scholarly journals P21.06: Ductus venosus Doppler flow velocity after transplacental and non-transplasental amniocentesis during midtrimester

2014 ◽  
Vol 44 (S1) ◽  
pp. 311-311
Author(s):  
B. Artunc Ulkumen ◽  
H. Pala ◽  
Y. Bulbul Baytur ◽  
F. Koyuncu
Keyword(s):  
Flow Velocity ◽  
Ductus Venosus ◽  
Doppler Flow

scholarly journals Ductus Venosus Doppler Flow Velocity after Transplacental and Non-transplacental Amniocentesis during Midtrimester

1969 ◽  
Vol 30 (5) ◽  
Author(s):  
Burcu Artunc Ulkumen ◽  
Halil Gursoy Pala ◽  
Yesim Bulbul Baytur ◽  
Faik Mumtaz Koyuncu
Keyword(s):  
Flow Velocity ◽  
Ductus Venosus ◽  
Doppler Flow

Normalization of a severely abnormal ductus venosus Doppler flow velocity waveform in the presence of normal arterial flow parameters

2005 ◽  
Vol 33 (1) ◽  
Author(s):  
Andrea Sütterlin ◽  
Marc Sütterlin ◽  
Ralph Nanan ◽  
Andrea Baumann-Müller ◽  
Johannes Dietl ◽  
...  
Keyword(s):  
Flow Velocity ◽  
Arterial Flow ◽  
Ductus Venosus ◽  
Doppler Flow ◽  
Velocity Waveform ◽  
Flow Parameters ◽  
Flow Velocity Waveform

Pulsed Doppler flow-velocity waveforms in the prediction of fetal hematocrit of the severely isoimmunized pregnancy

1989 ◽  
Vol 161 (2) ◽  
pp. 341-344 ◽  
Author(s):  
Joshua A. Copel ◽  
Peter A. Grannum ◽  
Jacqueline J. Green ◽  
Kathy Belanger ◽  
John C. Hobbins
Keyword(s):  
Flow Velocity ◽  
Pulsed Doppler ◽  
Doppler Flow

Ductus venosus flow velocity waveforms in relation to fetal behavioural states

1994 ◽  
Vol 101 (3) ◽  
pp. 220-224 ◽  
Author(s):  
Tjeerd W. A. Huisman ◽  
Christoph Brezinka ◽  
Patricia A. Stewart ◽  
Theo Stijnen ◽  
Juriy W. Wladimiroff
Keyword(s):  
Flow Velocity ◽  
Ductus Venosus

scholarly journals Doppler Flow Velocity Indices (RI, PI, S/D & PSV) of Fetal Middle Cerebral Artery in Normal Pregnancies: Correlation with Gestational Age of 20 to 40 Weeks

2012 ◽  
Vol 2 (2) ◽  
pp. 77-80
Author(s):  
Md Abu Taher ◽  
Nuzhat Tasmin ◽  
AS Mohiuddin ◽  
Md Mohit Ul Alam ◽  
Md Mofazzal Sharif ◽  
...  
Keyword(s):  
Middle Cerebral Artery ◽  
Flow Velocity ◽  
Cerebral Artery ◽  
Gestational Age ◽  
Resistance Index ◽  
Peak Systolic Velocity ◽  
Doppler Flow ◽  
Significant Difference ◽  
Before And After ◽  
Doppler Indices

This observational type of descriptive study was carried out in the Department of Radiology and Imaging, BIRDEM selecting 70 Bangladeshi pregnant babies with the aim to find out the normogram of foetal middle cerebral artery Doppler flow velocity indices and correlation between Doppler flow velocity indices [Resistance Index (RI), Pulsatility Index (PI), Systolic/Diastolic ratio (S/D) & Peak Systolic Velocity (PSV)] of foetal middle cerebral artery and gestational age in normal pregnancies of 20 to 40 weeks. It was observed that RI, PI and S/D were decreased with the advance of gestational age but PSV was increases with the advance of gestational age. Statistical analyses showed there were significant difference between mean PSV, RI and PI before and after 25 weeks of gestation. No significant difference was found between mean S/D before and after 25 weeks of gestation. It was observed from Correlation analysis between Doppler indices with independent gestational age that all the Doppler indices of foetal middle cerebra artery was positively correlated with the whole gestation period. The statistical analysis showed only PSV and RI were significantly correlated with the gestational age. Simple regression analysis between dependent Doppler index with independent gestational age before and after 25 weeks revealed that all the Doppler indices had positive relationship with the corresponding gestational age but relationship between PSV and PI (before 25 weeks) with their corresponding gestational ages were only statistically significant.DOI: http://dx.doi.org/10.3329/birdem.v2i2.12306 Birdem Med J 2012; 2(2) 77-80

