Diagnostic approach of pneumonia in an elderly patient with comorbidities--case report.

Dyspnea is one of the symptoms that has a major impact on patients' health, with a negative influence on the quality of life. The main causes of dyspnea are cardiac, pulmonary and mixed (cardiac or pulmonary). There are several other causes such as metabolic conditions (acidosis), pain, neuromuscular disorders, otorhinolaryngeal disorders, anxiety, panic disorders and hyperventilation.