Progressive dyspnea--comprehensive evaluation of a common symptom

Area of Science:

• Pulmonology
• Internal Medicine

Background:

• Dyspnea is a common clinical symptom, often stemming from respiratory or cardiovascular issues, but its underlying mechanism can be challenging to pinpoint.
• Accurate diagnosis is essential for effective management of breathlessness.

Observation:

• A 75-year-old male ex-smoker presented with progressive dyspnea.
• Initial assessments revealed severe emphysema and mild obstructive syndrome.

Findings:

• Despite mild spirometry findings, the patient exhibited severe impairment in the diffusing capacity of the lung for carbon monoxide (DLCO).
• This impairment was attributed to an inhomogeneous ventilation/perfusion ratio, indicating a specific phenotype of chronic obstructive pulmonary disease (COPD).

Implications:

• This case underscores the importance of utilizing advanced functional assessments, such as DLCO estimation, in diagnosing COPD.
• Accurate diagnosis, even with atypical spirometry results, is vital for managing debilitating dyspnea and improving patient outcomes.