When measuring the P-P Interval, which part of the waveform do you focus on?

The P-P interval is measured specifically between two consecutive P waves on an ECG. This interval represents the time it takes for one complete cycle of atrial depolarization to occur, which is key in assessing the heart's rhythm and conductivity in the atria. Focusing on the P waves allows practitioners to analyze the regularity and rate of atrial pacing, which is vital for identifying conditions such as atrial fibrillation or other arrhythmias. Understanding this interval is essential for interpreting the overall health of the cardiac cycle as it reflects atrial activity directly. The other waveforms and segments, such as QRS complexes, T waves, and QT segments, pertain to different aspects of cardiac activity and thus are not relevant when specifically measuring the P-P interval.