- Long-term nicorandil therapy improves cardiac sympathetic nerve activity after reperfusion therapy in patients with first acute myocardial infarction. Kasama, S., Toyama, T., Sumino, H., Kumakura, H., Takayama, Y., Ichikawa, S., Suzuki, T., Kurabayashi, M. J. Nucl. Med. (2007)