Conduction of the Heart

Question 1

electrical event parts

Answer 1

SA node, AV node, AV bundle (bundle of His), bundle branches, Perkinjee fibers

Question 2

SA node

Answer 2

• “pace-maker”

- initiates signaling through the wall of the atria

Question 3

AV node

Answer 3

• receives signal from SA node
• delays impulse to ventricles
• amplifies signal

Question 4

AV bundle

Answer 4

• (bundle of His)
• at the superior end of interventricular septum
• forks into bundle branches

Question 5

Perkinjee fibers

Answer 5

gives signal to epicardium and endocardium

Question 6

rapid depolarization occurs in __________ through ________

Answer 6

nodal cells, intercalated discs

Question 7

miscommunication of electrical events

Answer 7

arrhythmia

Question 8

types of arrhythmia

Answer 8

tachycardia and bradycardia

Question 9

how are competencies of the electrical events measured?

Answer 9

EKG

Question 10

mechanical events

Answer 10

atrial systole and ventricular systole

Question 11

atrial systole

Answer 11

• ventricular diastole
• av valves open
• semilunar valves closed

Question 12

ventricular systole

Answer 12

• atrial diastole
• av valves closed
• semilunar valves open
• move blood out of heart

Question 13

depolarization = _______

Answer 13

systole

Question 14

repolarization = _______

Answer 14

diastole

Question 15

“lub” dub

Answer 15

AV valves close

Question 16

lub “dub”

Answer 16

semilunar valves close

Question 17

abnormalities in mechanical events

Answer 17

heart murmur

Question 18

mitral valve prolapse

Answer 18

lazy bicuspid valve that leads to backwash from left ventricle to the left atria