We describe a new technique to evaluate cardiac rhythm using color and pulsed Doppler ultrasonography to identify and record pulmonary arterial and venous waveforms. Fifty fetuses were examined during the second and third trimesters of pregnancy. Simultaneous pulsed Doppler recording of the pulmonary artery and vein was obtained in 100% of fetuses between 15 and 40 weeks' gestation. Atrial systole was identified from the pulmonary vein and was manifested by an interruption of venous flow. Ventricular systole was manifested by a sharp peak that returned toward the baseline before it continued through the duration of systole as a lower-velocity waveform. This technique has the following advantages: (1) the lung parenchyma is easily accessible, irrespective of fetal position; (2) the pulmonary arteries and veins are adjacent to each other as they enter and exit the lung, thus making it easy to simultaneously obtain Doppler recordings of these vessels; (3) the pulsed Doppler waveform has an appearance similar to an electrocardiogram.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.7863/jum.1993.12.11.669 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Caval vein obstruction resulting in right to left shunt and desaturation post-endocardial pacing implantation in a 3-year old: a case report.
Eur Heart J Case Rep
January 2025
Echocardiography Department, Great Ormond Street Hospital for Children, Great Ormond Street, London WC1N 3JH, UK.
Background: Superior caval vein obstruction is a rare complication of endocardial pacing lead implantation that can result in a right to left shunt.
Case Summary: A 3-year-old child with type 2 Brugada syndrome presented with mild cyanosis post-endocardial pacing implantation due to evolutionary right superior caval vein obstruction. This obstruction resulted in a right to left shunt across a previously unrecognized patent levo-atrial cardinal vein associated with partial anomalous pulmonary venous drainage.
Phosphodiesterase inhibition restoreshypoxia-induced cerebrovascular dysfunction subsequent to improved systemic redox homeostasis: A randomized, double-blind, placebo-controlled crossover study.
J Cereb Blood Flow Metab
January 2025
Neurovascular Research Laboratory, Faculty of Life Sciences and Education, University of South Wales, Pontypridd, UK.
To what extent sildenafil, a selective inhibitor of the type-5 phosphodiesterase modulates systemic redox status and cerebrovascular function during acute exposure to hypoxia remains unknown. To address this, 12 healthy males (aged 24 ± 3 y) participated in a randomized, placebo-controlled crossover study involving exposure to both normoxia and acute (60 min) hypoxia (Fi = 0.14), followed by oral administration of 50 mg sildenafil and placebo (double-blinded).
View Article and Find Full Text PDFComparing achievability and reproducibility of pulsed wave doppler and tissue doppler myocardial performance index and spatiotemporal image correlation annular plane systolic excursion in the cardiac function assessment of normal pregnancies.
J Perinat Med
January 2025
Perinatal Imaging Research Group, School of Clinical Medicine, Discipline of Women's Health, Faculty of Medicine, University of New South Wales, Sydney, NSW, Australia.
Objectives: Multiple techniques have been proposed for functional fetal cardiology, including pulsed-wave (PW) and tissue Doppler imaging (TDI), Myocardial Performance Index (MPI), annular plane systolic excursion (TAPSE/MAPSE) and spatiotemporal image correlation (STIC). We aimed to compare these techniques' achievability and reproducibility to determine their clinical utility for each cardiac side.
Methods: Uncomplicated pregnancies from 22 to 39 weeks were recruited and images and volumes stored for offline analysis.
Could Pulsed Wave Tissue Doppler Imaging Solve the Diagnostic Dilemma of Right Atrial Masses and Pseudomasses? A Case Series and Literature Review.
J Clin Med
December 2024
Department of Biomedical, Surgical and Dental Sciences, University of Milan, 20122 Milan, Italy.
Even if rarely detected, right atrial (RA) masses represent a diagnostic challenge due to their heterogeneous presentation. Para-physiological RA structures, such as a prominent Eustachian valve, Chiari's network, and lipomatous atrial hypertrophy, may easily be misinterpreted as pathological RA masses, including thrombi, myxomas, and vegetations. Each pathological mass should always be correlated with adequate clinical, anamnestic, and laboratory data.
View Article and Find Full Text PDFCardiovascular problems in rabbits in reference to hypothyroidism - a four-year retrospective study.
Pol J Vet Sci
December 2024
Department of Epizootiology and the Clinic of Infectious Diseases, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, Głęboka 30, 20-612 Lublin, Poland.
The effects of T4 are mainly manifested by positive ino- and chronotropism. The syndrome accompanying hypothyroidism in rabbits (impaired myocardial contractility and reduced ejection capacity) is caused by a deficiency of thyroid hormones - especially T4. The study group consisted of a total of 41 animals: 15 males and 26 females, ranging in age from 2 months to 8 years, with echocardiogram showing reduced fractional shortening (<30%), with normal results of heamatological and biochemical tests.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!