USMLE Forums

USMLE Forums (
-   USMLE Step 1 Forum (
-   -   What is dp/dt ? (

memory 12-25-2009 11:13 AM

What is dp/dt ?
"in strenuous running there is an increase in ejection fraction and dp/dt because of increased contractility of the heart"
qn: kaplan q bank-peripheral circulation. q. no. 4 from "EXERCISE"
please tell me what is dp/dt.

GNND85 12-25-2009 11:43 AM

dp/dt means the change of pressure as a function of change in tension. which means the pressure development during isovolumetric contraction.
It's one of the ways we measure the contractility of the heart.
It follows Frank Starling Law, which states that as you increase the tension you'll increase the performance. But at a given tension it's the contractility of the heart that can increases the pressure development.
dp/dt and ejection fraction are measures of contractility not preload not afterload.
Look at Kaplan book in the heart muscle mechanics after three or four pages from the start of the chapter and you will learn more about it.

raheel_memon 12-27-2009 02:55 AM

nice sharing....

All times are GMT -8. The time now is 12:00 AM.

Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.

USMLE® & other trade marks belong to their respective owners, read full disclaimer
USMLE Forums created under Creative Commons 3.0 License. (2009-2019)