An amazing explanation regarding PAC is provided in this video. Three ECGs are presented in the video and then different types of Premature Atrial Contraction are explained. Timeline 0:00 Introduction 0:25 Explanation of Premature Atrial contraction 3:37 Rate and rhythm of first ECG strip 8:19 Rate and rhythm of 2nd ECG strip 12:20 Diagnosis for 2nd ECG 12:51 Rate and rhythm of 3rd ECG strip 16:22 Diagnosis for 3rd ECG