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The first left ventricular assist device (LVAD) system was created by Domingo Liotta at Baylor College of Medicine in Houston in 1962. The first LVAD was implanted in 1963 by Liotta and E. Stanley Crawford. The first successful implantation of an LVAD was completed in 1966 by Liotta along with Dr. Michael E. DeBakey.
One parameter to quantify this difference is the pulsatility index (PI), which is equal to the difference between the peak systolic velocity and the minimum diastolic velocity divided by the mean velocity during the cardiac cycle. This value decreases with distance from the heart.
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Thoratec's third-generation HeartMate LVAD is the HeartMate 3, [48] [49] designed to lower adverse event rates through improved hemocompatibility, and to increase ease of surgical placement through new design and compact size. [50] [51] It began undergoing clinical trials in the U.S. and internationally in mid 2014. [48] [49] [50] [52] [53]
The arterial resistivity index (also called as Resistance index, abbreviated as RI), developed by Léandre Pourcelot , is a measure of pulsatile blood flow that reflects the resistance to blood flow caused by microvascular bed distal to the site of measurement.
The chips will range in price from $549 to $1,999, with top models arriving on Jan. 30 and lower-tier models coming in February. Ben Bajarin, chief executive of technology consultancy Creative ...
Devaughn Vele gets a good grade for concentration. The Denver Broncos receiver couldn't have figured that he would catch a touchdown when Bo Nix threw it toward the back of the end zone.
Cerebroplacental ratio is a tool used in obstetric ultrasound to predict adverse pregnancy outcome. [1] It is measured by dividing the pulsatility index of the middle cerebral artery of the foetus by the pulsatility index of the umbilical artery of the foetus.