Atrial flutter is similar to atrial fibrillation ... the heart rhythm will be frequently tachycardic and usually regular but, as above, may be irregularly irregular if variable conduction is ...

In this situation, the ventricular (QRS) rate will be exactly 150 bpm and regular ... irregular, including atrial fibrillation and multifocal atrial tachycardia, or MAT. Atrial flutter can ...