Tissue Doppler echocardiography Tissue Doppler echocardiography Tissue Doppler echocardiography (TDE) is a medical ultrasound technology, specifically a form of echocardiography that measures the velocity of the heart muscle (myocardium) through the phases of one or more heartbeats by the Doppler effect (frequency shift) of the reflected ultrasound. The technique is the same as for flow Doppler echocardiography measuring flow velocities. Tissue signals, however, have higher amplitude and lower velocities, and the signals are extracted by using different filter and gain settings. The terms tissue Doppler imaging (TDI) and tissue velocity imaging (TVI) are usually synonymous with TDE because echocardiography is the main use
Human Tissue Authority professional members of the board come from medical and scientific backgrounds, and the lay members bring a wide range of business, commercial and public sector experience. The members of the authority are as follows: Human Tissue Authority The Human Tissue Authority (HTA) is an executive non-departmental public body of the Department of Health of the United Kingdom. It regulates the removal, storage, use and disposal of human bodies, organs and tissue for a number of scheduled purposes such as research, transplantation, and education and training. It was created by the Human Tissue Act 2004 and came into being on 1