question: my husban is 61 yrs of age and he has only have a heart from 2 heart attacks,and hardening of the arteries,he been having episodes of shortness of breath,almost passing out,and rapid heartbeat and now blurred vision,to no avail he's had a stress induced test/w/no results of a blackage and hes going to a pulmunary dr.,now and they're gonna do a breathing test on him,they also put him on sprivia which didn't do any good,what is it?