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Preload Independence of Isovolumic Relaxation Flow Propagation Velocity
Author(s) -
Voon WenChol,
Su HoMing,
Yen HsuehWei,
Lin TsungHsien,
Lai WenTer,
Sheu ShengHsiung
Publication year - 2006
Publication title -
echocardiography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 62
eISSN - 1540-8175
pISSN - 0742-2822
DOI - 10.1111/j.1540-8175.2006.00259.x
Subject(s) - preload , supine position , diastole , cardiology , doppler effect , medicine , relaxation (psychology) , isovolumic relaxation time , hemodynamics , flow velocity , blood flow , inflow , mechanics , doppler echocardiography , physics , blood pressure , astronomy
To evaluate whether isovolumic relaxation flow propagation velocity (IRFPV) is independent of preload alterations, 41 healthy subjects (35 ± 7 years) were included for Doppler examinations at three different positions, i.e., supine, Trendelenburg, and reverse Trendelenburg. A positional difference was detected in the peak velocity of the transmitral early diastolic flow wave (P = 0.012) and the peak velocities of both early (P = 0.004) and late (P = 0.007) diastolic mitral annular velocity waves. In contrast, there was no positional difference in the early diastolic inflow propagation velocity or IRFPV. In conclusion, IRFPV is a preload‐independent Doppler parameter.
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