Atrioventricular Flow Wave Patterns before and after Birth by Fetal Echocardiography
Journal of Cardiovascular Ultrasound
;
: 85-89, 2012.
Article
in English
| WPRIM
| ID: wpr-210082
ABSTRACT
BACKGROUND:
Doppler echocardiographic measurements of both valves during intrauterine life can be used to calculate peak early filling velocity (E)/late peak atrial filling velocity (A) ratio as a single index of diastolic performance. The purposes of this study were to estimate the changes in atrioventricular valve flow from gestational age 37-40 weeks to 1 month of postnatal life and to clarify the difference in right and left ventricular diastolic filling patterns.METHODS:
Atrioventricular flow waves were analyzed in 24 full-term pregnant women by fetal echocardiography. Postnatal follow-up studies were performed at 1 hour, 6 hours, 24 hours, 3 days, 1 week and 1 month. In each time point, pulsed Doppler echocardiography was used to interrogate Doppler waveform of E velocity, A velocity, total area under the curve (time velocity integral) and heart rate.RESULTS:
Mitral E/A ratio significantly increased from 0.7 +/- 0.1 before birth to 1.0 +/- 0.3 at postnatal 1 hour, 1.0 +/- 0.2 at 1 week, and 1.5 +/- 1.0 at 1 month. Tricuspid flow E/A ratio was 0.8 +/- 0.3 before birth, 0.8 +/- 0.1 at 1 hour, 0.8 +/- 0.2 at 3 days, 0.9 +/- 1.0 at 1 month. Time velocity integral of tricuspid flow was significantly higher than that of mitral flow before birth, but there was no difference after birth.CONCLUSION:
The dominance of mitral A wave before birth was changed very quickly after birth to the dominance of E wave, but the dominance of tricuspid A wave was maintained at 1 month. Diastolic function and compliance of mitral valve were better than those of the tricuspid valve after birth.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Tricuspid Valve
/
Echocardiography
/
Follow-Up Studies
/
Gestational Age
/
Compliance
/
Echocardiography, Doppler, Pulsed
/
Parturition
/
Pregnant Women
/
Heart
/
Mitral Valve
Type of study:
Observational study
/
Prognostic study
Limits:
Female
/
Humans
Language:
English
Journal:
Journal of Cardiovascular Ultrasound
Year:
2012
Type:
Article
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