A changing shape of the P wave in lead II on an ECG suggests atrial depolarization abnormalities.
The pattern of only half of the P waves followed by a QRS complex and T waves is indicative of a potential second-degree heart block or other cardiac rhythm disturbances.
When analyzing an electrocardiogram (ECG), specifically considering lead II, the P wave represents atrial depolarization, which precedes atrial contraction and subsequent ventricular filling. If the shape of the P wave changes in lead II, this could indicate an abnormality in atrial depolarization which often suggests underlying cardiac pathology or disturbance.
This could be due to various conditions such as atrial enlargement, atrial hypertrophy, or abnormal conduction pathways.