The purpose of this research study is to collect follow-up data for patients who underwent TMR with the CryoLife CardioGenesis Holmium:YAG Laser System to further define the disease characteristics of the treated patient population and evaluate the risk factors for the occurrence of adverse events at 30 days and approximately 1-year (12- 18 months) after the TMR procedure.

The follow-up will consist of answering questions for your study doctor 30 days and approximately 1 year (12-18 months) after the TMR procedure so that he or she can determine if you have had any complications. No investigational procedures or devices will be used in this research study.