Final answer:
The correct interpretation of an ECG with wide and notched P waves, or 'p mitrale,' is indicative of an enlarged left atrium, often due to severe mitral stenosis.
Step-by-step explanation:
An ECG with wide and notched P waves/biphasic indicates the presence of atrial enlargement. Specifically, a wide and notched P wave, often termed "p mitrale," is typically associated with an enlarged left atrium which can be a result of several heart conditions, including severe mitral stenosis. The correct answer to the ECG question is: A. Enlarged left atrium, "p mitrale," severe mitral stenosis. The P wave on an ECG represents the depolarization of the atria. When the left atrium enlarges, it takes longer for the electrical impulse to travel across it, which can lead to a broad, bifid P wave that is seen in mitral stenosis or other conditions affecting the left atrium.