Abstract: A nanocomposition for use in treating a cardiac condition using phthalocyanine dye, such as IR700. A nanocomposition having IR700, an 8PEG nanoparticle and a cardiac targeting peptide. Administering a product comprising IR700 to a patient, whereby the IR700 is delivered to cardiac tissue, and found in only cardiac tissue; and administering light to activate the IR700, thereby producing an ROS.