Download presentation

Presentation is loading. Please wait.

Published byKellen Burlison Modified over 2 years ago

1
Cardiac Output: And Influencing Factors

2
Cardiac Output Amount of blood pumped out by each ventricle in 1 min CO = HR x SV

3
Cardiac Reserve The difference between resting and maximal CO

4
Stroke Volume SV = EDV – ESV –EDV (volume of blood in ventricle after diastole) –ESV (volume of blood remaining in ventricle after contraction) –With each beat, ~ 60% of blood in chambers is emptied

5
Frank-Starling law of the heart Preload = critical factor in determining SV

6
Preload Degree to which cardiac cells are stretched before contraction –Optimal length determined by: If max # of cross bridge attachments occur If max force of contraction occurs

7
Venous Return The volume of blood returning to heart and stretching ventricles If venous return increases, EDV increases; therefore SV increases Left and right ventricles have equal venous return; therefore blood does not “pool” or backflow in heart

8
Contractility Contractile strength of heart (due to increased CA 2+ ) Causes increased release of blood (therefore lower ESV)

9
Afterload Force to eject blood from ventricles Constant in healthy people; lower in people with hypertension (therefore increases ESV and decreases SV)

Similar presentations

OK

OCT 2009Dr Nyoman W / Dr DENNY AGUSTININGSIH1 THE CARDIAC CYCLE What is the cardiac cycle. The cardiac cycle is the sequence of events that occur when.

OCT 2009Dr Nyoman W / Dr DENNY AGUSTININGSIH1 THE CARDIAC CYCLE What is the cardiac cycle. The cardiac cycle is the sequence of events that occur when.

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on bluetooth communications Ppt on congruent triangles Ppt on water scarcity in the middle east Ppt on bluetooth with slides Download ppt on northern plains of india Ppt on energy cogeneration plant Ppt on condition monitoring solutions Ppt on 2 stroke ic engine efficiency Ppt on types of web browser Ppt on hcl technologies ltd