Cardiac Cycle

Question 1

The Cardiac cycle on an EKG is what?

Answer 1

P wave, QRS wave, T wave

Question 2

What do P, QRS, and T stand for?

Answer 2

P wave is atrial depolarization, QRS is ventricular depolarization, T is ventricular repolarization

Question 3

Are valves open or closed during isovolumetric contraction and isovolumetric relaxation?

Answer 3

All are closed

Question 4

First heart sound is what?

Answer 4

S1, This occurs when the mitral valve closes after Atrial systole. It is not the sound of the valve closing, its actually the sound of blood oscillating through the ventricle. Low pitch, longer, more intense

Question 5

Second heart sound?

Answer 5

S2. This occurs when the aortic and pulmonic veins close and is the oscillation of blood in the pulmonary artery and the aorta.

Question 6

Third Heart SOund

Answer 6

Vibration of blood during ventricular filling. Occurs in early diastole. Only loud during heart failure.

Question 7

Fourth Heart Sound

Answer 7

Occurs during atrial contraction and is low in pitch and intensity

Question 8

Know the graphs on page 3

Answer 8

yup

Question 9

Know the Pressurve Volume graph

Answer 9

Yes

Question 10

When do Preload and afterload occur

Answer 10

Pre load occurs when the mitral valve closes after the ventricles have been filled.

Question 11

Afterload refers to the point at which the aortic valve opens after the ventricles have been contracted. Its just immediately prior to ejection

Answer 11

True

Question 12

Systolic pressure is what?

Answer 12

Peak pressure in the aorta

Question 13

Diastolic pressure is what>

Answer 13

Minimum pressure in the aorta

Question 14

Increased pre-load does what to stroke volume?

Answer 14

Increases it

Question 15

Increased afterload does what to stroke volume?

Answer 15

Decreases it

Question 16

Increaseing the contractility does what to stroke volume>

Answer 16

Increases it

Question 17

One way to compensate for increased afterload is to>

Answer 17

Increase contractility

Question 18

Describe how AV valves work?

Answer 18

If the atrial pressure is greater than ventricular pressure then the valves are open. If the ventricular pressure is greater than atrial pressure then the valves are closed.

Question 19

Work of the heart =

Answer 19

Pressure times volume