What is the meaning of "abnormal heart rate" in medical terms?

An "abnormal heart rate" in medical terms refers specifically to arrhythmia, which encompasses a range of conditions that involve irregular heartbeat patterns. This can include a heart rate that is too fast, too slow, or follows an irregular rhythm. Arrhythmias can be caused by various factors, including heart disease, electrolyte imbalances, and other health conditions.

The term suggests that the heart is not functioning optimally, which can lead to insufficient blood flow to the body's organs and tissues, potentially resulting in symptoms like palpitations, dizziness, or even more serious complications. The distinction from other terms like bradycardia (slow heart rate) and tachycardia (fast heart rate) is important, as these are specific types of arrhythmias but do not encompass the broader category defined by the term "abnormal heart rate."