Which term refers to an abnormal rapid heartbeat?

Tachycardia is the correct term that refers to an abnormal rapid heartbeat, characterized by a resting heart rate exceeding 100 beats per minute in adults. This condition can arise from a variety of factors, including stress, anxiety, medications, or underlying health issues such as heart disease or anemia. Understanding this term is crucial in medical settings, as it helps healthcare professionals evaluate a patient's cardiovascular health and determine appropriate interventions.

Bradycardia refers to a slower than normal heart rate, usually defined as fewer than 60 beats per minute. Arrhythmia represents any irregularity in heart rhythm, which can include both tachycardia and bradycardia. Palpitations describe the sensation of feeling one's heartbeat, which can feel rapid or irregular, but does not specifically define the condition of having a rapid heartbeat. Recognizing these distinctions is essential for reliable communication in medical contexts and for effective patient care.