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SINUS NODE DYSFUNCTION
Arief Bowo Kurniawan
DISKUSI
SA node terletak di lateral sulcus terminalis,
panjang 10-20 mm, lebar 2-3 mm
Rate lebih tinggi  impuls dari bagian
suprrior node, rate lebih rendah  bagian
inferior
Velocity conduction SA node : 2-5 cm/sec
Fungsi nodus SA ditentukan oleh low
maximum diastolic MP dan Fase 4 depol
GAMBARAN UMUM
SA node divaskularisasi oleh sinus nodal
branch artery cabang RCA pada 50-60%,
dan bisa juga dari LCx
SA node diinervasi oleh postganglionic
adrenergik dan kolinergik nrve terminal
Vagal effect terhadap sinus node dan AV
node tidak berjalan bersamaan
GAMBARAN UMUM
GAMBARAN UMUM
5
6
 SND atau SSS adalah gangguan yang melibatkan
pembentukan impuls SA node dan konduksi impuls
interatrial
Insidensi 150-200 per 1 juta orang populasi
SND disebabkan oleh gangguan dari automatisitas SA
node dan gangguan konduksi interatrial, disebabkan oleh
faktor intrinsik dan ekstrinsik
 INTRINSIK FACTOR:
penyakit sistem konduksi primer, CAD, kardiomiopati,
gagal jantung
EKSTRINSIK FACTOR:
imbalance otonomik (sinkope neurogenik,
hipersensitivitas sinus karotis,neuropati otonomik), post
operasi jantung, imbalance elektrolit, terapi obat
(antiaritmia,klonidin,litium)
7
8
Sinus Bradycardia
•Sinus bradycardia didefinisikan HR < 60 kpm, dengan SA node sebagai
pacemaker primer. is defined by a heart rate below 60 bpm with the sinus
node being the primary pacemaker. In the majority of cases sinus
bradycardia is rather a physiologic reaction than a pathologic condition.
Sinus bradycardia is a common, often transient finding and is
predominantly caused increased vagal tone.
•It is therefore seen in trained athletes and in healthy young adults at rest
and at night (heart rate may fall below 30 bpm at night).
•In patients with persistent sinus bradycardia, especially with documented
heart rates slower than 40 bpm during daytime and symptoms of
bradycardia, sinus bradycardia is pathologic and often a manifestation of
SND.

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SND.pptx

  • 1. SINUS NODE DYSFUNCTION Arief Bowo Kurniawan DISKUSI
  • 2. SA node terletak di lateral sulcus terminalis, panjang 10-20 mm, lebar 2-3 mm Rate lebih tinggi  impuls dari bagian suprrior node, rate lebih rendah  bagian inferior Velocity conduction SA node : 2-5 cm/sec Fungsi nodus SA ditentukan oleh low maximum diastolic MP dan Fase 4 depol GAMBARAN UMUM
  • 3. SA node divaskularisasi oleh sinus nodal branch artery cabang RCA pada 50-60%, dan bisa juga dari LCx SA node diinervasi oleh postganglionic adrenergik dan kolinergik nrve terminal Vagal effect terhadap sinus node dan AV node tidak berjalan bersamaan GAMBARAN UMUM
  • 5. 5
  • 6. 6  SND atau SSS adalah gangguan yang melibatkan pembentukan impuls SA node dan konduksi impuls interatrial Insidensi 150-200 per 1 juta orang populasi SND disebabkan oleh gangguan dari automatisitas SA node dan gangguan konduksi interatrial, disebabkan oleh faktor intrinsik dan ekstrinsik  INTRINSIK FACTOR: penyakit sistem konduksi primer, CAD, kardiomiopati, gagal jantung EKSTRINSIK FACTOR: imbalance otonomik (sinkope neurogenik, hipersensitivitas sinus karotis,neuropati otonomik), post operasi jantung, imbalance elektrolit, terapi obat (antiaritmia,klonidin,litium)
  • 7. 7
  • 8. 8
  • 9.
  • 10. Sinus Bradycardia •Sinus bradycardia didefinisikan HR < 60 kpm, dengan SA node sebagai pacemaker primer. is defined by a heart rate below 60 bpm with the sinus node being the primary pacemaker. In the majority of cases sinus bradycardia is rather a physiologic reaction than a pathologic condition. Sinus bradycardia is a common, often transient finding and is predominantly caused increased vagal tone. •It is therefore seen in trained athletes and in healthy young adults at rest and at night (heart rate may fall below 30 bpm at night). •In patients with persistent sinus bradycardia, especially with documented heart rates slower than 40 bpm during daytime and symptoms of bradycardia, sinus bradycardia is pathologic and often a manifestation of SND.