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It is generally easy to define the efficacy of a new the- peutic agent. However, what is even more difficult and more challenging yet more important is to define its safety when administered to millions of patients with multi-faceted d- eases, co-morbidities, sensitivities and concomitant medi- tions. The commonest cause of new drug discontinuations, cause for disapproval from marketing and removal from the market after approval is a drug s effect on cardiac repolari- tion which is essentially identified by increasing the duration of the QTc interval duration on the standard 12-lead elect-...

It is generally easy to define the efficacy of a new the- peutic agent. However, what is even more difficult and more challenging yet more important is to define its safety when administered to millions of patients with multi-faceted d- eases, co-morbidities, sensitivities and concomitant medi- tions. The commonest cause of new drug discontinuations, cause for disapproval from marketing and removal from the market after approval is a drug's effect on cardiac repolari- tion which is essentially identified by increasing the duration of the QTc interval duration on the standard 12-lead elect-...