Which condition is characterized by an abnormally rapid breathing rate?

Tachypnea refers specifically to an unusually rapid breathing rate, typically defined as a respiratory rate exceeding 20 breaths per minute in an adult. This condition can result from various factors such as anxiety, fever, or respiratory illnesses that increase the body's demand for oxygen and the need to expel carbon dioxide. Recognizing tachypnea is essential in clinical practice as it can be a critical indicator of underlying health issues that may require prompt medical attention.

On the other hand, apnea describes a temporary cessation of breathing, which is the opposite of an increased respiratory rate. Bradypnea refers to an abnormally slowed breathing rate, typically fewer than 12 breaths per minute, highlighting a different respiratory concern. Stridor is a high-pitched sound produced during breathing, often indicative of an airway obstruction, and does not directly pertain to the rate of breathing itself. Understanding these distinctions is critical for accurate assessment and management of patients.