The image shows a television screen displaying an electrocardiogram (ECG) or EKG, which is a medical imaging technique used to visualize the electrical activity of the heart. The ECG is shown in a horizontal format with a series of lines representing the electrical signals that occur during the cardiac cycle. The lines are arranged in a pattern that represents the heart's electrical activity, including the QRS complex and the T wave. The ECG is often used to diagnose heart conditions such as arrhythmias, myocardial infarction, and other heart diseases.