L2. Overview of Cardiac Function Flashcards by Pikachu Senpai | Brainscape

Q

Diastole

A

Relaxation

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Systole

A

Contraction

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Atrial Systole

A

Atrium Depolarization from SA node impulses
Atria squeezes more blood into ventricles

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Isovolumic Ventricular Contraction ( IVC)

A

All valves are closed
Volume in ventricles remains unchanged
Myocardium is contracting and pressure is rising sharply.
Ventricular contraction starts at the apex of the heart
Ventricular Pressure increases as AV node send impulses to induce contraction
P ( ventricle) exceeds P (aorta)
Semilunar valves open to eject blood from the heart

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Ventricular Ejection

A

Myocardium continues to contract
Contraction reaches max effect then stops, but blood is still ejecting,

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Isovolumic Ventricular Relaxation

A

All valves are closed
Myocardium is relaxing
P ( ventricle ) is decreasing

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Ventricular filling

A

P (ventricular) falls below the atrial pressure
AV valves open

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Pacemaker cells

A

SA node (Posterior wall of right Atrium) - highest degree of automaticity
AV node
Cause ventricular contraction
No plateau phase
3 phases (0,3,4)
Slow rate of depolarization

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Non-Pacemaker cells

A

Rapid Rate of Depolarization
Plateau phase (2)
5 phases ( 0-4)

How well did you know this?

1

Not at all

2

3

4

5

Perfectly