How Does TMR Work?

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In the transmyocardial laser revascularization (TMR) procedure at UW Health in Madison, Wisconsin, a Heart and Vascular Care surgeon uses a laser to create small channels through the muscular wall of the lower left chamber of the heart (the left ventricle).
Studies suggest that the procedure helps improve blood flow and reduce angina in the following ways:
  • New, small blood vessels called capillaries may begin to grow in the heart muscle wall around the channels. This process is called angiogenesis.
  • The laser may also block the nerve pathways in the area of the heart being treated. This is called denervation. Denervation may help reduce the pain associated with angina.

TMR can be performed as a single procedure or in conjunction with bypass surgery. This enables surgeons to treat different areas of the heart with the most effective technique.


Candidates for TMR


TMR is best suited for patients who:

  • Have chest pain from coronary artery disease
  • Have already had multiple angioplasties or bypass operations, and no further intervention is available
  • Have extremely narrow diseased arteries
transmyocardial laser revascularization (TMR)