scholarly journals Fetal Dual Doppler Echocardiography

2014 ◽  
Vol 8 (4) ◽  
pp. 376-381
Author(s):  
Takashi Kaji ◽  
Kazuhisa Maeda ◽  
Atsuko Hichijo ◽  
Yohei Takahashi ◽  
Soichiro Nakayama ◽  
...  
Keyword(s):  
Doppler Echocardiography ◽  
Cardiac Rhythm ◽  
Simultaneous Recording ◽  
Image Resolution ◽  
Descending Aorta ◽  
Doppler Signals ◽  
Precise Diagnosis ◽  
Pulsed Wave Doppler ◽  
A New Technique ◽  
Fetal Position

ABSTRACT Dual Doppler echocardiography is a recently developed technique performed using an instrument with two separate sample gates, allowing simultaneous recording of signals from two locations. We describe the use of dual Doppler echocardiography to assess fetal cardiac rhythm. Fetal arrhythmias are common and encountered in 1 to 2% pregnancies. They often resolve spontaneously and do not require treatment, but sometimes lead to severe morbidity and mortality. Fetal arrhythmias are responsive to fetal therapy and require appropriate management through accurate diagnosis. Pulsed wave Doppler and M-mode echocardiography are widely used to assess fetal cardiac rhythm. Both methods have advantages and limitations, which are influenced by fetal position, image resolution, and the complexity of the arrhythmia. We developed a new technique that records pulsed wave Doppler signals in the hepatic vein (HV) and the descending aorta (DAo) simultaneously using dual Doppler. This method is less influenced by fetal position and the complexity of the arrhythmia, and the images have better resolution than those acquired using conventional Doppler methods in most cases. Although, electrical parameters, such as the QT interval cannot be evaluated, dual Doppler recording of flows in HV and DAo is an efficient and effective method for assessing fetal cardiac rhythms, allowing precise diagnosis of cardiac arrhythmias. How to cite this article Kaji T, Maeda K, Hichijo A, Takahashi Y, Nakayama S, Irahara M. Fetal Dual Doppler Echocardiography. Donald School J Ultrasound Obstet Gynecol 2014; 8(4):376-381.

Abstract 12320: Assessment of Post-Procedural Aortic Regurgitation After Transcatheter Aortic Valve Replacement During the Procedure: An Intraprocedural Transesophageal Echocardiography Study

Circulation ◽  
2014 ◽  
Vol 130 (suppl_2) ◽  
Author(s):  
Hirotsugu Mihara ◽  
Kentaro Shibayama ◽  
Hasan Jilaihawi ◽  
Yuji Itabashi ◽  
Javier Berdejo ◽  
...  
Keyword(s):  
Aortic Valve ◽  
Aortic Valve Replacement ◽  
Transesophageal Echocardiography ◽  
Aortic Regurgitation ◽  
Valve Replacement ◽  
Transcatheter Aortic Valve Replacement ◽  
Color Doppler ◽  
Descending Aorta ◽  
Transcatheter Aortic Valve ◽  
Pulsed Wave Doppler

Introduction: The assessment of post-procedual aortic regurgitation (PAR) after transcatheter aortic valve replacement (TAVR) has not been validated. The purpose of this study was (1) to investigate the value of holodiastolic flow reversal (HDFR) in the descending aorta in patients with PAR after TAVR and (2) to determine which color Doppler parameters are useful for PAR grading using the intraprocedural transesophageal echocardiography (iTEE). Hypothesis: We hypothesized that HDFR in the descending aorta and any color Doppler parameters can delineate significant PAR after TAVR. Methods: Three hundred-eighty patients with severe aortic stenosis underwent TAVR with the Edwards SAPIEN valve with 131 pulsed-wave Doppler tracings from the descending aorta had assessed by iTEE. PAR was evaluated using 2D color Doppler by the cross-sectional area of the vena contracta (VCA) at the aortic annular plane, and by the longitudinal jet extent (mosaic signals, Figure A) compared to the location of the tip of the anterior mitral leaflet (AML). Significant PAR was defined as VCA of ≥10 mm2, corresponding to greater than a moderate grade. Results: In patients with any grade of PAR, pulsed-wave Doppler tracing from the descending aorta, jet extent and VCA were obtained in 100%, 80%, and 74%, respectively. All patients with consistent HDFR had significant PAR. By multivariate analysis, a consistent HDFR and jet extent beyond the tip of AML were independent predictors of significant PAR. A consistent HDFR and jet extent beyond the tip of AML predicted significant PAR with specificity of 100% and 97%, respectively. In the other hand, patients with both negative HDFR and jet extent of less than halfway to the tip of AML had no significant PAR with a 97% specificity. Conclusions: The presence of HDFR with each cardiac cycle and jet extent beyond the tip of AML are indicative of significant PAR.

