Template:ACLS Narrow Irregular Tachycardia

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Narrow Irregular Tachycardia

  • Multi-focal atrial tachycardia (MAT)
    • Treat underlying cause (hypokalemia, hypomagnesemia)
    • Consider diltiazem
    • Avoid beta blockers unless they are already known to be tolerated, as airway disease often co-morbid
    • If not symptomatic and rate < 110/120 bpm, may not require treatment (e.g., patient with MAT secondary to COPD)
  • Sinus Tachycardia with frequent PACs
    • Treat underlying cause
  • A fib / A Flutter with variable conduction (see also Atrial Fibrillation with RVR)
    • Check if patient has taken usual rate-control meds
      • If missed dose, may provide dose of home medication and observe for resolution
    • Determine whether patient is better candidate for rate control or rhythm control [1]
      • Rate control preferred with:
        • Persistent A fib
        • Less symptomatic patients
        • Age 65 or older
        • Hypertension
        • No heart failure
        • Previous failure to cardiovert
        • Patient preference
      • Rhythm control preferred with:
        • Paroxismal or new A fib
        • More symptomatic patients
        • Age < 65 years
        • Heart failure clearly exacerbated by A fib
        • No history of rhythm control failure
        • Patient preference
    • Rate control with:
    • Rhythm conversion with:
  1. Frankel, G. et al. (2013) Rate versus rhythm control in atrial fibrillation. Canadian Family Physician 59(2), 161 - 168