What is the term used for difficulty in breathing?

The term used for difficulty in breathing is "dyspnea." This term encompasses a range of breathing difficulties, including sensations of shortness of breath, a feeling of not getting enough air, or labored breathing. Dyspnea can be a symptom of various underlying conditions, such as asthma, chronic obstructive pulmonary disease (COPD), heart failure, and anxiety.

Understanding the other terms helps clarify why dyspnea is the correct choice. Hyperventilation refers to rapid or deep breathing that can lead to decreased carbon dioxide levels, causing lightheadedness or tingling sensations. Apnea describes a temporary cessation of breathing, which is not the same as difficulty in breathing. Bradypnea indicates an abnormally slow rate of breathing, typically less than 12 breaths per minute, which is also distinct from simply having difficulty breathing. Thus, dyspnea specifically targets difficulty in breathing rather than changes in breath rate or rhythm.