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Estimating Fetal Gestational Age Using Cardiac Valve Intervals

Faezeh Marzbanrad, Ahsan Habib Khandoker, Yoshitaka Kimura, Marimuthu Palaniswami, Gari Clifford
2016 2016 Computing in Cardiology Conference (CinC)   unpublished
A new automated method for estimation of the gestational age is presented in this paper based on the intervals between fetal cardiac valve timings and the Q-wave of fetal electrocardiogram (fECG).  ...  Since valve intervals reflect the autonomic function, this method provides a novel measure of the development of fetal autonomic nervous system that may be growth curve independent.  ...  Discussion and Conclusion In this paper a new GA estimator using fetal cardiac valve intervals is proposed.  ... 
doi:10.22489/cinc.2016.035-146 fatcat:lbiatv63bjbbjoxdyuwz7fldo4

Fetal Cardiac Timing Events Estimation From Doppler Ultrasound Signals Using Swarm Decomposition

Saeed Alnuaimi, Shihab Jimaa, Yoshitaka Kimura, Georgios K. Apostolidis, Leontios J. Hadjileontiadis, Ahsan H. Khandoker
2019 Frontiers in Physiology  
differing age groups) which can later be used to estimate fetal cardiac intervals from a DUS signal.  ...  Pulsed Doppler images are used in order to verify the estimated timings. Three fetal age groups were assessed in terms of their cardiac intervals: 16-29, 30-35, and 36-41 weeks.  ...  ACKNOWLEDGMENTS We would like to thank the clinical support service team at the Tohoku University in Japan for the fetal Doppler data recordings.  ... 
doi:10.3389/fphys.2019.00789 pmid:31281265 pmcid:PMC6597894 fatcat:kifzpfqekvctbjigkelcwtwb4m

Gestation-specific reference intervals for fetal cardiac Doppler indices from 12 to 40 weeks of gestation

Rajeswari Parasuraman, Clive Osmond, David T. Howe
2013 Open Journal of Obstetrics and Gynecology  
We aimed to establish gestation age specific reference intervals for Doppler indices of fetal cardiac function from 12 to 40 weeks of pregnancy.  ...  Establishing gestation age specific ranges for various cardiac indices throughout pregnancy will help the study of development of fetal cardiac function.  ...  We estimated the gestational mean of a fetal Doppler measurement using a cubic polynomial in gestational age.  ... 
doi:10.4236/ojog.2013.31019 fatcat:f5f6ekhot5h4rar3475vhhnjdm

Development of Fetal Cardiac Intervals Throughout 16 to 41 Weeks of Gestation

Faezeh Marzbanrad, Yoshitaka Kimura, Kiyoe Funamoto, Rika Sugibayashi, Miyuki Endo, Takuya Ito, Marimuthu Palaniswami, Ahsan Khandoker
2013 International Conference on Computing in Cardiology  
This method provides automated beat by beat identification of cardiac valves' opening and closing which are used to estimate the fetal cardiac intervals.  ...  In this paper a new noninvasive method is proposed for automated estimation of fetal cardiac intervals from Doppler Ultrasound (DUS) signal and fetal electrocardiogram (fECG) as a reference.  ...  The cardiac intervals were estimated based on the fetal valve motions and they were found to be changing with the development of the fetus from early to late gestation.  ... 
dblp:conf/cinc/MarzbanradKFSEI13 fatcat:23bgpter55g5binfoofpdvgcka

Assessment of Fetal Development Using Cardiac Valve Intervals

Faezeh Marzbanrad, Ahsan H. Khandoker, Yoshitaka Kimura, Marimuthu Palaniswami, Gari D. Clifford
2017 Frontiers in Physiology  
This hypothesis was evaluated by modeling the fetal development using the cardiac intervals and validating against the gold standard gestational age identified by Crown-Rump Length (CRL).  ...  These intervals were estimated automatically from one-dimensional Doppler Ultrasound and noninvasive fECG. We hypothesize that the fetal growth can be estimated by the cardiac valve intervals.  ...  The authors would also like to thank the clinical support service team at Tohoku University for providing the fetal Doppler and fECG data.  ... 
doi:10.3389/fphys.2017.00313 pmid:28567021 pmcid:PMC5434138 fatcat:rm7igvwohnegta4mkklea26itm

Identification of Fetal Cardiac Timing Events by Swarm Decomposition of Doppler Cardiogram Signal

