Preload and Contractibility

4 important questions on Preload and Contractibility

What are the main determinants of the heart's performance as a pump?

  1. Preload
  2. Afterload
  3. Contractility
  4. Distensibility
  5. Heart rate
  6. Synergy of Contraction

Relationship of preload and contractility

High preload (EDV) = high force of contraction of the ventricles = high SV

What is the mechanism of preload and contractility's relationship?

Ventricular stretch increases fiber length, and thus greater overlap of filaments resulting in greater contractile force
  • Higher grades + faster learning
  • Never study anything twice
  • 100% sure, 100% understanding
Discover Study Smart

What is the Frank Starling Law?

It states that greater the EDV during diastole, greater the quantity of blood ejected during systole; this allows the heart to adapt to changes in blood load

The question on the page originate from the summary of the following study material:

  • A unique study and practice tool
  • Never study anything twice again
  • Get the grades you hope for
  • 100% sure, 100% understanding
Remember faster, study better. Scientifically proven.
Trustpilot Logo