ECG, EKG or electrocardiogram is performed to measure the heart activity. There are many condition which require EKG including heart specific and other factors which cause heart problems. One of these problems is alcoholic cardiomyopathy. This is a condition which is caused by heavy alcohol drinking for longer periods. Single pack of beer will not affect heart and EKG results. If you wanted to ask about EtG test for alcohol addiction then you will be tested positive for 80 hours.