[SCD-FORUM] 155E Seven year old boy with suspected LQT3 Dr. Schwartz

[SCD Symposium]

I comment on Dr. Makarov's statement. I am not sure what is his basis to
say that Na+ channel blockers (it should be mexiletine!) do not shorten
QTc. They are indeed ineffective in LQT1 and LQT2 and  should be used only
in LQT3 patients. In this group, with very few exceptions, they produce a
major shortening of QTc. A statement on this issue requires that only LQT3
patiens are analyzed. On how many LQT3 patients is  Dr. Markov's experience
based? Thanks for a prompt reply.
Peter J. Schwartz