# LV Contractility (dP/dt)

#### Reference Values

 LV Contractility (dP/dt) (mmHg/s) Normal >1200 Borderline 800 – 1200 Reduced <800 Severely reduced <500

#### Formula

$dP/dt = \frac{32}{Time}$

#### Definition

 dP/dt The rate of rise of LV pressure

#### Reference

 1 Bargiggia GS, et al. A. new method for estimating left ventricular dP/dt by continuous wave Doppler echocardiography: Validation studies at cardiac catheterization. Circulation 1989; 80: 1287-1292. Abstract

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Developer & Illustrator: Sirikarn Napan, MD, FACC