What is the medical term for an abnormally rapid heart rate?

Tachycardia refers to an abnormally rapid heart rate, typically defined as a resting heart rate of over 100 beats per minute in adults. This condition can arise from various factors, including stress, anxiety, fever, or certain medical conditions. It is essential to understand tachycardia because it can be symptomatic of underlying health issues that may require medical attention or management.

Bradycardia, on the other hand, is characterized by a slower than normal heart rate, while arrhythmia describes any irregularity in the heart's rhythm. The term hexakardia is not a recognized medical term. Therefore, the identification of tachycardia as the correct answer helps clarify the specific condition in question. Understanding these terms is crucial, particularly in a context where cardiovascular responses can be influenced by various substances, including drugs.