An electrocardiogram (ECG or EKG) is a simple, fast, and non-invasive procedure that records the electrical activity of the heart over a period of time. Using electrodes attached to the skin, ECGs detect and amplify the tiny electrical changes on the skin that are caused when the heart muscle depolarizes during each heartbeat. This test is a crucial tool in the diagnosis and monitoring of heart conditions.
During an ECG, you will be asked to lie down. Several electrodes — small, sticky patches — will be attached to your arms, legs, and chest. These electrodes are connected by wires to an ECG machine. You'll need to remain still and may be asked to hold your breath briefly while the heart's electrical activity is recorded. The entire process usually takes about 10 minutes.
ECGs are used to:
You may need an ECG if you have symptoms of heart disease such as chest pain, palpitations, shortness of breath, dizziness, or fainting. ECGs can also be used to monitor the effectiveness of medications or mechanical devices like pacemakers.
Seek an ECG if you experience:
There is no special preparation required for a standard ECG. You can eat and drink as usual and take your medications unless otherwise directed. After the test, you can return to your normal activities immediately.
While an ECG itself is not preventive, maintaining a heart-healthy lifestyle can help prevent heart disease and the conditions ECGs detect. This includes:
In summary, ECGs are a critical diagnostic tool that provides valuable information about the heart's condition. They are quick, safe, and painless, with no special preparation needed. By combining regular ECG screenings with a healthy lifestyle, you can take proactive steps toward maintaining heart health and preventing heart disease.