Inverted P wave

An inverted P wave is a deflection on an electrocardiogram (ECG) that appears downward instead of upward, indicating abnormal atrial depolarisation, often seen in conditions like ectopic atrial rhythms or atrial enlargement. Clinically, it is significant as it can indicate underlying cardiac issues, such as atrial fibrillation or other arrhythmias, which may lead to complications like stroke or heart failure if not addressed. Recognising inverted P waves is crucial for accurate diagnosis and management.