At International St. Mary's Hospital, Transmyocardial Revascularization (TMR) is performed using advanced cardiac surgical and laser-based techniques, with treatment plans tailored to each patient's cardiovascular condition. Established in 2014, this JCI hospital in Seoul, South Korea has 808 beds and provides comprehensive cardiac care.

Transmyocardial Revascularisation (TMR) may be recommended for carefully selected patients with severe, persistent angina caused by coronary artery disease when other treatments do not provide sufficient symptom relief. During the procedure, a specialised laser creates channels through the heart muscle to improve myocardial blood flow and reduce angina symptoms. A detailed cardiac evaluation is generally performed before surgery to assess coronary disease, ventricular function, and suitability for the procedure.