For the Apollo 13 crew in 1970 ... as well as the visiting shuttle Discovery astronauts, the stuck valve between a newly-installed ammonia tank and a nitrogen tank responsible for feeding coolant ...

Hyderabad: A team of Cardiologist at Apollo Hospitals ... double MitraClip procedure for this patient with severe mitral valve regurgitation or blood leaking backwards through the mitral valve ...

Doctors at the Apollo Hospitals have performed procedures to address critical problems in the mitral valve and the aortic valve of the heart at the same time on a 75-year-old patient from Sri Lanka.