Dyspnoea: Pathophysiology and a clinical approach

Coccia, Cecilia B I; Palkowski, Gregori H; Schweitzer, Beverley; Motsohi, Tshepo; Ntusi, Ntobeko

Dyspnoea: Pathophysiology and a clinical approach

Journal Article

2015

Journal Title

South African Medical Journal

Link to Journal

https://dx.doi.org/10.7196/SAMJ.2016.v106i1.10324

Department

Department of Public Health and Family Medicine

Faculty

Faculty of Health Sciences

Abstract

Dyspnoea, also known as shortness of breath or breathlessness, is a subjective awareness of the sensation of uncomfortable breathing. It may be of physiological, pathological or social origin. The pathophysiology of dyspnoea is complex, and involves the activation of several pathways that lead to increased work of breathing, stimulation of the receptors of the upper or lower airway, lung parenchyma, or chest wall, and excessive stimulation of the respiratory centre by central and peripheral chemoreceptors. Activation of these pathways is relayed to the central nervous system via respiratory muscle and vagal afferents, which are consequently interpreted by the individual in the context of the affective state, attention, and prior experience, resulting in the awareness of breathing. The clinical evaluation and approach to the management of dyspnoea are directed by the clinical presentation and underlying cause. The causes of dyspnoea are manifold, and include a spectrum of disorders, from benign to serious and life-threatening entities. The pathophysiology, aetiology, clinical presentation and management of dyspnoea are reviewed.