Saeed Alnuaimi, Shihab Jimaa, Yoshitaka Kimura, Georgios Apostolidis, Leontios Hadjileontiadis, Ahsan Khandoker
2018 2018 Computing in Cardiology Conference (CinC)  
In the early gestational age, the time intervals from R peak of fetal ECG to opening and closing of aortic valve were found to be 59.4±1.9 ms and 218.8±2.4 ms respectively and in the late gestational age  ...  Doppler ultrasound signals (DUS), which is commonly used for monitoring the fetal heart rate, can also be used for identifying the event timing of fetal cardiac valve motions.  ...  Also the authors would like to thank the clinical support service team at Tohoku University in Japan for fetal Doppler data recordings.  ... 
doi:10.22489/cinc.2018.310 dblp:conf/cinc/AlnuaimiJKAHK18 fatcat:44iyai6esbawvhcntb67e5kczi

Heart stroke volume and cardiac output by four-dimensional ultrasound in normal fetuses

F. S. Molina, C. Faro, A. Sotiriadis, T. Dagklis, K. H. Nicolaides
2008 Ultrasound in Obstetrics and Gynecology  
Objective To establish reference intervals for fetal heart stroke volume and cardiac output with gestation.  ...  Conclusions In normal fetuses the stroke volume and cardiac output increase between 12 and 34 weeks' gestation.  ...  ACKNOWLEDGMENT This study was supported by a grant from The Fetal Medicine Foundation (Charity No: 1037116).  ... 
doi:10.1002/uog.5374 pmid:18634132 fatcat:uoxxrd5tuvbg7iirf36ftqhx4q

Fetal Hemodynamic Adaptive Changes Related to Intrauterine Growth: The Generation R Study

B. O. Verburg, V. W.V. Jaddoe, J. W. Wladimiroff, A. Hofman, J. C.M. Witteman, E. A.P. Steegers
2008 Circulation  
The fetal circulation was examined in relation to estimated fetal weight. Higher placental resistance indices were strongly associated with decreased fetal growth.  ...  Cardiac remodeling and cardiac output changes are consistent with a gradual increase in afterload and compromised arterial compliance in conditions of decreased fetal growth.  ...  B, Mean cardiac performance measurements at the level of the atrioventricular valves with estimated fetal weight ranging from small (group 1) to large (group 10) for gestational age. tion to a higher afterload  ... 
doi:10.1161/circulationaha.107.709717 pmid:18212281 fatcat:6ffcwbxnvneqlb66fjy7bvdrqa

Fetal Cardiac Doppler Signal Processing Techniques: Challenges and Future Research Directions

Saeed Abdulrahman Alnuaimi, Shihab Jimaa, Ahsan H. Khandoker
2017 Frontiers in Bioengineering and Biotechnology  
The fetal cardiac intervals, which can be estimated by measuring the fetal cardiac event timings, are the most important markers of fetal development and well-being.  ...  The fetal Doppler Ultrasound (DUS) is commonly used for monitoring fetal heart rate and can also be used for identifying the event timings of fetal cardiac valve motions.  ...  The technique was used to analyze the changes in the fetal cardiac intervals for three fetal age groups: 16-29, 30-35, and 36-41 weeks.  ... 
doi:10.3389/fbioe.2017.00082 pmid:29312932 pmcid:PMC5743703 fatcat:xcwnnrseerbbthu7x4x3gjl2aq

Cardiac function in fetuses with intracardiac echogenic foci

S. Degani, Z. Leibovitz, I. Shapiro, R. Gonen, G. Ohel
2001 Ultrasound in Obstetrics and Gynecology  
Twodimensional and M-mode directed fetal echocardiography were used to exclude cardiac anomalies and measure right and left ventricular free walls and interventricular septal thickness and ventricular  ...  In the mitral valve the ratio was 0.37 ± 0.14 (0.039) (mean ± SD (95% confidence interval for difference between the means) ) vs. 0.59 ± 0.19 (0.052) and in the tricuspid valve it was 0.42 ± 0. 16 (0.045  ...  Two-dimensional fetal echocardiography was used to exclude a structural cardiac anomaly.  ... 
doi:10.1046/j.1469-0705.2001.00433.x pmid:11529992 fatcat:3vmmwrzegfbtznpw7qdpmktdsm

