(pulsed wave Doppler ultrasound pulsed Doppler ultrasound) articles in PubMed
- Myocardial Function Pre- and Post-Fetal Endoscopic Tracheal Occlusion (FETO) in Fetuses with Left-Sided Moderate to Severe Congenital Diaphragmatic Hernia. [Journal Article]
- Ultraschall Med 2016 Sep 14UM
- Purpose: To evaluate pre- and postprocedural myocardial function in fetuses with moderate to severe congenital diaphragmatic hernia (CDH) who underwent FETO to improve survival and to reduce morbidit...
Purpose: To evaluate pre- and postprocedural myocardial function in fetuses with moderate to severe congenital diaphragmatic hernia (CDH) who underwent FETO to improve survival and to reduce morbidity and to compare these data with fetuses and CDH not undergoing FETO and normal controls. Materials and Methods: 8 fetuses with isolated left-sided CDH were included and underwent FETO at our center between 2012 and 2013. Prior to and after the operation, myocardial function was assessed by measuring the mitral annular plane systolic excursion (MAPSE), the tricuspid annular plane systolic excursion (TAPSE), Tei index, isovolumetric contraction time (ICT), ejection time (ET), isovolumetric relaxation time (IRT) for the left ventricle in PW Doppler ultrasound as well as ICT, ET, IRT and Tei index in pulsed wave tissue Doppler imaging (PW-TDI) for the left and right ventricle. The E-, A-, E'- and A'-wave peak velocity and the systolic downward motion (S') were measured for both ventricles and the E/A, E/E' and E'/A' ratios were calculated. Results: were compared to fetuses with CDH not undergoing FETO and to gestational age-matched healthy controls.
- Magnetic Nanoparticle-Mediated Targeting of Cell Therapy Reduces In-Stent Stenosis in Injured Arteries. [Journal Article]
- ACS Nano 2016 Sep 19AN
- Although drug-eluting stents have dramatically reduced the recurrence of restenosis after vascular interventions, the nonselective antiproliferative drugs released from these devices significantly de...
Although drug-eluting stents have dramatically reduced the recurrence of restenosis after vascular interventions, the nonselective antiproliferative drugs released from these devices significantly delay reendothelialization and vascular healing, increasing the risk of short- and long-term stent failure. Efficient repopulation of endothelial cells in the vessel wall following injury may limit complications, such as thrombosis, neoatherosclerosis, and restenosis, through reconstitution of a luminal barrier and cellular secretion of paracrine factors. We assessed the potential of magnetically mediated delivery of endothelial cells (ECs) to inhibit in-stent stenosis induced by mechanical injury in a rat carotid artery stent angioplasty model. ECs loaded with biodegradable superparamagnetic nanoparticles (MNPs) were administered at the distal end of the stented artery and localized to the stent using a brief exposure to a uniform magnetic field. After two months, magnetic localization of ECs demonstrated significant protection from stenosis at the distal part of the stent in the cell therapy group compared to both the proximal part of stent in the cell therapy group and the control (stented, nontreated) group: 1.7-fold (p < 0.001) less reduction in lumen diameter as measured by B-mode and color Doppler ultrasound, 2.3-fold (p < 0.001) less reduction in the ratios of peak systolic velocities as measured by pulsed wave Doppler ultrasound, and 2.1-fold (p < 0.001) attenuation of stenosis as determined through end point morphometric analysis. The study thus demonstrates that magnetically assisted delivery of ECs is a promising strategy for prevention of vessel lumen narrowing after stent angioplasty procedure.
- The Inter-rater Reliability of Echocardiographic Diastolic Function Evaluation Among Emergency Physician Sonographers. [Journal Article]
- J Emerg Med 2016 Sep 7JE
- CONCLUSIONS: EP sonographers obtained similar Doppler measurements for diastolic function evaluation with very good inter-rater reliability for the assessment of overall diastolic function.
- Effects of intravenous bolus injection of nicorandil on renal artery flow velocity assessed by color Doppler ultrasound. [Journal Article]
- J Cardiol 2016 Sep 6JC
- CONCLUSIONS: Intravenous nicorandil increased renal artery blood flow velocity in comparison with nitroglycerin. Nicorandil has a significant effect on renal hemodynamics.
- Measured acoustic intensities for clinical diagnostic ultrasound transducers and correlation to the Thermal Index. [Journal Article]
- Ultrasound Obstet Gynecol 2016 Sep 8UO
- CONCLUSIONS: The TIB is a poor predictor for spatial-peak temporal-average intensity, spatial-peak pulse-average acoustic intensity and potential bioeffects from clinical diagnostic ultrasound scanners.
- [EVALUATION OF ARTERIAL STIFFNESS AND POSSIBILITY TO PREDICT CAROTID ATHEROSCLEROSIS IN PATIENTS WITH ESSENTIAL HYPERTENSION BASED ON AN OUTPATIENT FACILITY]. [Journal Article]
- Klin Med (Mosk) 2016; 94(3):211-7KM
- To estimate the possibility of predicting the presence and severity of coronary atherosclerosis from arterial stiffness characteristics and augmentation index (AIx) in patients with essential hyperte...
