Document Detail

Effect of heart rate on pressure half-time in patients with mitral stenosis.
MedLine Citation:
PMID:  1515973     Owner:  NLM     Status:  MEDLINE    
The effect of heart rate on pressure-half time has been controversial. This study attempted to clarify this issue in patients with mitral stenosis. Twenty cases were enrolled, 10 with atrial fibrillation and 10 with sinus rhythm. Twenty beats were analyzed for each patient. The results showed that in patients with atrial fibrillation the pressure half-time was hardly measurable in the cardiac cycles with a ventricular rate more than 100/min; by excluding these fast beats, the pressure half-time showed no relationship with the heart rate. Similarly, there was no significant correlation between heart rate and pressure half-time in patients with sinus rhythm when the heart rate was less than 70/min. However, if the sinus rate was more than 70/min, the correlation became statistically significant. We conclude that when using pressure half-time to derive mitral valve area we should avoid to use the beats with ventricular rate greater than 100/min in patients with atrial fibrillation. In patients with sinus rhythm, we should try to use those beats with heart rate greater than 70/min if possible. Otherwise, significant error may occur.
C W Chiang; W G Cherng; F J Chang; F C Lin; B R Fang; C T Kao; Y S Lee
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Changgeng yi xue za zhi / Changgeng ji nian yi yuan = Chang Gung medical journal / Chang Gung Memorial Hospital     Volume:  15     ISSN:  -     ISO Abbreviation:  Changgeng Yi Xue Za Zhi     Publication Date:  1992 Jun 
Date Detail:
Created Date:  1992-10-02     Completed Date:  1992-10-02     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  9809559     Medline TA:  Changgeng Yi Xue Za Zhi     Country:  TAIWAN    
Other Details:
Languages:  eng     Pagination:  72-7     Citation Subset:  IM    
Department of Internal Medicine, Chang Gung Memorial Hospital, Taipei, Taiwan, R.O.C.
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MeSH Terms
Atrial Fibrillation / physiopathology
Heart Rate*
Middle Aged
Mitral Valve Stenosis / physiopathology*

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