What does the term "tachycardia" refer to?

Tachycardia specifically refers to an abnormally rapid heart rate, generally defined as exceeding 100 beats per minute in adults. This condition can occur due to various factors including stress, anxiety, physical activity, or underlying medical conditions. The physiological mechanism behind tachycardia involves increased electrical activity in the heart, which can lead to faster contractions and higher heart rates. Understanding this term is crucial for recognizing potential health issues related to heart function and can guide appropriate medical interventions.