Author: "Gadelha EB" - Searchworks@Jio Institute Digital Library Search Results

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Author: Teixeira RA, Fagundes AA, Baggio Junior JM, Oliveira JC, Medeiros PTJ, Valdigem BP, Teno LAC, Silva RT, Melo CS, Elias Neto J, Moraes Júnior AV, Pedrosa AAA, Porto FM, Brito Júnior HL, Souza TGSE, Mateos JCP, Moraes LGB, Forno ARJD, D'Avila ALB, Cavaco DAM, Kuniyoshi RR, Pimentel M, Camanho LEM, Saad EB, Zimerman LI, Oliveira EB, Scanavacca MI, Martinelli Filho M, Lima CEB, Peixoto GL, Darrieux FCDC, Duarte JOP, Galvão Filho SDS, Costa ERB, Mateo EIP, Melo SL, Rodrigues TDR, Rocha EA, Hachul DT, Lorga Filho AM, Nishioka SAD, Gadelha EB, Costa R, Andrade VS, Torres GG, Oliveira Neto NR, Lucchese FA, Murad H, Wanderley Neto J, Brofman PRS, Almeida RMS, and Leal JCF
Subjects: Humans, Brazil, Heart, Cardiac Resynchronization Therapy Devices, Pacemaker, Artificial, Defibrillators, Implantable
Published: 2023
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Author: Gadelha-Costa A, Spara-Gadelha P, Filho FM, and Gadelha EB
Subjects: Anemia diagnostic imaging, Arteries abnormalities, Arteries physiopathology, Fetal Growth Retardation diagnostic imaging, Humans, Arteries diagnostic imaging, Fetus blood supply, Laser-Doppler Flowmetry, Ultrasonography, Prenatal
Abstract: The applicability of Doppler velocimetry has been well established regarding intrauterine growth restriction and fetal hypoxia. This method can also be used to determine fetal anemia and cardiac malformations. The main fetal arteries evaluated by Doppler velocimetry are the middle cerebral artery and the umbilical artery. However, the fetal aorta is responsible for the distribution of blood flow to the upper and lower extremities of the human body and should also be properly valued. In order to characterize abnormalities in the arteries of high-risk fetuses, it is necessary to know the hemodynamic modifications of normal fetuses. On this basis, the authors performed a review of fetal hemodynamics evaluated by Doppler velocimetry in the fetal aorta and middle cerebral and umbilical arteries during the second half of pregnancy. The study of fetal vessels by Doppler velocimetry indirectly evaluates the hemodynamic changes occurring in fetuses at risk. In this respect, we emphasize the changes in Doppler velocimetry occurring in fetal anemia, in restricted intrauterine growth, and in normal fetuses.
Published: 2007
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Author: Gadelha-Costa A, Spara-Gadelha P, Mauad-Filho F, and Gadelha EB
Subjects: Analysis of Variance, Blood Flow Velocity physiology, Gestational Age, Humans, Laser-Doppler Flowmetry, Middle Cerebral Artery diagnostic imaging, Observer Variation, Prospective Studies, Rheology methods, Systole, Ultrasonography, Doppler, Pulsed, Fetus blood supply, Middle Cerebral Artery physiology
Abstract: Objective: To assess peak systolic velocity values in middle cerebral artery (PSMCA) of normal fetuses from 22nd to 38th week of gestation., Material and Methods: We made a prospective study of 33 healthy fetuses from 22nd to 38th to determine peak systolic velocity by Doppler velocimetry. Doppler ultrasound was performed by a single observer, always using the same apparatus. The Doppler tracing was obtained with a sample volume of 1 mm; placement was on the anterior middle cerebral artery, as close as possible to the skullcap. The insonation angle was kept below 20 degrees and the wall filter was adjusted to a frequency of 50-100 Hz. The PSMCA increases from 26.3 cm/s to 57.7 cm/s in middle cerebral artery from 22nd to 38th week of gestation (p < 0.05). There was a significant positive correlation between PSMCA and the gestational values (p < 0.001, r2 = 60.5%)., Conclusion: In normal fetuses, the PSMCA increases from 22nd to 38th week of gestation. The Doppler velocimetry values for normal fetuses could be compared with those obtained during fetal anemia.
Published: 2006

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