Conduits for coronary bypass: internal thoracic artery.

Area of Science:

• Cardiovascular Surgery
• Vascular Grafting
• Coronary Artery Bypass Grafting (CABG)

Background:

• The internal thoracic artery (ITA) was initially viewed with skepticism as a graft for coronary artery bypass surgery.
• Early concerns included technical difficulties in harvesting, graft size, spasticity, and questionable flow capacity.

Purpose of the Study:

• To present the authors' experience and views on the use of the internal thoracic artery (ITA) since 1966.
• To trace the evolution of ITA acceptance as a coronary artery bypass conduit.

Main Methods:

• Historical review of the authors' experience with ITA grafts.
• Analysis of angiographic data and survival benefits over time.
• Observation of surgeon adoption trends and graft utilization rates.

Main Results:

• Angiographic data after a decade demonstrated superior patency rates for ITA grafts compared to saphenous vein grafts.
• Reported survival benefits further supported the efficacy of ITA grafting.
• Despite evidence, widespread adoption was slow, taking decades to become a preferred conduit.

Conclusions:

• The internal thoracic artery (ITA) is a highly effective conduit for coronary artery bypass surgery, offering superior long-term patency.
• Overcoming initial surgeon skepticism required substantial evidence of improved outcomes and survival.
• Current trends show expanding use of ITA, including bilateral applications, in coronary artery bypass procedures.