What physiological response is indicated by tachycardia?

Tachycardia is defined as an abnormally fast heart rate, typically over 100 beats per minute in adults. When evaluating physiological responses, recognizing tachycardia as an increase in heart rate is essential, as it is a common indicator of various underlying conditions or reactions, such as stress, anxiety, fever, or even the influence of certain drugs.

This increased heart rate can be a response to physical activity, emotional stress, or the presence of certain stimulants, which may contribute to the clinical assessments made during a drug recognition evaluation. Understanding tachycardia facilitates better insights into a person's physiological state and potentially their substance use or health status, making it a significant marker in the context of drug recognition.