Which atrial dysrhythmia shows chaotic, disorganized activity between normal, but irregular, QRS complexes?

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The described rhythm is indicative of atrial fibrillation, where there is erratic, disorganized electrical activity in the atria resulting in an irregularly irregular ventricular response. Premature atrial complexes are premature beats with abnormal P waves that may interrupt the underlying rhythm. Multifocal atrial tachycardia is characterized by at least three different P wave morphologies with a rate greater than 100 beats per minute. Atrial flutter is characterized by a sawtooth pattern in the P waves with a regular ventricular response.

Which Atrial Dysrhythmia Shows Chaotic, Disorganized Activity Between Normal, but Irregular