Disclosed herein are N-methanocarba derivatives of AMP and their use in the treatment of cardiac and vascular diseases and conditions responsive to activation of the cardiac P2X receptor. In one embodiment, the N-methanocarba derivative of AMP is the N-methanocarba derivative of 2-chloro-AMP. Diseases and conditions responsive to activation of the cardiac P2X receptor include, for example, cardiac hypertrophy, cardiac failure resulting from any cause of abnormal Ca2+ homeostasis or from myocardial injuries, vascular insufficiency leading to myocardial infarction, post-myocardial infarction conditions, post-myocardial infarction conditions within the short-term post-infarction period, and diastolic heart failure.
