How to Identify Sinus Rhythm on ECG

How to identify sinus rythm on ECG- I'll give you a hint, it's NOT a 'P-wave before every QRS. Not sure where in medical education this came from (and no judgement bc I remember during med school being educated on this topic too). The answer is actually even more simple! Just look for upright P-waves inferiorly and inverted in aVR #cardiology #cardiologist #internalmedicine #fellowship #cardiologyfellow #residency #physician #residentphysician #ecgtips #NursingTips