Nervousness can affect the results of an EKG. A person’s heart will beat too fast when they are nervous, and a fast heartbeat will be recognized as tachycardia when an EKG is done, which is also a type of arrhythmia. Nervousness also causes sympathetic arousal, which overproduces dopamine in the body and can also lead to uncomfortable conditions for the patient. If you are nervous during an ECG, take a deep breath and calm down before doing the ECG. If the electrocardiogram is recognized as tachycardia, you should also promptly inform the doctor that you are currently in a state of nervousness, and you can do a retest, so as to exclude the diagnosis of some unnecessary diseases and to achieve the best results of the examination.