The GuardianSix to eight hours of sleep best for the heart, says studyThe GuardianResearch shows sleep deprivation or excessive hours in bed increase risk of coronary artery disease or stroke. Press Association. Sun 26 Aug 2018 09.20 EDT Last modified on Sun 26 Aug 2018 09.28 EDT. Share on Facebook · Share on Twitter · Share via ...Sleep 'sweet spot' for optimum heart healthDaily EchoFinding the sweet spot of a good night's sleep: not too long and not too shortEuropean Society of Cardiology (press release)all 5 news articles