It is believed coronary artery branching pattern is as unique as our finger prints.Left main coronary artery usually bifurcates .Uncommonly it may trifurcate or rarely quadrificates.
When it gives a cluster of branches like in this patient , the left ventricle is richly supplied with multiple pathways .
These are the patients who are protected well during a coronary event as any one of these branches can back up.However, if leftmain is involved one can guess the consequences !
Dr.S.Venkatesan MD 
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