Transcription of SECTION 2, DEFINITION, PATHOPHYSIOLOGY AND …
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SECTION 2, definition , PATHOPHYSIOLOGY and pathogenesis of Asthma, and Natural History of Asthma 11 August 28, 2007 SECTION 2, definition , PATHOPHYSIOLOGY AND pathogenesis OF ASTHMA, AND NATURAL HISTORY OF ASTHMA KEY POINTS: definition , PATHOPHYSIOLOGY AND pathogenesis OF ASTHMA, AND NATURAL HISTORY OF ASTHMA Asthma is a chronic inflammatory disorder of the airways. This feature of asthma has implications for the diagnosis, management, and potential prevention of the disease. The immunohistopathologic features of asthma include inflammatory cell infiltration: Neutrophils (especially in sudden-onset, fatal asthma exacerbations; occupational asthma, and patients who smoke) Eosinophils Lymphocytes Mast cell activation Epithelial cell injury Airway inflammation contributes to airway hyperresponsiveness, airflow limitation, respiratory symptoms, and disease chronicity.
Section 2, Definition, Pathophysiology and Pathogenesis of Asthma, and Natural History of Asthma 14 August 28, 2007 As a guide to describing asthma and identifying treatment directions, a working definition of asthma put forth in the previous Guidelines remains valid: Asthma is a chronic inflammatory
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