Sinus rhythm (a.k.a. normal sinus rhythm) refers to the normal heart beat originating from the sinoatrial node. This is manifested as an upright P wave in lead II of the ECG. Sinus bradycardia ...

To understand the difference between normal sinus rhythm and sinus arrhythmia, it's best to start by exploring the role of an ...

then the term “ectopic atrial rhythm” is used. Because the origination of this electrical activity is not from the sinus node, the P wave would not have its normal sinus appearance ― that is ...

AFib causes an irregular heart rate that can make your heart feel as if it is fluttering or skipping beats. Panic attacks, on ...

They are characterized by premature, wider-than-normal ... sinus depolarization would suppress it 2,3. Figure 2: An ECG obtained from a beagle dog 21 days later, showing six rhythm strips ...