honeybug6853 honeybug6853
  • 01-02-2018
  • Biology
contestada

How many bjork shiley valves have been implanted?

Respuesta :

cohvenant
cohvenant cohvenant
  • 01-02-2018
The valve was co-invented by American engineer Donald Shiley and Swedish heart surgeon Viking Björk. Beginning in 1971, it has been used to replace aortic valves and mitral valves.
Answer Link

Otras preguntas

Find the difference of the polynomials given below and classify it in terms of degree and number of terms. 3n^2(n^2+4n-5)-(2n^2-n^4+3)
public schools are free schools supported by_________?
If you swim beneath the surface in saltwater, will the pressure be greater than in freshwater at the same depth? Why or why not?
oranges cost $3.42 for 9 pounds at this rate how much would 12 pounds cost ?
Deon throws a ball into the air. The height, h, of the ball, in meters, at the time t seconds is modeled by the function h(t) = -5t + t + 4. 1. When will the b
Find the values of x and y in the diagram below. (4x-7) 86° (7y-1)⁰ (9x + 4)
Use the discriminant to describe the solutions as one real, two real, or two imaginary solutions. x^2 - 15x + 12 = 0
Need help with chemistry homework. About separation of mixturesWhen you evaporate saltwater, and there's salt left, how does they separate, even though they wer
two trains leave the station at the same time, one heading east and the other west. the eastbound trains travels at 110 miles per hour. the westbound train trav
Find the values of x and y in the diagram below. (4x-7) 86° (7y-1)⁰ (9x + 4)