Let me preface this by saying that I am a paramedic and well-versed in reading ECG’s. When they talk about normal morphology, they are meeting that your heart has no electrical abnormalities that would change the conduction routes through the heart. Normal rhythms would be considered to be regular between beats, with a heart rate, less than 150. Usually we would consider those rhythms to be normal sinus rhythm, sinus bradycardia and sinus tachycardia. I myself have an abnormal morphology. Something termed, right bundle, branch block, which changes the conduction of electricity, through the right ventricle of my heart. This shows up on frontier as .25 heart strain, and other rhythm.

I just recorded 5 min strip. I had 8 pvcs but it said I was in an other rhythm for 33% of the time.