醫學筆記匯整 ED Notes

 Right Ventricular Outflow Tract (RVOT) Tachycardia 

- A form of monomorphic VT, generally considered benign
  originating from the RVOT or occasionally from the tricuspid annulus.

- Usually in patients without underlying structural heart disease or ARVD
- Symptoms of palpitations, dizziness, less commonly loss of consciousness

-  Idiopathic VT 原發性 VT 是指沒有結構性心臟病而出現 VT
   Accounts for 10% of all VT
   70% of idiopathic VT will have a RVOT morphology

- Triggered by sympathetic stimulation such as anxiety and excitement
   包括運動或壓力引發的持續性 VT, 非持續性反覆發作的單形性 VT
   

- Underlying mechanism of c-AMP mediated triggered activity
- May respond to adenosine
   這類 VT 會因 catecholamines 誘發, 打 adenosine 或 vagal maneuvers, 
   使用乙型阻斷劑和鈣離子阻斷劑 終止 VT
   Avoidance of any stimulants such as caffeine

-  Heart rate > 100
    QRS duration > 120 ms
    LBBB Morphology
    Rightward / inferior axis around +90 degree
    AV dissociation

https://lifeinthefastlane.com/ecg-library/rvo/