I have recently had OHS for mitral and trescupid valve repairs. I had my op at Wythenshawe university teaching hospital on 2nd Sept 2016. Today is the 30th Sept, I have tried sleeping on my back in bed, with 5 pillows, but to no avail, 2 hours sleep then so uncomfortable. Bed sores in the starting stalls, so decided to try the following procedure,,,,, put a nice feather pillow on the BACK of my leather couch. A poof to rest my legs on (so I could lift them up and down for circulation when needed), covered myself up with lightweight quilt. Hey presto,,,( A really decent nights sleep) no kidding ...YOU GOTTA TRY THIS !!!. REMEMBER, a feather style pillow behind your head for head and cheek support. No need to lie down, the half sloped position is extremely comfortable, you will only have to readjust few times in the night. You can angle leftish and rightish without putting strain on your sternum. Give it a go,,,,,you have nothing to loose,,,but a good nights sleep to gain. Replies appreciated.