Determinants of Cardiac Output
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| Cardiac Output | volume of blood pumped by each ventricle per minute
🗑
|
||||
| Stroke Volume | Volume of blood ejected per beat
🗑
|
||||
| Heart Rate | Number of heart beats/minute
🗑
|
||||
| Cardiac Output Equation | CO = HR x SV
🗑
|
||||
| Stroke Volume Equation | SV = EDV - ESV
🗑
|
||||
| Schematic for the SV component of the Equation | Preload (Starling Effect)
Contractility
Afterload
Compliance
🗑
|
||||
| Ejection Fraction | EF = (SV)/(EDV)
🗑
|
||||
| Inotropy | contractility
🗑
|
||||
| Starlings Law | As volume increases, length increases and the greater the contraction
🗑
|
||||
| Compliance Equation | (delta)V/(delta)P
🗑
|
||||
| Increasing Preload causes | Increasing EDP
Increasing EDV
Increases SV and CO
🗑
|
||||
| Decreased HR causes | less time for filling and results in a lesser force
🗑
|
||||
| Afterload | force it has to overcome (arterial pressure)
🗑
|
||||
| Increasing Afterload | Increases pre-ejection pressure
Increases ESV
Decreases SV and CO
🗑
|
||||
| Increasing contractility | Decreases ESV
Increases SV
🗑
|
||||
| Lowering Compliance | decreased EDV
Decreases SV and CO
🗑
|
||||
| length affects | tension and velocity
🗑
|
||||
| Ejection Fraction in normal health | 55%
🗑
|
||||
| What is the only way to change the slope of the left ventricular pressure | change contractility
🗑
|
||||
| What affects contractility? (3) | Positive inotropic effects
🗑
|
||||
| Postive inotropes caused by | open Ca channels
inhibition of the Na/Ca exchanger
Inhibit plasma membrane pump
Activations of B1 receptors
🗑
|
||||
| what cardiac drug induces positive inotropic effects? | Cardiac glycosides (digitalis)
🗑
|
||||
| Negative inotropes | Ca channel blockers
Low Ca
High extracellular Na
🗑
|
||||
| Determinants of O2 demand on the heart | afterload
extent of muscle shortening
heart rate
inotropic state
heart size
🗑
|
||||
| 60-90% of cardiac ATP derived from ________ | free fatty acids
🗑
|
||||
| Calculating CO using the Fick Principle: | "oxygen is the indicator"
🗑
|
||||
| Cardiac Output equation using Fick Principle | CO = O2 consumption / (O2 pulmonary vein - )2 pulmonary artery)
🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Created by:
tjamrose
Popular Physiology sets