(TMR) is a surgical procedure which uses a low power laser to create small passageways or channels through the heart muscle. The potential benefits of the procedure are the reduction or elimination of angina (chest pain), increased exercise tolerance, and improved quality of life. It is believed that these channels may allow oxygen rich blood to flow from the inside of the heart to regions of the heart muscle that do not have normal blood flow. The precise mechanism though is not yet clearly understood.
TMR surgery is performed under general anesthesia. After an incision is made in the chest, the TMR System is used to create 15-30 channels from the outside of your heart to the inside of your heart. The channels are made in the part of the heart that is not will supplied with blood. The TMR procedure itself takes 2-3 hours and the postoperative care is the same as for any cardiac surgery. Patients can expect to stay in the hospital for 4-6 days after the surgery (Web, 1).
TMR involves creating channels in the heart with a laser to relieve angina. During the procedure, the chest is opened by either a thoracotomy (incision through the chest wall) or a sternotomy (incision through the breastbone). Laser energy is then used to create about 15-30 tiny holes, or channels, in oxygen-starved regions of the heart muscle.
At this stage, TMR using the Heart Laser System is a treatment for patients for whom angioplasty and bypass are no longer alternatives. The procedure differs from both in a variety of ways. It appears to avoid the restenosis problems (re-narrowing of arteries) of angioplasty and bypass surgery, since it is believed to create new blood pathways with the heart muscle.
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