Nomograms of Fetal Cardiac Dimensions at 18–41 Weeks of Gestation

Laura García-Otero, Olga Gómez, Mérida Rodriguez-López, Ximena Torres, Iris Soveral, Álvaro Sepúlveda-Martínez, Laura Guirado, Brenda Valenzuela-Alcaraz, Marta López, Josep Maria Martínez, Eduard Gratacós, Fàtima Crispi
2019 Fetal Diagnosis and Therapy  
Parametric regressions were tested to model each measurement against gestational age from 18 to 41 weeks of gestation.  ...  The objective of the present study was to construct nomograms for fetal cardiac dimensions using a well-defined echocardiographic methodology in a low-risk population.  ...  Interobserver reproductibility was estimated in 45 cases (15 cases per 162 gestational age in the following intervals: 18-25; 26-33 and 34-41 weeks of gestational 163 age).  ... 
doi:10.1159/000494838 pmid:30612128 fatcat:nr76zv3nyzd5fdmttx7m62wxsy

Assessment of Left Ventricular Pre-Ejection Period in the Fetus Using Simultaneous Magnetocardiography and Echocardiography

Nana Aba Mensah-Brown, Ronald T. Wakai, Bageshree Cheulkar, Shardha Srinivasan, Janette F. Strasburger
2010 Fetal Diagnosis and Therapy  
Valve clicks, therefore, may provide more precise estimates of mechanical, as well as electromechanical, intervals.  ...  RR (ms). c QRS (ms) vs. gestational age (weeks). d RR (ms) vs. gestational age (weeks) in 41 sessions of normal human fetuses.  ... 
doi:10.1159/000318345 pmid:20975278 pmcid:PMC2992646 fatcat:mqtvupgj5rdexn2tkdqq7iwdli

Reference values for variables of fetal cardiocirculatory dynamics at 11-14 weeks of gestation

W. Rozmus-Warcholinska, A. Wloch, G. Acharya, W. Cnota, B. Czuba, K. Sodowski, V. Skrzypulec
2010 Ultrasound in Obstetrics and Gynecology  
Global cardiac function was evaluated using the heart : chest area ratio and Tei index of the left (LV) and right (RV) ventricles.  ...  The parameters of normal cardiac function at 11-14 weeks' gestation are not well defined and appropriate reference values have not yet been established.  ...  Valve clicks were used to identify the closure and opening of the atrioventricular and semilunar valves while measuring the time intervals 18 .  ... 
doi:10.1002/uog.7595 pmid:20178107 fatcat:hq7qa7lv5nhr3bp2mxi7owm32y

Evolução e prognóstico materno-fetal da cirurgia cardíaca durante a gravidez

Walkiria Samuel Ávila, Ana Maria Milani Gouveia, Pablo Pomerantzeff, Maria Rita Lemos Bortolotto, Max Grinberg, Noedir Stolf, Marcelo Zugaib
2009 Arquivos Brasileiros de Cardiologia  
Fetal cardiotocography was performed throughout the procedure in patients with gestational age above 20 weeks.  ...  Results: Mean maternal age was 27.8 ± 7.6 years; there was a predominance of patients with rheumatic valve disease (87.8%), of whom 5 (4.6%) underwent reoperation due to prosthetic valve dysfunction.  ...  arrhythmia; 2 -Odds ratio estimate; 3 -Confidence interval obtained using the Wolf method; 4 -Fetal loss, stillbirth and neonatal death.  ... 
doi:10.1590/s0066-782x2009000700003 pmid:19838464 fatcat:iseu7k7tofe3degcselk7tiscq

Time interval analysis of ductus venosus and cardiac cycles in relation with umbilical artery pH at birth in fetal growth restriction

Tomoki Suekane, Daisuke Tachibana, Yasushi Kurihara, Natsuko Yokoi, Naomi Seo, Kohei Kitada, Mie Tahara, Akihiro Hamuro, Takuya Misugi, Akemi Nakano, Masayasu Koyama
2021 BMC Pregnancy and Childbirth  
FGR was defined as an estimated fetal weight below − 2.0 S.D. with an elevated UA-PI.  ...  Background The aims of this study were to evaluate the time intervals of flow velocity waveforms (FVW) of ductus venosus (DV) and cardiac cycles, as well as the pulsatility index of DV-FVW (DV-PI), in  ...  The last menstrual period was applied for the calculation of gestational age and the measurement of a crown-rump length at 9-11 weeks' gestation was used for confirmation of gestational age.  ... 
doi:10.1186/s12884-021-04115-7 pmid:34602049 fatcat:dt5n6mf6t5aalgbxfr7n33doem
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