Resistance Training Does Not Decrease Placental Blood Flow During Valsalva Maneuver: A Novel Use of 3D Doppler Power Flow Ultrasonography

2021 ◽  
pp. 194173812110007
Author(s):  
Sara Gould ◽  
Chase Cawyer ◽  
Louis Dell’Italia ◽  
Lorie Harper ◽  
Gerald McGwin ◽  
...  
Keyword(s):  
Blood Flow ◽  
Resistance Training ◽  
Power Flow ◽  
Valsalva Maneuver ◽  
Three Dimensional ◽  
Doppler Imaging ◽  
Flow Index ◽  
Placental Perfusion ◽  
Placental Blood ◽  
Placental Blood Flow

Background: The Valsalva maneuver may increase maternal blood pressure and intra-abdominal pressure, resulting in decreased blood flow to the fetus during resistance training. Hypothesis: There is no significant reduction in placental blood flow in pregnancy during resistance training in recreational athletes, as documented by a 3-dimensional power flow Doppler ultrasonography. Study Design: Cohort. Level of Evidence: Level 3. Methods: A cohort of healthy women who participated in recreational athletics was enrolled in a prospective study to assess placental blood flow during a resistance exercise. A 1 repetition maximum (1RM, up to 50 lb) was determined through a modified chest press as a marker of heavy resistance training. Three-dimensional volume measurements and power Doppler flow were determined at the rest phase and during the 1RM lift phase. The vascular flow index (VFI) was calculated to determine placental perfusion during each phase. Results: A total of 22 women participated. The mean age of participants was 31 years. Gestational age ranged from 13 to 28 weeks. Average 1RM weight lifted was 30 lb. Four women (18%) were able to lift 50 lb, the maximum weight that the study allowed. The remaining 18 women (82%) lifted their true 1RM. Mean VFI during lift phase was 2.185 compared with 2.071 at rest ( P = 0.03). There was a slight mean increase in VFI during lift phase, 0.114 (95% CI 0.009-0.182) from 2.071 to 2.185 with lifting ( P = 0.03). The 15 women who participated in structured exercise had a mean VFI at rest and during the lift phase of 2.031 and 2.203, respectively ( P = 0.01). Conclusion: Three-dimensional power flow Doppler imaging can guide resistance training during pregnancy to prevent fetal injury due to hypoperfusion. Resistance training up to an RM1 of 50 lb did not result in a significant reduction of placental blood flow from resting state in the study population. Clinical Relevance: This technique may be used to guide training parameters among pregnant athletes.

scholarly journals Human placental perfusion measured using dynamic contrast enhancement MRI

PLoS ONE ◽  
2021 ◽  
Vol 16 (9) ◽  
pp. e0256769
Author(s):  
Benjamin Deloison ◽  
Chloé Arthuis ◽  
Gabriel Benchimol ◽  
Daniel Balvay ◽  
Laurence Bussieres ◽  
...  
Keyword(s):  
Blood Flow ◽  
Dynamic Mri ◽  
Future Research ◽  
Dynamic Contrast Enhancement ◽  
Placental Perfusion ◽  
Dce Mri ◽  
Gadolinium Chelate ◽  
Placental Blood ◽  
Placental Blood Flow

Objectives To evaluate the feasibility of dynamic contrast enhanced magnetic resonance imaging (DCE MRI) and measure values of in vivo placental perfusion in women. Methods This study was part of the Placentimage trial (NCT01092949). Gadolinium-chelate (Gd) enhanced dynamic MRI was performed two days before termination of pregnancies at 16 to 34 weeks gestational age (GA). Quantitative analysis was performed using one-compartment intravascular modeling. DCE perfusion parameters were analyzed across GA and were compared in IUGR and AGA fetuses. Results 134 patients were enrolled. After quality control check, 62 DCE MRI were analyzed including 48 and 14 pregnancies with normal and abnormal karyotypes, respectively. Mean placental blood flow was 129±61 mL/min/100ml in cases with normal karyotypes. Fetuses affected by IUGR (n = 13) showed significantly lower total placental blood flow values than AGA fetuses (n = 35) (F total = 122±88 mL/min versus 259±34 mL/min, p = 0.002). DCE perfusion parameters showed a linear correlation with GA. Conclusions Measuring placental perfusion in vivo is possible using DCE MRI. Although this study has many limitations it gives us the first DCE MRI values that provide a potential standard for future research into placental perfusion methods and suggests that placental functional parameters are altered in IUGR pregnancies.

scholarly journals 3D Doppler imaging of placental blood flow in prediction of fetal

2013 ◽  
Vol 62 (2) ◽  
pp. 160-165
Author(s):  
Marina Petrovna Fomina
Keyword(s):  
Blood Flow ◽  
Power Doppler ◽  
Doppler Imaging ◽  
Fetal Growth Retardation ◽  
Placental Dysfunction ◽  
3D Power Doppler ◽  
Placental Blood ◽  
Diagnostic Criterion ◽  
Placental Blood Flow ◽  
Singleton Pregnancies

Placental blood flow was studied in 103 women with singleton pregnancies at 7–15 weeks of gestation by 3D power Doppler. Reduced placental vasculature was revealed using 3D power Doppler at 7–15 weeks of gestation and it was defined as a diagnostic criterion of placental dysfunction and prognostic marker of fetal growth retardation.

Placental Blood Flow by Three-dimensional Doppler Ultrasound

2016 ◽  
Vol 10 (1) ◽  
pp. 55-62 ◽  
Author(s):  
Ivica Zalud
Keyword(s):  
Blood Flow ◽  
Doppler Ultrasound ◽  
Color Doppler ◽  
Rapid Development ◽  
Three Dimensional ◽  
Color Doppler Ultrasound ◽  
Clinical Applications ◽  
Ultrasound Technique ◽  
Placental Blood ◽  
Placental Blood Flow

ABSTRACT This review aims to provide the reader with an overview of the potential clinical applications in three-dimensional (3D) Doppler ultrasound for the evaluation of vascularity and blood flow within the placenta. Significant innovations have recently occurred, improving the visualization and evaluation of placental vascularity, resulting from enhancements in delineation of tissue detail through electronic compounding and harmonics, as well as enhancements in signal processing of frequencyand/ or amplitude-based color Doppler ultrasound. Spatial representation of vascularity can be improved by utilizing 3D processing. Greater sensitivity of 3D Doppler ultrasound to macro- and microvascular flow has provided improved anatomical and physiologic assessment throughout pregnancy. The rapid development of these new sonographic techniques will continue to enlarge the scope of clinical applications in placental studies. Three-dimensional Doppler sonography is a unique ultrasound technique that enables assessment of vascular signals within the whole investigated area. Homodynamic changes included in the process of placentation are one of the most exciting topics in the investigation of early human development. How to cite this article Zalud I. Placental Blood Flow by Threedimensional Doppler Ultrasound. Donald School J Ultrasound Obstet Gynecol 2016;10(1):55-62.

Placental blood flow measured by three-dimensional power Doppler ultrasound at 26 to 35 weeks gestation in normal pregnancies

2009 ◽  
Vol 23 (1) ◽  
pp. 69-73 ◽  
Author(s):  
Hélio Antonio Guimarães Filho ◽  
Edward Araujo Júnior ◽  
Rosiane Mattar ◽  
Lavoisier Linhares Dias Da Costa ◽  
Carlos Fernando de Mello Júnior ◽  
...  
Keyword(s):  
Blood Flow ◽  
Doppler Ultrasound ◽  
Power Doppler ◽  
Three Dimensional ◽  
Power Doppler Ultrasound ◽  
Placental Blood ◽  
Placental Blood Flow
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