Physiology of the third heart sound: novel insights from tissue Doppler imaging.

Published

Journal Article

BACKGROUND: The third heart sound (S(3)) is thought to be caused by the abrupt deceleration of left ventricular (LV) inflow during early diastole, increased LV filling pressures, and decreased LV compliance. We sought to determine whether the ratio of early mitral inflow velocity to diastolic velocity of the mitral annulus (E/E') could confirm the proposed mechanism of the S(3). METHODS: A total of 90 subjects underwent phonocardiography, echocardiography, tissue Doppler imaging, and left-sided heart catheterization. RESULTS: Phonocardiography detected an S(3) in 21 patients (23%). Subjects with an S(3) had lower ejection fraction (P = .0006) and increased E deceleration rate (P < .0001), E/E' (P < .0001) and filling pressures (P < .0001). The phonocardiographic S(3) confidence score correlated with E/E' (r = 0.46; P < .0001) and E deceleration rate (r = 0.43, P = .0001). Of the echocardiographic variables, only E/E' was independently associated with the S(3) confidence score (P = .009), independently of invasively determined LV filling pressures (P = .001). CONCLUSIONS: The most important determinants of the pathologic S(3) are an increased deceleration rate of early mitral inflow, elevated LV filling pressures, and abnormal compliance of the myocardium as measured by tissue Doppler imaging.

Full Text

Duke Authors

Cited Authors

  • Shah, SJ; Marcus, GM; Gerber, IL; McKeown, BH; Vessey, JC; Jordan, MV; Huddleston, M; Foster, E; Chatterjee, K; Michaels, AD

Published Date

  • April 2008

Published In

Volume / Issue

  • 21 / 4

Start / End Page

  • 394 - 400

PubMed ID

  • 17658724

Pubmed Central ID

  • 17658724

Electronic International Standard Serial Number (EISSN)

  • 1097-6795

Digital Object Identifier (DOI)

  • 10.1016/j.echo.2007.06.007

Language

  • eng

Conference Location

  • United States