afib vs aflutter

Atrial flutter mechanism

Single irritable focus, AV node blocks impulses to ventricles

Atrial fibrillation mechanism

Multiple foci, atrium depolarizes repeatedly, may lead to stroke, quivering atria

Atrial Flutter Regularity

P-waves are regular, but p-wave to QRS ratio Can be fixed ratio, or variable ratio VVR

Atrial fib regularity

Grossly irregular

Atrial flutter rate

Atrial rate is >214 bpm, no set ventricular rate

Atrial fibrillation rate

Atrial rate is unmeasurable; Ventricular rate is SVR<60bpm, CVR 60-100bpm, or RVR:>100bpm

Atrial flutter p-wave

flutter waves, sawtooth

Afib P-waves

chaotic, no discernable p-wave

A flutter PR interval

N/A

A fib p-waves

Non-discernable

Afib SVR

Afib CVR

Aflutter 4:1

A flutter variable conduction vvr