EKG

Atrial Flutter

search

Atrial Flutter

  • Types
  1. Type I Atrial Flutter (typical)
    1. Constant atrial rate of 240 to 350 beats per minute
    2. Ventricular rate will usually be at least a 2:1 block (AV node prevents rates above 180)
    3. Natural rate is altered by age, atrial dilation and Antiarrhythmics (esp Type Ia or Type Ic)
  2. Type II
    1. Constant atrial rate at 340 to 440 beats per minute (Faster Atrial Flutter rate than with Type I)
    2. Differs from Type I in reentry accessory path
  • Signs
  1. Constant atrial rate
    1. Atrial to ventricular rate 2 to 1: Rate of 240 to 350 beats per minute (typical)
    2. Atrial to ventricular rates may range from 1:1 to 4:1
  • Diagnostics
  • EKG
  1. Constant atrial rate
    1. Atrial rate: 300 per minute (typical)
    2. Atrial to ventricular rate
      1. Ratio 1:1 - 300 bpm (Rare, but potentially lethal)
      2. Ratio 2:1 - 150 bpm (most common)
      3. Ratio 4:1 - 75 bpm
  2. Saw tooth flutter waves
    1. May be difficult to visualize at a 2:1 AV Block due to overlapping QRS Complex and T Wave
  3. Images
    1. cvEKGAtrialFlutter4to1sawtooth.jpg
  • Management
  1. See Atrial Fibrillation Management