One way to say "heartbeat acceleration" in Engpsh is "tachycardia." This term refers to a rapid heartbeat, which is typically defined as a heart rate that is greater than 100 beats per minute. In medical settings, tachycardia is often a sign of an underlying medical condition, such as heart disease or a thyroid disorder. In some cases, it can also be caused by stress, anxiety, or certain medications. If you are experiencing tachycardia, it is important to talk to your doctor to determine the cause and get the appropriate treatment.