, what can be done ?

Answer 16

you can get an artificial pacemaker implanted

Question 17

what is an artificial pacemaker ?

Answer 17

delivers electric impulses to the myocardium to make sure the heart is contracting enough to pump blood.

Question 18

what is an electrocardiogram ?

Answer 18

it checks electrical changes seen in heart activity

Question 19

what is an electrocardiogram used for ?

Answer 19

to reveal normal or abnormal heart function

Question 20

what does a P wave represent ?

Answer 20

atrial contraction

Question 21

what does the QRS represent ?

Answer 21

the ventricles contracting as the atria relaxes.

Question 22

what does the T wave represent ?

Answer 22

the ventricles relaxing

Question 23

what does a large P wave indicate ?

Answer 23

an enlarged atrium or valves that do not work

Question 24

what does a large Q wave represent ?

Answer 24

can be a sign of heart attack

Question 25

what does a suppressed or inverted Q wave indicate ?

Answer 25

an enlarged ventricle

Question 26

what can a large R wave indicate ?

Answer 26

an enlarged ventricle