Healthy Volunteers Clinical Trial
Official title:
The Multi-center Normal Reference Study of Tissue Motion Tracking of Mitral Annular Displacement(TMAD) in Chinese Han Adults Study
To establish the range of TMADmid、TMADmidpt% by using tissue motion tracking of mitral annular displacement (TMAD), and to explore the influencing factors.
With the gradual aging of Chinese population and continuous development of economy and
society, the incidence of cardiovascular disease and the number of patients have increased
rapidly. The National Heart Center has reported that the number of patients with clinically
diagnosed cardiovascular disease in China has reached 290 million in 2016 (240 million in
2014). Cardiovascular disease is the most common cause of death in humans. Left ventricular
systolic function plays an important role in the treatment and prognosis of patients with
myocardial diseases. Early sensitive detection of left ventricular systolic function, timely
treatment and early evaluation of the therapeutic effect can greatly reduce the death of
patients with myocardial diseases rate.
At present, the left ventricular ejection fraction (LVEF), measured by the two-plane Simpson
method in clinical, is one of the methods to evaluating left ventricular systolic function.
It is especially suitable for patients with geometric deformation of the left ventricle, but
some early heart failure patients' LVEF is still in the normal range, whose systolic function
has been reduced, but. In recent years, 2D longitudinal strain is one of the indicators for
evaluating left ventricular systolic function. The researchers believe that 70% of cardiac
function is obtained by longitudinal movement of myocardium , which can be used as a good
indicator for identifying myocardial diseases. However, both the two-plane Simpson method and
the 2D longitudinal strain require good sound transmission conditions and good image quality.
You can clearly see the endocardium and epicardium. Not all of patients in the clinic can get
better image.
Basic and clinical studies and clinical statistics show that tissue motion tracking of mitral
annular displacement (TMAD) is not affected by image quality and can effectively evaluate
left ventricular systolic function. It can measure the mitral valve annulus displacement by
marking the mitral valve annulus point and the reference point, which can quickly and
accurately evaluate the left ventricular longitudinal contraction function.
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