The internal mammary artery (IMA) grafts have been associated with long-term patency and improved survival as compared to saphenous vein grafts (SVGs). Early failure of IMA is attributed to poor surgical technique and less with thrombosis.
How is the internal mammary artery harvested?
The internal mammary artery (IMA) has consolidated itself as the preferable graft for coronary artery bypass surgery (CABG). Classically harvested through a sternotomy it is one of the initial but essential steps in CABG surgery.
What is CABG with IMA?
The internal mammary artery (IMA) is commonly used arterial graft for coronary artery bypass surgery (CABG). The IMA has a better patency and survival.
What type of graft is the internal mammary artery graft?
As the most commonly used bypass grafts, the internal thoracic (mammary) artery (ITA) grafts show the best long-term results. In most cases, the artery is left intact at its origin, with the opposite end sewn to the coronary artery below the site of the blockage.
What is IMA cardiac surgery?
The IMA conduit is widely used as a means of bypassing the left anterior descending (LAD) coronary artery during CABG procedures. Earlier research has shown the IMA-to-LAD graft to be more durable than other arterial and vein grafts, and improved patient outcomes may owe something to the procedure’s reliability.
What is Lima harvesting?
The first is the pedicled LIMA harvesting. In this technique, LIMA is excised together with the surrounding tissues. The LIMA that comprises intrathoracic fascia, veins around the artery, adipose tissue and sometimes muscular tissue is called a pedicled LIMA.
When is a heart bypass machine used?
In most cases, the machine is used to perform serious procedures that require the heart to be stopped. Patients are on the pump only as long as it takes to stop the heart from beating, complete open-heart surgery or a procedure on the lungs, and restart the heart.
How long does bypass graft last?
How long do bypass grafts last? People tend to do very well after heart bypass and most get a good 15 years before needing another intervention, which at that point would almost always be having a stent inserted.
What is skeletonized left internal mammary artery (LIMA) harvesting?
This video shows the basic technique of skeletonized left internal mammary artery (LIMA) harvesting. Skeletonization is an advanced technique of graft harvesting for coronary artery bypass grafting (CABG), and while it requires meticulous attention, it has many advantages.
How do you separate IMA and IMA from vein?
The cautery tip gently separates the vein and IMA. The trunk of the IMA is separated from the chest wall gradually. This allows exposure of the perforating branches to cut. The authors do not have the harmonic scalpel for LIMA harvesting yet, so electrocautery is used to cut down the collaterals.
How do you identify the internal mammary artery?
With the left chest wall elevated and the parietal pleura and pericardium dissected free, the course of the internal mammary artery and vein can be identified clearly. A parallel cut is made in the inner chest wall fascia about 5 mm medial to the visualized mammary vein.
How do you dissection an ima artery?
Isolate the medial aspect of IMA then progress over the superficial surface toward its lateral side securing its branches with metal clips just over the IMA. Dissection is carried out along the entire course of the artery. The artery is harvested as a pedicle including the fascia, muscle, connective tissue, and both veins
