which of the following statements of flecainide is not correct

A、flecainidesuppressesphase0upstrokeinpurkinjeandmyocadialfibers;
B、flecainidereducesautomaticity;
C、flecainideisusefulintreatingrefractoryventriculararrhythmias;
D、flecainideisusefulinsuppressingprematureventricularcontraction;
E、flecainidedoesnotinducelife-threateningventriculartachyarrhythmias