Lab 18

Question 1

Focus lab 18

Answer 1

electrocardiogram, heart sounds, bp

Question 2

ECG graph

Answer 2

P wave, QRS complex, T wave

Question 3

Wiggers diagram

Answer 3

relationship between electrical, mechanical activity of heart and relative BP

Question 4

What tools were used in this lab 18

Answer 4

Cardiomicrophone, stethoscope, sphygmomanometer

Question 5

Semilunar valves go to ___ AV valves go to ______

Answer 5

the body, the ventricles

Question 6

Electrical activity in order heart

Answer 6

SA node->AV node, delay at bundle of his, left and right bundle branches, purkinje fibers.

Question 7

Depolarization towards a positive electrode gives a _____ deflection

Answer 7

+

Question 8

Depolarization towards a negative electrode (away from positive) gives a _____ deflection

Answer 8

-

Question 9

Lead ____ is across arms, lead ____ is from RA to LL, lead ____ is from LA to LL

Answer 9

1,2,3

Question 10

Systole is _____

Answer 10

heart at work

Question 11

Lub-dub noises are created by_____

Answer 11

valves slamming shut

Question 12

Korotkoff sounds

Answer 12

created by pulsatile flow through compressed artery - give systolic bp

Question 13

Nyquist rate

Answer 13

sampling frequency must be > 2f