Cardiac Cycle

Question 1

Cardiac Cycle

Answer 1

what happens during a heartbeat

Question 2

What happens to blood during diastole phase?

Answer 2

blood is filled up

Question 3

What does it mean if diastole is shorter than systole? Talk about heart volume and stroke volume

Answer 3

• Heart rate gets faster because it doesn’t have time to fill
• less blood volume so stroke volume decreases

Question 4

Ventricular Diastole (1st Step)

Answer 4

• atria and ventricles fill up with blood

Question 5

Atrial Systole (2nd Step)

Answer 5

• atria will contract
• blood is pushed to ventricles

Question 6

Early Ventricular Systole / Isolvolumteric Contraction Phase (3rd step)

Answer 6

• Ventricles start to contract
• build up pressure in ventricle to make it greater than that of arteries

Question 7

Early Ventricular Diastole/ Isovolumetric Relaxations (5th step)

Answer 7

• When the blood is pushed out, you need to reduce ventricular pressure
• heart relaxes

Question 8

Ejection Ventricular Systole (4th Step)

Answer 8

• Once the pressure of ventricles is higher than that or arteries, blood is pushed out

Question 9

What is the pressure in ventricular diastole?

Answer 9

low ventricular pressure

Question 10

What happens to volume in diastole?

Answer 10

Goes up

Question 11

What happens to the ventricular volume in atrial systole? What about pressure?

Answer 11

still goes up and low pressure

Question 12

What happens to pressure and volume in isolvolumetric contraction?

Answer 12

• volume stays same
• pressure goes up

Question 13

what happens to volume and pressure in ejection?

Answer 13

• goes down

Question 14

what happens to volume and pressure in isovolumetric relaxation

Answer 14

• volume remains same
• pressure decreases

Question 15

Which valves are open and closed during ventricular diastole?

Answer 15

• Bicuspid and Mitral are open
• Pulmonic and Aortic are closed
• note: remains the same in atrial systole?

Question 16

Which valves are open and closed during isovolumetric contraction?

Answer 16

all are closed

Question 17

Which valves are open and closed during ejection?

Answer 17

• aortic and pulmonic are open
• mitral and tricuspid are closed

Question 18

Which valves are open and closed during isovolumetric relaxation?

Question 19

What sound is made during isovolumetric relaxation?

Answer 19

S2 - dub

Question 20

How is atrial systole shown on EKG?

Answer 20

• P Wave

Question 21

How is isovolumetric concentration shown on EKG?

Answer 21

QRS complex