What does the term "tachycardia" refer to?

Tachycardia refers specifically to a condition in which the heart rate exceeds the normal resting rate, typically defined as being greater than 100 beats per minute. This elevated heart rate can occur during physical activity, stress, or as a result of various medical conditions. In clinical practice, tachycardia can be a significant indicator of underlying issues, such as heart disorders, dehydration, or hyperthyroidism. Understanding this term is crucial in the context of dysrhythmias, as it helps healthcare professionals identify and treat patients who may require intervention for potentially harmful elevated heart rates.