Certified Cardiographic Technician (CCT) Practice Exam 2025 - Free CCT Practice Questions and Study Guide

The primary purpose of an electrocardiogram (ECG) is to assess the electrical activity of the heart. This non-invasive test records the electrical impulses that trigger each heartbeat, allowing healthcare providers to observe the timing and duration of each phase of the heart's electrical cycle. It provides vital information about the heart's rhythm, electrical conduction pathways, and can help identify abnormalities such as arrhythmias, ischemia, or other heart-related conditions.

The other options do not pertain to the function of an ECG: measuring blood pressure is a separate process involving sphygmomanometers; echocardiography is an imaging technique that uses sound waves to create pictures of the heart, assessing its structure and function; evaluating lung function typically involves procedures such as spirometry, which assesses airflow and lung capacity. These distinct processes highlight the unique role of the ECG in cardiology.