Tachycardia can be diagnosed by an electrocardiogram (ECG), by auscultation of the heartbeat or by palpating the radial artery, which is considered to be too fast if it exceeds 100 beats per minute. The normal heart rate is between 60 and 100 beats per minute, and more than 100 beats per minute is considered a rapid heart rate. The most accurate way to determine the heart rate is to perform an electrocardiogram (ECG), which calculates the number of ventricular rate beats, or to listen to the heart and count the number of beats per minute in order to determine the presence of a fast heart rate; A simpler way to determine the presence of a fast heart rate is to touch the radial artery at the wrist and count the number of radial artery beats. In most cases, the number of radial artery beats reflects the number of heartbeats, but this does not apply to patients with atrial fibrillation. If there is a rapid heart rate, may also be accompanied by panic, chest tightness, dizziness, it is recommended to go to the hospital cardiology department as soon as possible.