I had this problem, but the vasospasm was caused by a cath procedure. The Cardiologist put me onto calcium channel blockers which stopped the spasms and after a few weeks he took me off the medication. I've been fine since then. They had to do this because I can't tolerate nitrates.
I also had this problem the doc. put me on a calcium channel blocker and fast acting nitro. I also have 3 valves that regurgitate, mild dilatition of the right ventricular the right atrium LVEDP mildly increased RVSP mildly increased at rest and increased when exercising. The calcium channel blocker makes my blood pressure on the low side and heart rate low around 4l. I just started the meds. a couple of days ago. I have a long way to go with all of these problems. Hang in.