To estimate the possibility of predicting the presence and severity of coronary atherosclerosis from arterial stiffness characteristics and augmentation index (AIx) in patients with essential hypertension (EH) obtained under outpatient conditions.
- Pulsed-wave Doppler ultrasonographic evaluation of hepatic vein in dogs with tricuspid regurgitation. [Journal Article]
- J Vet Sci 2016 Aug 10JV
- This study was performed to identify the relationship between the hepatic vein (HV) measurements, including flow velocity and waveform, performed with pulsed-wave (PW) Doppler ultrasonography and sev...
This study was performed to identify the relationship between the hepatic vein (HV) measurements, including flow velocity and waveform, performed with pulsed-wave (PW) Doppler ultrasonography and severity of tricuspid regurgitation (TR) in dogs. The study included 22 dogs with TR and 7 healthy dogs. The TR group was subdivided into 3 groups according to the TR jet profile in echocardiographic examination. The hepatic venous waveform was obtained and classified into 3 types. The measurements of HV, including the maximal velocities of the atrial systolic (A), systolic (S), end ventricular systolic (V), and diastolic (D) waves and the ratio of the S- and D- wave velocities (S:D ratio), were acquired. TR severity was significantly correlated with the S- (r= -0.380, p= 0.042), D- (r = 0.468, p = 0.011) wave velocities, and S:D ratio (r= -0.747, p< 0.001). In receiver operating characteristic curve analysis, the highest sensitivity and specificity were found for the S:D ratio (89% and 75%, respectively) at a threshold of 0.97, with excellent accuracy (AUC= 0.911, p< 0.001). In conclusion, PW Doppler ultrasonographic examination of the HV can be used for identifying the presence of clinically significant TR and classifying TR severity in dogs.
- Vein of Galen Aneurysmal malformation (VGAM) in the fetus. A retrospective analysis of perinatal prognostic indicators in a two-center series of 49 cases. [Journal Article]
- Ultrasound Obstet Gynecol 2016 Aug 12UO
- CONCLUSIONS: Major brain lesions, tricuspid regurgitation and, to a lesser extent an MRV ≥ 20000 mm3 are the only prenatal variables associated with poor outcome in fetal VGAM. Prenatal multidisciplinary counselling should be based on the results of these variables.
- Tissue Doppler Imaging and Intima-Media Thickness as Noninvasive Methods of Cardiovascular Risk Stratification in Patients After Kidney Transplantation. [Journal Article]
- Transplant Proc 2016; 48(5):1535-8TP
- CONCLUSIONS: Echocardiography with TDI provided more accurate information about systolic and diastolic LV function. KT recipients showed significant alterations in LV longitudinal myocardial function parameters estimated by strain and strain rate. Strain and strain rate are noninvasive methods, easy to repeat, and valuable for detecting myocardial LV dysfunction in asymptomatic KT recipients.
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- Left ventricular diastolic dysfunction--an independent risk factor for weaning failure from mechanical ventilation. [Journal Article]
- Anaesth Intensive Care 2016; 44(4):466-73AI
- The objective of this study was to investigate the contribution of left ventricular (LV) diastolic dysfunction to weaning failure, along with the levels of the currently used cardiac biomarkers. Fort...
The objective of this study was to investigate the contribution of left ventricular (LV) diastolic dysfunction to weaning failure, along with the levels of the currently used cardiac biomarkers. Forty-two mechanically ventilated patients, who fulfilled criteria for weaning from mechanical ventilation (MV), underwent a two-hour spontaneous breathing trial (SBT). Transthoracic echocardiography (TTE) was performed before the start of the SBT. The grade of LV diastolic dysfunction was assessed by pulsed-wave Doppler and tissue Doppler imaging at the level of the mitral valve. Haemodynamic and respiratory parameters were recorded. Blood levels of B-type natriuretic peptide (BNP), troponin I, creatine kinase-MB, and myoglobin were measured on MV and at the end of the SBT. Weaning success was defined as the patient's ability to tolerate spontaneous breathing for more than 48 hours. Fifteen patients failed to wean. LV diastolic dysfunction was significantly associated with weaning failure (P<0.001). The grade of diastolic dysfunction was significantly correlated with BNP levels both on MV and at the end of the SBT (P<0.001, r=0.703 and P<0.001, r=0.709, respectively). BNP levels on MV were lower in patients who successfully weaned compared to those who did not (361±523 ng/l versus 643±382 ng/l respectively, P=0.008). The presence of diastolic dysfunction was independently associated with weaning failure (odds ratio [OR] 11.23, confidence interval [CI] 1.16-109.1, P=0.037) followed by respiratory frequency/tidal volume (OR 1.05, CI 1.00-1.10, P=0.048). Therefore, assessment of LV diastolic function before the start of weaning could be useful to identify patients at risk of weaning failure.