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We demonstrate topological features in a spin-orbit coupled inhomogeneously polarized beam of light due to propagation of a linearly polarized focused Gaussian beam through a tilted-rotated (θ-ϕ) quartz crystal plate. The crystal plate is kept in a polarization interferometer, and transverse and longitudinal phase difference is introduced between the o- and e-wave-beams via (θ-ϕ) variation. The curvature in the phase difference, originating at a phase saddle, at the stem of an intensity forklet pattern, enables continuous rotation of the output two-lobe intensity pattern as a function of (θ-ϕ).
View Article and Find Full Text PDFHemodynamic variations in arterial wave reflection associated with the application of increasing levels of PEEP in healthy subjects.
Sci Rep
February 2022
Division of Anaesthesia and Intensive Care, Department of Surgical, Medical, Molecular and Critical Care Area, University of Pisa, Via Paradisa 2, 56124, Pisa, Italy.
Article Synopsis
- * Conducted with 62 healthy volunteers, measurements were taken using pulse contour wave analysis from the right carotid artery as PEEP levels were increased stepwise from 0 to 10 cmH2O.
- * Findings showed no significant changes in heart rate or left ventricular ejection time, but indicated that low levels of PEEP could prolong the diastolic phase and reduce the heart's systolic workload.
Intraventricular Vector Flow Imaging with Blood Speckle Tracking in Adults: Feasibility, Normal Physiology and Mechanisms in Healthy Volunteers.
Ultrasound Med Biol
December 2021
Department of Circulation and Medical Imaging, Norwegian University of Science and Technology, Trondheim, Norway; Department of Cardiology, St. Olav Hospital/Trondheim University Hospital, Trondheim, Norway.
This study examines the feasibility of blood speckle tracking for vector flow imaging in healthy adults and describes the physiologic flow pattern and vortex formation in relation to the wall motion in the left ventricle. The study included 21 healthy volunteers and quantified and visualized flow patterns with high temporal resolution down to a depth of 10-12 cm without the use of contrast agents. Intraventricular flow seems to originate during the isovolumetric relaxation with a propagation of blood from base to apex.
View Article and Find Full Text PDFE-wave propagation index (EPI) - A promising echocardiographic marker to improve left ventricular thrombus detection after STEMI?
Int J Cardiol
May 2021
University Clinic of Internal Medicine III, Cardiology and Angiology, Medical University of Innsbruck, Anichstrasse 35, A-6020 Innsbruck, Austria. Electronic address:
Association between the E-wave propagation index and left ventricular thrombus formation after ST-elevation myocardial infarction.
Int J Cardiol
March 2021
Department of Cardiology, Herlev & Gentofte Hospital, University of Copenhagen, Denmark.
Objective: To explore the association between E-wave propagation index (EPI) as a marker of apical washout and the risk of left ventricular thrombus (LVT) formation in patients with ST-elevation myocardial infarction (STEMI).
Methods: We performed a post-hoc analysis on 364 prospectively enrolled STEMI patients from a single-center. Non-contrast transthoracic echocardiographic examinations were performed a median of 2 days (IQR:1-3 days) after PCI.
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