Left main coronary artery (LMCA) despite its short length is the most challenging area for both cardiovascular surgeons and interventional cardiologists.
Significant LMCA disease is defined as a greater than 50% angiographic narrowing of the vessel.
The LMCA is responsible for supplying about 75% of the LV cardiac mass in patients with right dominant type and 100% in the case of left dominant type.
Severe LMCA disease = significantly reduced blood flow to a large portion of the myocardium which will put the patient at high risk for LV dysfunction and arrhythmias.
Diagnosis of LMCA disease: