ECG and EKG are the same procedure used to measure the heart’s electrical activity. The machine is called an electrocardiograph and detects electrical impulses through wired electrodes. It is a painless and noninvasive procedure with no risk of electric shock, and is used to diagnose heart problems.
“Electrocardiogram” (ECG) is the English-language version of the German word “elektrokardiogramm” (ECG). Both words refer to the same procedure, which is used to measure the heart’s electrical activity and diagnose heart problems. There is no difference between an EKG and an EKG, except for the spelling. Both EKG and EKG are correct terms, however, in America the procedure is usually referred to as ECG to distinguish it from the similar-sounding abbreviation for electroencephalogram (EEG), which measures electrical brain waves rather than electrical heart waves. Other countries besides America tend to use the abbreviation ECG more commonly, although this is not always the case.
The root of the word “electro” or “elektro” means electricity. “Cardio” or “kardio” is used to refer to the heart. “Gram” or “gram” means writing. The procedure is called an EKG and EKG because it uses a device to measure the electrical impulses produced by the heart and then record, or write down, these results for a doctor to analyze.
The ECG and EKG machine, called an electrocardiograph, is attached to the body at specific points via wired electrodes. Electrical impulses in the heart signal the heart muscle to contract, which causes a heartbeat. These electrical impulses can be detected through the skin by the electrocardiograph electrodes. Record electrical signals, in the form of wavy lines, digitally on a computer screen or on a piece of paper using moving ink needles. These machines are sensitive enough to detect small irregularities, which can then be used to diagnose many types of heart problems.
The procedure itself is painless, noninvasive, and generally resolves quickly, within a period of a few minutes, including the time it takes to set up and take down the machine and electrodes. Many people are alarmed at the thought of a power tool attached to the body and often worry about the risk of electric shock. People with pacemakers also often worry that the procedure will interfere with the pacemaker. During an EKG or EKG, however, no electricity is actually passed through the body; the device is simply used to sense the body’s electrical energy. EKGs or EKGs are generally considered free of health risks and complications, although some people may develop skin irritation or allergic reactions to the adhesive used on the electrodes.
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