SINUS ARRHYTHMIA, or sinus irregularity. Despite the fact that PP intervals vary by >=0.16 second, all P waves and PR intervals are identical in any single lead. This is important in differentiating sinus irregularity (a normal variant) from wandering atrial pacemaker (WAP) or multifocal atrial tachycardia (MAT).

 

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Cardiovalens/cvd_demo/cvd/Cases