the P wave morphology would be different from the normal sinus P wave morphology. When every other QRS complex is a premature atrial contraction, then the rhythm is referred to as “atrial ...

If there is a P wave before every QRS complex ... coming from somewhere other than the sinus node. The second ECG strip below shows an ectopic atrial rhythm. Note that the P wave is down in ...

Single ventricular premature ... the next sinus complex; otherwise, sinus depolarization would suppress it 2,3. Figure 2: An ECG obtained from a beagle dog 21 days later, showing six rhythm ...