Computer　simulation　is　an　important　method　in　the　study　of　cardiac　electrophysiology.　However,　complicated　studies　in　tissues　are　difficult　because　of　the　long　computation　time.　In　order　to　speed　up　the　simulation,　in　this　paper　a　parallel　algorithm　based　on　OpenMP　was　studied　on　a　multi-core　computer.　The　Noble　91　mathematical　model　was　used　to　develop　a　two-dimensional　tissue.　By　initiating　a　reentrant　wave,　properties　of　the　conventional　sequential　program,　programs　of　the　data　parallelism　and　functional　parallelism　were　analyzed　and　compared.　The　results　showed　that　the　execution　time　of　the　data　parallelism　was　only　about　one-fourth　of　the　sequential　execution　time　and　its　efficiency　was　high,　however,　the　execution　time　of　the　functional　parallelism　was　approximately　ten　times　of　the　sequential　execution　time　and　its　efficiency　became　low.　Therefore,　the　method　of　the　data　parallelism　could　significantly　reduce　the　computation　time　and　was　suggested　to　be　a　good　choice　in　the　myocardial　simulation.