Reference ranges for time-related analysis of ductus venosus flow velocity waveforms in singleton pregnancies

2012 ◽  
Vol 32 (8) ◽  
pp. 803-809 ◽  
Author(s):  
Kayoko Nakagawa ◽  
Daisuke Tachibana ◽  
Hiroyuki Nobeyama ◽  
Mitsuru Fukui ◽  
Toshiyuki Sumi ◽  
...  
Keyword(s):  
Flow Velocity ◽  
Ductus Venosus ◽  
Reference Ranges ◽  
Singleton Pregnancies

scholarly journals The Association Between Notching of the Right Ventricular Outflow Tract Flow Velocity Doppler Envelope and Impaired Right Ventricular Function After Acute High-Altitude Exposure

2021 ◽  
Vol 12 ◽  
Author(s):  
Fangzhengyuan Yuan ◽  
Chuan Liu ◽  
Shiyong Yu ◽  
Shizhu Bian ◽  
Jie Yang ◽  
...  
Keyword(s):  
Pulmonary Artery ◽  
Right Ventricular ◽  
Flow Velocity ◽  
Healthy Subjects ◽  
Right Ventricular Outflow Tract ◽  
Ventricular Outflow Tract ◽  
Tricuspid Annulus ◽  
Doppler Flow ◽  
The Right ◽  
Rv Function

IntroductionPulmonary artery pressure (PAP) is increased and right ventricular (RV) function is well preserved in healthy subjects upon exposure to high altitude (HA). An increase in PAP may trigger notching of the right ventricular outflow tract Doppler flow velocity envelope (RVOT notch), which is associated with impaired RV function in patients with pulmonary hypertension. However, whether HA exposure can induce RVOT notch formation and the subsequent impact on cardiac function in healthy subjects remains unclear.MethodsA total of 99 subjects (69 males and 30 females) with a median age of 25 years were enrolled in this study; they traveled from 500 to 4100 m by bus over a 2-day period. All subjects underwent a comprehensive physiological and echocardiographic examination 1 day before ascension at low altitude and 15 ± 3 h after arrival at HA. The RVOT notch was determined by the presence of a notched shape in the RVOT Doppler flow velocity envelope. The systolic PAP (SPAP) was calculated as Bernoulli equation SPAP = 4 × (maximum tricuspid regurgitation velocity)2+5 and mean PAP (mPAP) = 0.61 × SPAP+2. Cardiac output was calculated as stroke volume × heart rate. Pulmonary capillary wedge pressure (PCWP) was calculated as 1.9+1.24 × mitral E/e’. Pulmonary vascular resistance (PVR) was calculated as (mPAP-PCWP)/CO.ResultsAfter HA exposure, 20 (20.2%) subjects had an RVOT notch [notch (+)], and 79 (79.8%) subjects did not have an RVOT notch [notch (−)]. In the multivariate logistic regression analysis, the SPAP, right ventricular global longitude strain (RV GLS), and tricuspid E/A were independently associated with the RVOT notch. The SPAP, mPAP, PVR, standard deviations of the times to peak systolic strain in the four mid-basal RV segments (RVSD4), peak velocity of the isovolumic contraction period (ICV), and the peak systolic velocity (s’) at the mitral/tricuspid annulus were increased in all subjects. Conversely, the pulse oxygen saturation (SpO2), RV GLS, and tricuspid annulus plane systolic excursion (TAPSE)/SPAP were decreased. However, the increases of SPAP, mPAP, PVR, and RVSD4 and the decreases of SpO2, RV GLS, and TAPSE/SPAP were more pronounced in the notch (+) group than in the notch (−) group. Additionally, increased tricuspid ICV and mitral/tricuspid s’ were found only in the notch (−) group.ConclusionHA exposure-induced RVOT notch formation is associated with impaired RV function, including no increase in the tricuspid ICV or s’, reduction of RV deformation, deterioration in RV-pulmonary artery coupling, and RV intraventricular synchrony.

scholarly journals Changes of the Carotid Artery Doppler Flow Velocity Pattern after Sublingual Nitroglycerin in Patients with Hypertension

1998 ◽  
Vol 13 (1) ◽  
pp. 22-26
Author(s):  
Jin Won Jeong ◽  
Ock Kyu Park ◽  
Yang Kyu Park ◽  
Chuwa Tei ◽  
Nobuyuki Tanaka
Keyword(s):  
Carotid Artery ◽  
Flow Velocity ◽  
Sublingual Nitroglycerin ◽  
Doppler Flow ◽  
Velocity Pattern
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