Echocardiographic Doppler evaluation of left ventricular diastolic function. Physics and physiology.

Abstract

ABLE 1.Table of Abbreviations General acceleration term, cm/sec2 Effective mitral valve area, cm2 General compliance term, cm3/(dyne/cm2)=cm4-sec2/g (in common units: 1 cm3/mm Hg=0.00075 cm3/[dyne/cm2]) A Instantaneous atrial compliance, cm3/(dyne/cm2) or cm3/mm Hg v Instantaneous ventricular compliance, cm3/(dyne/cm2) or cm3/mm Hg n Instantaneous net atrioventricular compliance, CACV/(CA+CV), cm3/(dyne/cm2) or cm3/mm Hg SV Left ventricular end-systolic volume, cm3 General force term, dyne (g-cm/sec2) JRT Isovolumic relaxation time, the interval between aortic valve closure and mitral valve opening, msec Effective acceleration length of blood passing through the mitral valve (cm); pL is mitral inertance 1 General mass term, g General pressure term, dyne/cm2=g/cm-sec2 (in common units: 1 mm Hg= 1,333 dyne/cm2) p Atrioventricular pressure difference, dyne/cm2 or mm Hg Iko Atrial pressure at mitral valve opening, dyne/cm2 or mm Hg Ventricular pressure, dyne/cm2 or mm Hg General stiffness term, (dyne/cm2)/cm3=g/(cm4-sec2) (in common units: 1 mm Hg/cm3= 1,333 [dyne/cm2]/cm3) k , Instantaneous atrial stiffness, (dyne/cm2)/cm3 or mm Hg/cm3 Instantaneous ventricular stiffness, (dyne/cm2)/cm3 or mm Hg/cm3 Instantaneous net atrioventricular stiffness, SA+SV, (dyne/cm2)/cm3 or mm Hg/cm3 General velocity term, cm/sec w k Chamber volume constant, the volume of blood required to increase pressure in the atrium or fully relaxed ventricle by a factor of e, 2.71828, cm3 Vlk Ventricular volume constant, cm3 TI Velocity time integral of the E wave, cm Blood density, 1.05 g/cm3 Isovolumic relaxation time constant, msec