What technology is used to produce a visual record of the heart's electrical activity?

The technology that produces a visual record of the heart's electrical activity is the Electrocardiograph (EKG). This device measures the electrical impulses that trigger each heartbeat. By placing electrodes on the skin, the EKG captures the timing and strength of these electrical signals, which reflect how well the heart is functioning.

The resulting graph, known as an electrocardiogram, provides important information about heart rate, rhythm, and overall cardiac health. An EKG is essential for diagnosing various heart conditions, such as arrhythmias, heart attacks, and other cardiovascular diseases. Understanding the heart's electrical activity is crucial for ensuring effective treatment and management of such conditions.

In contrast, ultrasound is primarily used for imaging internal organs and tissues using sound waves, while X-rays are used to visualize bones and certain structures inside the body through radiation. An anemometer is a device for measuring wind speed and is unrelated to heart activity. Thus, the Electrocardiograph stands out as the specific technology for monitoring and recording the heart's electrical impulses.