What is the duration of a normal P-wave?

The duration of a normal P-wave is typically between 0.06 and 0.12 seconds. This range reflects the time it takes for atrial depolarization to occur, which is the electrical activity that triggers the contraction of the atria. When evaluating an electrocardiogram (ECG), a P-wave that falls within this duration range indicates that the atria are depolarizing normally.

If the P-wave duration exceeds this range, it may suggest conditions such as atrial enlargement or other cardiac issues. Thus, understanding the normal duration of the P-wave is crucial for interpreting ECGs accurately and for assessing the overall health of the heart's electrical conduction system.