At 33, Shavini Fernando was given just two years to live—the result of a late-diagnosed hole in her heart, which caused her to develop a life-threatening condition called Eisenmenger syndrome. The Sri Lanka native, who came to the US to seek treatment at Johns Hopkins, was told by doctors that she couldn’t fly, meaning she wasn’t able to return home—or live alone. Patients such as Fernando often put their lives on hold, because routine activities like climbing stairs or even environmental factors like heat and humidity can cause their oxygen levels to plummet dangerously without notice.