What does tachycardia refer to?

Tachycardia refers to an abnormally rapid heartbeat, typically defined as a resting heart rate of more than 100 beats per minute in adults. This condition can occur due to a variety of factors, including stress, anxiety, fever, medical conditions like hyperthyroidism, or dehydration, as well as as a response to vigorous exercise. Understanding tachycardia is important because it can be a sign of underlying health issues and may require medical evaluation to determine the cause and appropriate treatment.