Search results for "beat"

Photoplethysmography Analysis of Artery Properties in Patients with Cardiovascular Diseases

2008

In this study arterial parameters of healthy subjects were compared to those of patients with cardiovascular diseases. The photoplethysmography (PPG) measurements of blood volume pulsations have been performed. Using a novel algorithm for analysis of simultaneously measured ear and finger PPG signals, arterial parameters were evaluated in representative groups of healthy subjects and patients with cardiovascular diseases. Digital volume pulse (DVP), pulse cycle duration (T), augmentation index (AIx), reflection index (RI) and transit time of reflected wave (RTT) were evaluated in every heartbeat cycle. Correlations between the AIx and RI, T and RTT, AIx and standard deviation of AIx, RTT an…

New Approach of Controlling Cardiac Alternans

2018

The alternans of the cardiac action potential duration is a pathological rhythm. It is considered to be relating to the onset of ventricular fibrillation and sudden cardiac death. It is well known that, the predictive control is among the control methods that use the chaos to stabilize the unstable fixed point. Firstly, we show that alternans (or period-2 orbit) can be suppressed temporally by the predictive control of the periodic state of the system. Secondly, we determine an estimation of the size of a restricted attraction's basin of the unstable equilibrium point representing the unstable regular rhythm stabilized by the control. This result allows the application of predictive control…

Mujeres y espiritualidad: las beatas valencianas del siglo XVII

1991

Este artículo es un resumen del capítulo «El mundo enigmático de las beatas», incluido en mi tesis doctoral inédita «La Espiritualidad Valenciana. El lluminismo en los siglos XVI y XVII», dirigida por el Prof. Antonio Mestre y leída en la Universidad de Valencia el 31 de enero de 1989. En Valencia, a lo largo del siglo XVI, existían ejemplos de mujeres que, bien en sus casas solas o en comunidad con otras, emparedadas o no, dedicaban el resto de sus días a la religión. A estas conocemos con el nombre de beatas, fenómeno social de indudable interés en la espiritualidad valenciana del siglo XVII.

Distinctive body perception mechanisms in high versus low symptom reporters: A neurophysiological model for medically-unexplained symptoms.

2020

Abstract Objective The neurophysiological processes involved in the generation of medically-unexplained symptoms (MUS) remain unclear. This study tested three assumptions of the perception-filter model contributing to MUS: (I.) increased bodily signal strength (II.) decreased filter function, (III.) increased perception. Methods In this cross-sectional, observational study, trait MUS were assessed by a web-based survey (N = 486). The upper and lower decile were identified as extreme groups of high (HSR; n = 29; 26 women; Mage = 26.0 years) and low symptom reporters (LSR; n = 29; 21 women; Mage = 28.4 years). Mean heart rate (HR) and heart rate variability (HRV), and cortisol awakening respo…

Modified hemi-Fontan procedure on the beating heart

1998

the heart by infusing the cardioplegic solution under aortic occlusion by means of the balloon throughout the procedure. Even though the balloon catheter passes through the aortic valve, significant aortic valve insufficiency is not likely to occur because of the small caliber of the balloon catheter. We believe that the clinical application of this double-lumen aortic occlusion catheter will protect the myocardium in patients with a thoracoabdominal aortic aneurysm or distal descending aortic aneurysm who undergo the operation through the left thoracotomy with DHCA.

Aplauso en la beatificación del martir inuicto, el beato Pedro Arbues, llamado comunmente el Maestro Epila, Canonigo de la Seo de Zaragoça. y prime…

1664

Sig. A-F4

Behavioral Inhibition Underlies the Link Between Interoceptive Sensitivity and Anxiety-Related Temperamental Traits

2017

Interoceptive sensitivity is a biologically determined, constitutional trait of an individual. High interoceptive sensitivity has been often associated with proneness to anxiety. This association has been explained by elevated autonomic responsiveness in anxious individuals. However, in a heartbeat discrimination task (discrimination of heartbeats’ simultaneity to an external stimulus) low cardiac responsiveness has accompanied enhanced performance. The relation between these factors seems task dependent, and cannot comprehensively explain the link between interoceptive sensitivity and anxiety. We explored for additional explanatory factors for this link. More specifically, we studied which…

Bitecten. Beatificationis, et Canonizationes servi Dei Iacobi Illyrici, vulgò de Bitecto nuncupati, Laici Ordinis Minorum Observantium Sancti Franci…

1701

Tít. al marge lateral del text sobre Giacomo da Bitetto: Decretum S. Cong. Rituum cum approbatione ... Clementis XI super Cultu immemorabili B. Iacobi Illyrici Minor. Observ. S. Francisci Com a tít. del Breu (a la part inferior del f.), el que va al marge lateral Inclou: Breve ... Clementis XI Pro Indulge[n]tia plenaria perpetua in Ecclesijs Fratrum, & Monialium Ministro Generali Ordinis Minorum de Observa[n]tia subiectis, tàm erectis, quàm erigendis in toto Orbe. Pro Festo S. Rosae Virginis Viterbiensis eiusdem Ordinis die 4. Septembris [Dat. Romae ... die 14. Ianuarij 1701 Caplletres ornades

Corrigendum to ‘Automated detection and localization system of myocardial infarction in single-beat ECG using Dual-Q TQWT and wavelet packet tensor d…

2021

Autonomous frequency stabilization of two extended cavity diode lasers at the potassium wavelength on a sounding rocket

2016

We have developed, assembled, and flight-proven a stable, compact, and autonomous extended cavity diode laser (ECDL) system designed for atomic physics experiments in space. To that end, two micro-integrated ECDLs at 766.7 nm were frequency stabilized during a sounding rocket flight by means of frequency modulation spectroscopy (FMS) of 39^K and offset locking techniques based on the beat note of the two ECDLs. The frequency stabilization as well as additional hard- and software to test hot redundancy mechanisms were implemented as part of a state-machine, which controlled the experiment completely autonomously throughout the entire flight mission.