Financial & competing interests disclosure
TC Hanff was supported by the National Heart Lung and Blood Institute at the NIH grant T32-HL007891, which did not directly finance the production of this manuscript. S Nazarian has been a consultant for Cardiosolv and Circle Software; and received grants from SIEMENS, Imricor, Biosense Webster and NIH. The authors have no other relevant affiliations or financial involvement with any organization or entity with a financial interest in or financial conflict with the subject matter or materials discussed in the manuscript apart from those disclosed.
No writing assistance was utilized in the production of this manuscript.