The most common sign of COPD is actually an increase in the anteroposterior diameter of the patient’s thorax, which is auscultated. On palpation, the patient’s fibrillation is increased, on percussion, the patient’s breath sounds are decreased, and on auscultation, the patient’s breath sounds are decreased. The most obvious sign is the increase of the anterior and posterior diameter of the thorax, and some patients may achieve the same anterior and posterior thorax, i.e. barrel-shaped chest, and some patients can see the signs of emphysema if they take a film. On auscultation, the heart border is small, i.e., the patient seems to have a small heart, but in fact it is not small. On auscultation, the patient’s breath sounds are weak and heart sounds can be heard to be more distant. The heart rate of such patients is usually fast, sometimes reaching more than 100 times per minute in a hypoxic state. Other patients may develop heart rhythm disturbances, such as premature beats or atrial fibrillation, i.e., signs of pulmonary heart disease.