Ivabradine用以治療心搏過速,且不影響心肌收縮力、心室再極化和心內傳導,其作用機制為何?
funny current(\mathrm{I}_{\mathrm{f}})blocker
\mathrm{I}_{\mathrm{f}}
L-Type calcium channel blocker
T-Type calcium channel blocker
beta blocker