×

Stroke volume - preload, sarcomere length and Frank -Starling law

6246

0

HWC

• Sarcomere length affects muscle tension and the force of contraction. • Increased muscle stretch (increased sarcomere length) at the beginning of contraction increases tension produced during the contraction. • A more forceful contraction ejects more blood, thus increasing stroke volume. • The relationship between preload stretch and stroke volume is known as the Frank-Starling law of the heart. • The greater the preload, the greater the sarcomere stretch, the greater the stroke volume. • The Frank-Starling law has limits. When cardiac muscle is overstretched, increasing ventricular filling has no significant effect on stroke volume.

Share

Embed

Copy and paste this code into your website or blog.

Add To

You must login to add videos to your playlists.

Comments

0 Comments total

to post comments.

No comments have been posted for this video yet.