>Isn't this a big unmet need, where everything else failed due to placebo issues?<
No—you must be thinking of some other medical condition. Tracleer and Viagra (Rovatio) are approved for PAH, and ENCY's drug candidate is also in the running.
You know I was about to congratulate you again, when I realized that I was confusing MYOG with MYGN ! (both were identical-looking $20-stocks this morning.....)