y e s t r d a the concept of what is now called trans myocardial revascularization actually precedes evo lution coronary artery bypass cabg surgery and percutaneous transluminal angioplasty ptca wearn 1 described microanato my most notably arterioluminal sinusoids which are poorly developed in humans but major blood supply to reptiles as early 1933 soon after publication by researchers embarked upon fascinating not always successful journey resupply arterial flow ischemic myocardium 1935 beck published his animal experiments on grafting vascularized tissue such parietal peri cardium surface heart 2 well effect mechanical non abrasion epi cardial surfaces 3 part procedure 1954 vineberg an improvement 4 technically difficult success limited proce dure attempted achieve indirect however implanted internal mammary into wall whereas used flaps continued refine gradual adoption technique for fol lowed
