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Atrioventricular conduction time in fetuses assessed by Doppler echocardiography.

Authors
Type
Published Article
Journal
Physiological research / Academia Scientiarum Bohemoslovaca
Publication Date
Volume
60
Issue
4
Pages
611–616
Identifiers
PMID: 21574757
Source
Medline
License
Unknown

Abstract

We performed measurement of mechanical atrioventricular conduction time intervals in human fetuses assessed by Doppler echocardiography and provided reference values. We found that atrioventricular conduction time interval was prolonged with gestational age and decreased with increasing fetal heart rate. No correlation between gestational age and heart rate was found. Using normal limits established by this study, mechanical atrioventricular interval >135 ms in the 20(th) week and/or >145 ms in the 26(th) week of gestation could be suspected of having the first-degree AV block. We compared reference values with fetuses of mothers with anti-SSA Ro/SSB La autoantibodies, being in risk of isolated congenital heart block development. One of 21 fetuses of mothers with positive autoantibodies was affected by prolonged atrioventricular interval according to the established limits, with sinus rhythm after the birth.

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