Dyspnoea is a subjectively unpleasant feeling of breathing deficiency that can arise from a variety of pathological conditions. In the differential diagnosis, the so-called relief position, which the patient takes spontaneously, and which is related to pathogenesis can help.
In the relief position the patient can optimally utilize the accessory respiratory muscles, the distribution of ventilation and perfusion in the lungs or increase venous return and right heart filling pressures. Orthopnoea links the decompensation of many chronic diseases.
In contrast, platypnoe is a relatively rare condition that can guide us quite accurately in diagnosis.