The present invention relates to new methods for treating and/or preventing cardiac arrhythmias, heart failure, stroke and/or peripheral artery disease by administering a composition comprising triazolopyrimidine, or derivative or metabolite thereof. In particular, the present invention relates to methods for treating cardiac arrhythmias, heart failure, stroke and/or peripheral artery disease by administering CycloPentyl-TriazoloPyrimidine.