Studies on Pulsed-wave Doppler Echocardiographic Parameters of Blood Flow through Mitral, Tricuspid and Aortic Valves in Healthy Indian Spitz Dogs

2021 ◽  
Author(s):  
Deepti Bodh ◽  
Mozammel Hoque ◽  
Abhishek Chandra Saxena
Keyword(s):  
Blood Flow ◽  
Wave Velocity ◽  
Doppler Echocardiography ◽  
Aortic Valves ◽  
Velocity Time Integral ◽  
Wave Velocities ◽  
Time Integral ◽  
Pulsed Wave Doppler ◽  
Flow Through ◽  
Isovolumic Relaxation

Background: Pulsed-wave Doppler measures blood flow at specific point and provides information on velocity, direction and uniformity of blood flow throughout cardiac cycle. Till date, there is no published data on study of cardiac parameters using pulsed-wave Doppler echocardiography in Indian Spitz dogs.Methods: Twenty-four clinically normal Indian Spitz dogs were subjected to pulsed-wave Doppler echocardiography to determine the reference intervals for Doppler parameters of blood flow through mitral, tricuspid and aortic valves. Mitral peak E and A-wave velocities, E/A ratio, deceleration time, isovolumic relaxation time, E and A-wave velocity time integral, E duration and A duration were 0.69±0.09 m/s, 0.43±0.12 m/s, 1.69±0.45, 111.25±35.94 ms, 48.50±24.77 ms, 0.07±0.01 m and 0.04±0.02 m, 196.88±44.38 ms and 181.25±64.89 ms, respectively. Tricuspid peak E and A-wave velocities, E/A ratio and E and A-wave velocity time integral were 0.57±0.11 m/s, 0.38±0.08 m/s, 1.56±0.32 and 0.07±0.02 m and 0.05±0.01 m, respectively. Aortic peak velocity, velocity time integral and ejection time were 0.87±0.07 m/s, 0.11±0.02 m and 0.25±0.04 s, respectively. Conclusion: The reference values of flow parameters across mitral, tricuspid and aortic valves using pulsed-wave Doppler echocardiography were determined. Mitral, tricuspid and aortic valve flow variables were unaffected by gender whereas isovolumic relaxation correlated positively with body weight.

Pulsed wave Doppler echocardiography in normal horses

2010 ◽  
Vol 27 (S19) ◽  
pp. 38-46 ◽  
Author(s):  
KAREN J. BLISSITT ◽  
J. D. BONAGURA
Keyword(s):  
Doppler Echocardiography ◽  
Pulsed Wave Doppler

Assessment of Diastolic Function

2016 ◽  
Author(s):  
Patrizio Lancellotti ◽  
Bernard Cosyns
Keyword(s):  
Ejection Fraction ◽  
Diastolic Function ◽  
Doppler Echocardiography ◽  
Integrated Approach ◽  
Tissue Doppler ◽  
Left Ventricular ◽  
Left Ventricular Filling ◽  
Valve Closure ◽  
Pulsed Wave Doppler ◽  
Ventricular Filling

Diastole is the part of the cardiac cycle starting at aortic valve closure and ending at mitral valve closure. Evaluation of diastolic function by echocardiography is useful to diagnose heart failure with preserved ejection fraction, and regardless of ejection fraction, echocardiography can be used to estimate left ventricular filling pressure. Assessment of diastolic function includes analysis of left ventricular relaxation and compliance, left atrial and left ventricular filling pressures. This chapter describes the phases of diastole and covers the integrated approach of LV diastolic function through M-Mode and 2D/3D echocardiography, pulsed-wave Doppler echocardiography, and pulsed-wave tissue Doppler echocardiography.

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