Fetal cardiac function assessed by Doppler myocardial performance index (Tei Index)
نویسندگان
چکیده
منابع مشابه
MRI assessment of myocardial global function by tei index - a comparison to echocardiographic tei index
Introduction The Tei index is an echocardiographic measure of global ventricular function, calculated as ((isovolumic contraction time) + (isovolumic relaxation time)) / (ejection time). This may be calculated as ((time of atrioventricular valve closure) (time of arterial valve closure)) / (time of arterial valve closure). Used as a measure of systolic as well as diastolic function, the Tei ind...
متن کاملDoppler-Derived Myocardial Performance Index in Healthy Children in Shiraz
Background: Assessment of myocardial function is essential in heart disease, but in regard to systolic and diastolic functions such evaluation has limitation. Ejection fraction is difficult to assess in abnormally-shaped ventricles, and diastolic inflow velocity pattern may be fused because of tachycardia. Objective: A myocardial performance index (MPI) or Tei index has been developed for adult...
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impairment of left ventricular (LV) systolic and diastolic dysfunction to various degrees. These functions are energetically and tightly coupled: 1) at the cellular level, since adenosine triphosphate is a substance essential for both active contraction and relaxation; 2) at the myocardial level, because regional wall motion asynchrony influences global LV diastolic function (contraction-relaxa...
متن کاملThe Tei index of myocardial performance: applications in cardiology.
of classical echocardiographic indexes for the estimation of systolic and diastolic left ventricular (LV) function. The ejection fraction (EF, an index of systolic function) and LV volumes are subject to large errors when the ellipsoid shape of the heart becomes spherical. Age, rhythm and conduction disturbances, and changes in loading all affect the Doppler signal of transmitral flow, which is...
متن کاملEvaluation of conventional Doppler fetal cardiac function parameters: E/A ratios, outflow tracts, and myocardial performance index.
Structural evaluation of the fetal heart is well established. Functional evaluation using pulsed-wave Doppler may also be performed. E/A ratios express the relationship between the maximal velocities of the E and A waveforms of ventricular filling. In normal fetuses, E/A ratios are usually <1 but show a constant increment during gestation, mainly related to the increment of the E wave. In intra...
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ژورنال
عنوان ژورنال: Ultrasound in Obstetrics and Gynecology
سال: 2003
ISSN: 0960-7692
DOI: 10.1002/uog.11