Will one beer show in a ekg test?

It is unlikely that drinking one beer will show up on an electrocardiogram (ECG) test. ECG tests measure the electrical activity of the heart and can detect abnormalities such as heart rhythm disturbances or damage to the heart muscle. While alcohol can affect the heart, it is unlikely that a single beer would cause any significant changes that would be noticeable on an ECG. However, if you have a history of heart disease or are under the influence of alcohol during the test, it may be best to inform your doctor before taking the test.