Myocardial velocity gradient as a new indicator of regional left ventricular contraction: Detection by a two-dimensional tissue doppler imaging technique

Uematsu, Masaaki; Miyatake, Kunio; Tanaka, Norio; Matsuda, Hisao; Sano, Akihiro; Yamazaki, Nobuo; Hirama, Makoto; Yamagishi, Masakazu

doi:10.1016/0735-1097(95)00158-v

Cited by 314 publications

(140 citation statements)

References 19 publications

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“…Longitudinal and radial strain in normal subjects (group I) are much lower than that reported in the literature. 23,24 In fact, in this study, longitudinal and radial strain in group I (normal controls) are half of what is reported in normal subjects in the other studies 23,24 and so is the radial strain rate. These cast serious doubts on the validity of data and also on the methodology.…”

Section: Figuresupporting

confidence: 44%

Subclinical left ventricular systolic dysfunction in chronic mitral regurgitation and its potential impact on management: quo vadis?

Mohan¹,

Mohan

2012

Indian Heart Journal

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Section: Figuresupporting

confidence: 44%

Subclinical left ventricular systolic dysfunction in chronic mitral regurgitation and its potential impact on management: quo vadis?

Mohan¹,

Mohan

2012

Indian Heart Journal

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“…The conventional method for calculating myocardial velocity gradients using color-coded TDI is based on the hypothesis that the contraction or relaxation velocity of the LV wall changes in a linear fashion from the endocardium to the epicardium [14,18]. In addition, there are limitations in the reproducibility related to the short sampling time during one cardiac cycle.…”

Section: Future Directionsmentioning

confidence: 99%

“…A recent study [18] has described a method in which the distribution of myocardial velocities between the endocardium of the right ventricular side and the endocardium of the LV side of the ventricular septum or that between the endocardium and epicardium of the LV posterior wall can be visualized, and the slope in linear regression of those velocities represents the myocardial velocity gradient (Figure 2).…”

Section: Principlementioning

confidence: 99%

The Role of Tissue Doppler Imaging as a New Diagnostic Option in Evaluating Left Ventricular Function

Oki

2003

J Echocardiogr

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In general, pump function and myocardial contractility should be assessed when evaluating left ventricular (LV) systolic function. Ejection fraction obtained from left ventriculography is routinely used as an index of pump function, and the maximum value of the first derivative of LV pressure curve (peak dP/dt) has been used as an index of myocardial contractility. On the other hand, active relaxation of the LV myocardium during early diastole and LV passive filling or compliance during mid-to late diastole are important factors in evaluating LV diastolic function. To obtain this information, the time constant of the LV pressure decay during isovolumic diastole (tau) and LV end-diastolic pressure, which are calculated from the LV pressure curve recorded during cardiac catheterization, is used. However, invasive hemodynamic measurements cannot be performed in all patients, nor are they appropriate for follow-up evaluation involving repeated examinations.Recently, routine echocardiography has facilitated the noninvasive evaluation of LV systolic and diastolic function. The percent fractional shortening of the LV based on M-mode echocardiography and the LV ejection fraction determined by two-dimensional echocardiography are indices of LV pump function, and therefore cannot accurately evaluate LV myocardial contractility. On the other hand, "diastology" has become an important clinical topic [1]. There are several reasons why assessment of diastolic function is important: 1) 30 to 40% of patients evaluated for congestive heart failure have normal LV pump function [2,3]; 2) the transmitral flow velocity pattern, which is recorded using the pulsed Doppler method, may be an index for noninvasive evaluation of LV diastolic function [4]; and 3) the prognosis is poor in patients with LV systolic dysfunction and pseudonormalization or restrictive pattern of the transmitral flow velocity [5,6]. However, it has been shown that the diastolic indices obtained from transmitral and pulmonary venous flow velocities are influenced by loading conditions, especially by the pre- The Role of Tissue Doppler Imaging as a New Diagnostic Option in Evaluating Left AbstractThe widespread use of the pulsed Doppler echocardiography has facilitated the noninvasive evaluation of hemodynamic abnormalities of the left atrium and left ventricle (LV) based on transmitral and pulmonary venous flow velocity patterns. However, it has been shown that loading conditions, especially preload, influence the indices obtained from these velocity patterns. Recently, tissue Doppler imaging (TDI) has been applied to the clinical setting to assess LV myocardial function. In particular, this procedure has the following characteristics: 1) it can provide circumferential and longitudinal information for the LV myocardium; 2) the early diastolic LV myocardial parameters determined by TDI are not influenced by preload; 3) LV myocardial contractility can be evaluated from the early systolic parameters; 4) LV systolic and diastolic asynchrony can be detected; 5) myoca...

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“…In addition, pulsed Doppler techniques such as TDI can result in low velocity resolution and unreliable measurements (7). Furthermore, TDI lacks spatial information and myocardial velocities are affected by the angle of insonation of the ultrasound beam from the transducer (10). The benefit of TDI is that it can provide a high temporal resolution of up to 5 msec, which allows for a detailed analysis of myocardial motion and results in characteristic findings in normal subjects (e.g., a small biphasic wave) within a short temporal window of 50 msec during isovolumetric relaxation (IVR) (11,12).…”

mentioning

confidence: 99%

Detailed analysis of myocardial motion in volunteers and patients using high‐temporal‐resolution MR tissue phase mapping

Jung

Föll

Böttler

et al. 2006

Magnetic Resonance Imaging

115

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Purpose: To detect and investigate details in left ventricular (LV) motion patterns with a temporal resolution comparable to that of echocardiography. Material and Methods:To assess global and regional myocardial motion in high temporal detail, respiratory-gated MR phase-contrast measurements with three-directional velocity encoding (venc) were performed in 12 healthy volunteers and two patients with LV hypertrophy in basal, midventricular, and apical locations of the LV with a temporal resolution of 13.8 msec. Results:The volunteer data revealed details in LV motion patterns that were known only from echocardiography. For all volunteers, characteristic myocardial motion patterns, such as triphasic global diastolic expansion, could be detected with high accuracy. One volunteer underwent an additional echocardiographic measurement in order to corroborate the complex motion features as measured by MRI. Patient examinations revealed substantial changes in diastolic function compared to motion patterns in healthy volunteers. Conclusion:The proposed high-temporal-resolution velocitymapping technique provides previously undetectable information on LV performance, and is highly promising for the detection of local and global motion abnormalities in patients with disturbed LV performance, such as diastolic dysfunction.

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Myocardial velocity gradient as a new indicator of regional left ventricular contraction: Detection by a two-dimensional tissue doppler imaging technique

Cited by 314 publications

References 19 publications

Subclinical left ventricular systolic dysfunction in chronic mitral regurgitation and its potential impact on management: quo vadis?

Subclinical left ventricular systolic dysfunction in chronic mitral regurgitation and its potential impact on management: quo vadis?

The Role of Tissue Doppler Imaging as a New Diagnostic Option in Evaluating Left Ventricular Function

Detailed analysis of myocardial motion in volunteers and patients using high‐temporal‐resolution MR tissue phase mapping

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