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The terms tissue Doppler imaging (TDI) and tissue velocity imaging (TVI) are usually synonymous with TDE because echocardiography is the main use of tissue Doppler. Like Doppler flow, tissue Doppler can be acquired both by spectral analysis ( spectral density estimation ) as pulsed Doppler [ 1 ] and by the autocorrelation technique as colour ...
A transthoracic echocardiogram (TTE) is the most common type of echocardiogram, which is a still or moving image of the internal parts of the heart using ultrasound.In this case, the probe (or ultrasonic transducer) is placed on the chest or abdomen of the subject to get various views of the heart.
In some studies, the 1 year mortality rate of severe, medically treated TR is 36-42% with a 2-3.2 times increased risk of death in moderate or severe TR as compared to mild TR or no tricuspid valvular disease. [3] Even in those with mild TR, a large population based study showed about a 29% greater risk of death as compared to healthy controls ...
[15] [16] [17] Tissue Doppler technology, the alternative method for strain rate imaging to speckle tracking technology, requires achieving sufficient parallel orientation between the direction of motion and the ultrasound beam. Its use has remained limited due to angle dependency, substantial intraobserver and interobserver variability and ...
[2] [47] And additionally to FLNA. [23] To date, only one of the genes that have been associated with MVP is a direct regulator of connective tissue maintenance and extracellular matrix composition: TLL1, in a gain-of-function mechanism. Other genes that have been associated with MVP include: 13.q31.3-q32.1 [2] [48] 16p12.1-p11.2 [2] [49] [50]
Mitral annular calcification (MAC) is a multifactorial chronic degenerative process in which calcium with lipid is deposited in the annular fibrosa ring of the heart's mitral valve. MAC was first discovered and described in 1908 by M. Bonninger in the journal Deutsche Medizinische Wochenschrift . [ 1 ]
Strain means Deformation, and is defined as relative change in length.The Lagrangian formula ε L = (L-L 0)/L 0 = ΔL/L 0, where L 0 is baseline length and L is the resulting length, defines strain in relation to the original length as a dimensionless measure, where shortening will be negative, and lengthening will be positive.
The term "schlieren imaging" is commonly used as a synonym for schlieren photography, though this article particularly treats visualization of the pressure field produced by ultrasonic transducers, generally in water or tissue-mimicking media. The method provides a two-dimensional (2D) projection image of the acoustic beam in real-time ("live ...