The purpose of this study is to evaluate the safety of the previously conducted clinical trial cell transplant therapy using Hearticellgram-AMI for patients with acute myocardial infarction. This is a follow-up observational study and targeting the subjects who participated in the previously conducted clinical trial.

The safety evaluation in this clinical trial is performed with variables, such as occurrence and severity of adverse events, clinical laboratory tests, vital signs, physical examination, cardiac events, and cancer.

Inclusion Criteria:

• Patients who have elapsed for more than 2 years after onset of acute myocardial infarction among the patients who had received cell transplant therapy or drug treatment at least once in test and control group on the previously conducted clinical trial.
• Subjects agreed to participate in this follow-up study and signed the consent form.

Exclusion Criteria:

• N/A

Subjects agreed to participate in this follow-up observational study among the subjects (80 patients:40-test group, 40-control group) who participated in the previously conducted clinical trial.