The ECG findings include:
1. Normal sinus rhythm
2. Premature atrial contractions in a pattern of atrial bigeminy
In atrial bigeminy every second beat is a PAC resulting in an regularly irregular rhythm on cardiac auscultation. You can see that the second beat in each group has a different P wave morphology than the first indicating that it is originating from a different place in the atrium than the sinus node.