, Volume 168, Issue 1, pp 179–184 | Cite as

Asthma: The pulse is not the paradox

  • M. Henry Williams


Some interesting, unusual features of asthma are discussed: that patients may be better able to evaluate the severity of their asthma than physicians; that expiratory obstruction indirectly increases the work of inspiration; that 1 of the responses to airflow obstruction is hyperventilation; that localized areas of airflow obstruction may cause increased ventilation/perfusion ratios by decreasing perfusion more than ventilation; that increasing tidal volume may cause a reduction in alveolar ventilation; and, finally, that there is evidence that asthma has worsened in recent years, despite advances in the understanding and treatment of this disease.

Key words

Asthma Airflow obstruction 


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Copyright information

© Springer-Verlag 1990

Authors and Affiliations

  • M. Henry Williams
    • 1
  1. 1.Chest ServiceBronx Municipal Hospital CenterBronxUSA

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