A drug used to treat erectile dysfunction (inability to get and keep an erection firm to have sexual intercourse) can slow down or even reverse the progression of heart failure claim researchers. According to the study published in the Journal of Scientific Reports most current treatments are ineffective. However the current study conducted on a sheep is claimed to be a breakthrough in the treatment of heart disease.The lead author professor Andrew Trafford argues the effect is likely to be shown in humans as well. Heart failure is a devastating condition occurring when the heart is too weak to pump