The best replacement for sinus rhythm is atrial rhythm.

The best alternatives to sinus rhythm are rated as following:
★★★★★  atrial rhythm
★★★★★  normal sinus rhythm
★★★★★  ventricular rhythm
★★★  atrial fibrillation
★★★  sinus rhythm
★★★  sinus tachycardia
★★  sinus arrhythmia
★★  sv rhythm
★  junctional rhythm

Your alternative for sinus rhythm is not listed? Suggest!
Speaking about sinus rhythm, one probably shouldn't forget about pvc.

Other search terms related to sinus rhythm and their ratings are:
★★★★★ pvc
★★ 1st degree av block
★ left axis deviation
You have in mind a companion for sinus rhythm and it is not yet here? Propose!



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sinus rhythm
atrial rhythm
normal sinus rhythm