In most cases, "breathlessness" develops inconspicuously for many years and the patient gradually adapts. The realization comes only when ability to perform normal everyday activities such as cooking, shopping, inability to climb up the stairs, or a sudden and marked worsening of pain during otherwise "banal" infection of respiratory tract, which not infrequently requires hospitalization. Loss of breath in the most advanced stages creates difficulties with personal hygiene and mobility.
says MUDr. Jiří Votruba, Ph.D