I have been plagued for decades with unstable angina.....Hospitalized a few times, in a reputable hospital with more than qualified advice from my cardiologist, bypass surgeon and ICU director, I have been on a regemin of sublingual nitro tabs, nitro drugs, and patches , in various routeens, night and day...I had a quad pypass 11 years ago , and my surgeon who does "less invasive intra-rib" bypass operations says I am not a candidate , probably because of my advanced age of 91.....Each dismissal from the hospital I was advised that I should take a nitro pill if I have pain , and no more than every one every 15 minutes, if necessary, and no more than three in a row, which would cause a dangerous drop in bloodpressure...the third one should accompany an emergency call....not a pleasant prospect....About five days ago I was sent home....That evening I had the usual early stage of an angina attack,,,,I arose from my bed and sat in an easy chair , in a semi reclining posituation, and for the first time , the pain subsided ......I have since been sleeping in a reclining position, without sublingual pills or pain....Why ? What is the mechanics behind the change of sleeping position , and is my experience unusual ?