SUPRAVENTRICULAR ARRHYTHMIAS


By definition, arise in atria, AV node, or AV junction

Causes of supraventricular irritability

  1. Adrenergic stimulation or high sympathetic tone
  2. Exogenous catecholaminergic substances: caffeine, amphetamines, cocaine, etc.
  3. Digoxin
  4. Occasionally, EtOH
  5. Hyperthyroidism
  6. Hypoxia

APC's and JPC's

Atrial Fibrillation

Atrial Flutter

Junctional Tachycardia

MAT

PAT with Block

Paroxysmal Supraventricular Tarchycardia (SVT)