Document Detail

Ventilatory control of heart rate during inhalation of 5% CO2 and types of panic attacks.
MedLine Citation:
PMID:  1804854     Owner:  NLM     Status:  MEDLINE    
Differences in the magnitude of increases in heart rate during prolonged inhalation of 5% CO2 range from a mean of 25 b/min for a group of eight panic-disorder patients who panicked (Woods, Charney, Goodman, & Heninger, 1988. Archives of General Psychiatry, 45, 43-52) to zero b/min for 16 patients, eight of whom panicked (Craske & Barlow, 1990. Journal of Abnormal Psychology, 99, 302-307). What accounts for this disparity? The present paper describes how heart rate can be increased by means of voluntary overbreathing during prolonged inhalation of 5% CO2 in air. This suggests that differences in the degree of overbreathing may explain differences in the magnitude of increases in heart rate during inhalation of 5% CO2. An explanation is also offered for the curious finding that some patients experience "panic attacks" with zero increase in heart rate. Evidence suggests that this is likely to happen in cognitively based panic attacks, in contrast to hyperventilatory attacks or anticipatory attacks.
R Ley
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Publication Detail:
Type:  Case Reports; Journal Article    
Journal Detail:
Title:  Journal of behavior therapy and experimental psychiatry     Volume:  22     ISSN:  0005-7916     ISO Abbreviation:  J Behav Ther Exp Psychiatry     Publication Date:  1991 Sep 
Date Detail:
Created Date:  1992-05-04     Completed Date:  1992-05-04     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0245075     Medline TA:  J Behav Ther Exp Psychiatry     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  193-201     Citation Subset:  IM    
SUNY, Albany 12222.
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MeSH Terms
Arousal / physiology*
Carbon Dioxide / diagnostic use*
Fear / physiology
Heart Rate / physiology*
Hyperventilation / diagnosis,  physiopathology,  psychology
Middle Aged
Panic Disorder / diagnosis,  physiopathology*,  psychology
Reflex / physiology
Respiration / physiology*
Tidal Volume / physiology
Reg. No./Substance:
124-38-9/Carbon Dioxide

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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