bài giảng NGOAI TÂM THU

  ThS. Lê Hoài Nam Đại học Y Dược TP.HCM Mechanism of arrhythmogenesis •  •   •  ! Automaticity: Alterations in impulse initiation Abnormal Automaticity "!! "!!  #! !!! !$! ! !% !  ! && '& !!  !% () ()   &   !&   Afterdepolarizations and Triggered activity Afterdepolarizations and Triggered activity EAD (Early AD) • *!!"+, • "!!- '& !& .&!!&&!!   !& !!&   ! • ()-!!! DAD (Delayed AD) • *!"+, • "!!- !&/&0 • ()-  !&! . → → → Reentrant Mechanism Reentrant arrhythmias  "$ .!  !   !  #$'!  #!.   !.$ !   !!$ !- -12 Classication of arrhythmias 3  • 3  ! •    ! • "'! 3 • ( • 4 • 5 3! • *!!! • *!!! Disorders of impulse formation (!  ! • (! • (!  • (!     ! • #.! • 6 • ) • #(5 4  ! 5  ! • 5! • 5  • 5)