i was an intern when i observed dr. c. walton carry out the first cross-circulation case. i made an illustration of that first operation at least of the defect in the little boy s heart, put it in the patient s chart. he didn t know me, seeing that illustration he invited me into his lab and that s when the pacemaker was developed. it was just a great opportunity for me. it was an amazing time and amazing procedure, but i had no idea where it would take us over the next 60 years. well, i spent my life doing cardiac surgery. and how fortunate i was to have been there on day one as an observer. we have a check of your top stories just minutes away. i ll be right back with more on