Cough Reflex Test (CRT) Practice Exam 2026 - Free CRT Practice Questions and Study Guide

A Cheyne-Stokes breathing pattern is characterized by a cyclical pattern of respiratory depth and rate, alternating between periods of deep breathing and periods of apnea (no breathing). This pattern generally indicates an underlying issue within the central nervous system or significant cardiac problems.

The reason option B is correct is that Cheyne-Stokes respiration is often associated with conditions such as central nervous system diseases (like stroke or brain injury) or severe congestive heart failure. In these conditions, the brain's respiratory centers may become impaired, causing fluctuations in breathing patterns.

In contrast, other options do not typically present with Cheyne-Stokes respiration. Severe allergic reactions might provoke wheezing or difficulty breathing, but not this particular breathing pattern. Asthma exacerbations usually manifest as wheezing and increased work of breathing rather than the cyclical nature of Cheyne-Stokes. A simple upper respiratory infection may cause symptoms such as coughing or congestion, but it would not typically affect the breathing rhythm in the distinct manner seen in Cheyne-Stokes respiration.