AICA-Ribonucleotide (AICAR) AICAR (5-amino-1-β-D-ribofuranosyl-imidazole-4-carboxamide), also known as ZMP, is an analog of AMP that is capable of stimulating AMP-dependent protein kinase activity (AMPK). AICAR is being researched to treat and protect against cardiac ischemic injury. If left untreated, it may lead to a myocardial infarct. Cardiac Ischemia is caused by insufficient blood flow and oxygen to the myocardium. AICAR was first used in the 1980s as a method to preserve blood flow to the heart during surgery.