Parkinson's disease effect on autonomic modulation: an analysis using geometric indices by Mileide Cristina Stoco-Oliveira, Ana Laura Ricci-Vitor, Laís Manata Vanzella, Heloisa Balotari Valente, Vitor Eduardo dos Santos Silva, Larissa Borba André, Augusto Cesinando de Carvalho, David Matthew Garner, Luiz Carlos Marques Vanderlei

“…The Poincaré plot demonstrated that individuals with PD had lower beat-to-beat dispersion in RR intervals, in addition to greater long-term dispersion of RR intervals compared to CG. …”
Get full text

On the efficiency and accuracy of the single equivalent moving dipole method to identify sites of cardiac electrical activation by Sohn, Kwanghyun, Armoundas, Antonis

“…In conclusion, the optimal time for the SEMD estimation is at 15 % of RMS[subscript n], and at that time instant a median beat estimated from 4 beats is associated with a beat-to-beat variability of the SEMD location that is appropriate for catheter ablation procedures.…”
Get full text

Biomarkers based on continuous non-invasive blood pressure - review and outlook by Fortin Jürgen, Lerche Katja

“…Apart from the commonly used parameters systolic and diastolic BP, beat-to-beat as well as pulse shape information of these devices is not easily accessible. …”
Get full text

Alternans in atria: Mechanisms and clinical relevance by Giedrius Kanaporis, Lothar A. Blatter

“…Cardiac alternans, defined as cyclic beat-to-beat alternations in contraction force, action potential (AP) duration and intracellular Ca2+ release at constant stimulation rate, has been associated with the development of ventricular arrhythmias. …”
Get full text

Race-ing with the Times: Theatrical Exigency and Performative Politics in Trevor Nunn’s Othello (1989) by Fischer, Susan L.

“…An almost beat-by-beat re-viewing and re-reading of the temptation scene in Trevor Nunn’s 1989 National Theatre production of Othello registered a need to query whether the director’s decision to cast a (black) opera singer rather than a (Shakespearean) actor in the demanding role of Othello had been misguided. …”
Get full text

A realistic coupled nonlinear artificial ECG, BP and respiratory signal generator for assessing noise performance of biomedical signal processing algorithms by Clifford, G, McSharry, P

“…The model accurately reproduces many of the important clinical qualities of these signals such as QT dispersion, realistic beat to beat variability in timing and morphology and pulse transit time. …”

Improved pressure contour analysis for estimating cardiac stroke volume using pulse wave velocity measurement by Shun Kamoi, Christopher Pretty, Joel Balmer, Shaun Davidson, Antoine Pironet, Thomas Desaive, Geoffrey M. Shaw, J. Geoffrey Chase

“…The model parameters are identified beat-to-beat from the water-hammer equation using measured PWV, wave component of the pressure, and an estimate of subject-specific aortic dimension. …”
Get full text

Beating Rate Variability of Isolated Mammal Sinoatrial Node Tissue: Insight Into Its Contribution to Heart Rate Variability by Ori Shemla, Kenta Tsutsui, Kenta Tsutsui, Joachim A. Behar, Yael Yaniv

“…The data were harnessed to develop a beat detector to derive the beat-to-beat interval time series from EGM recordings. …”
Get full text

Detection of Atrial Fibrillation Episodes in Long-Term Heart Rhythm Signals Using a Support Vector Machine by Robert Czabanski, Krzysztof Horoba, Janusz Wrobel, Adam Matonia, Radek Martinek, Tomasz Kupka, Michal Jezewski, Radana Kahankova, Janusz Jezewski, Jacek M. Leski

“…However, detection of asymptomatic AF, which requires a long-term monitoring, is more efficient when based on irregularity of beat-to-beat intervals estimated by the heart rate (HR) features. …”
Get full text

Revisiting the Sequence Method for Baroreflex Analysis by Luiz Eduardo Virgilio Silva, Daniel Penteado Martins Dias, Carlos Alberto Aguiar da Silva, Hélio Cesar Salgado, Rubens Fazan

“…The sequence method is an important approach to assess the baroreflex function, mainly because it is based on the spontaneous fluctuations of beat-by-beat arterial pressure (for example, systolic arterial pressure or SAP) and pulse interval (PI). …”
Get full text

Cardiac Baroreflex, HRV, and Statistics: An Interdisciplinary Approach in Hypertension by Nadia Solaro, Mara Malacarne, Massimo Pagani, Daniela Lucini

“…Interests about the fine underpinnings of cardiovascular beat-by-beat variability have historical roots. Over the last decades, various aspects of the relationships between arterial pressure and heart period were taken as a proxy of the baroreflex in physiology and medicine, stimulating the interest of investigators in several interconnected scientific fields, in particular, bioengineering, neurophysiology, and clinical medicine. …”
Get full text

Atrial Near‐Field and Ventricular Far‐Field Analysis by Automated Signal Processing at Rest and During Exercise by Frank Eberhardt, Hendrik Bonnemeier, Martin Lipphardt, Ulrich G. Hofmann, Heribert Schunkert, Uwe K. H. Wiegand

“…Ideally, near‐fields and ventricular far‐fields ought to be distinguished by beat‐to‐beat template analysis of the atrial signal. …”
Get full text

City Lights and the Emergence of Beat Poetry: How Howl and Other Poems redefined Poetic and Cultural Boundaries in the mid-1950s by Peggy Pacini

“…This paper examines how City Lights, a San Francisco-based small press, became not only the lighthouse in the Bay for Beat and Beat-related artists and poets but also a countercultural organ of dissent channelling new poetic visions and aesthetics starting from the mid-1950s. …”
Get full text

NONLINEAR METHODS IN HEART RATE VARIABILITY by RYSZARD JAN BARCZYŃSKI, ANDRZEJ KUBASIK

“…We applied a net information flow method of determination of complexity in deterministic chaos (associated w ith nonlinear dynamics) to 24 hour recordings of beat-to-beat heart-rate. It is likely that analysis of HRV by the means of nonlinear dynamics may open a way for a new classification of HRV. …”
Get full text

Atypical electrical alternans due to left pleural effusion by P Vijay Shekar, Vickram Vignesh Rangaswamy

“…Electrical alternans i.e., beat to beat of variation of QRS amplitude has been classically described in pericardial tamponade. …”
Get full text

Nonlinear dynamics of cardiac alternans: subcellular to tissue level mechanisms of arrhythmia by Stephen eGaeta, David J Christini, David J Christini

“…Cardiac repolarization alternans is a rhythm disturbance of the heart in which rapid stimulation elicits a beat-to-beat alternation in the duration of action potentials and magnitude of intracellular calcium transients in individual cardiac myocytes. …”
Get full text

Nonlinear multivariate analysis of dynamic cerebral blood flow regulation in humans by Mitsis, G, Poulin, M, Robbins, P, Marmarelis, V

“…The dynamic relationship between cerebral blood flow, arterial blood pressure and arterial CO2 is studied using the Laguerre-Volterra network methodology for modeling multiple-input nonlinear systems. Spontaneous beat-to-beat cerebral blood flow velocity and mean arterial blood pressure fluctuations, as well as breath-to-breath end-tidal CO2 fluctuations are analyzed and the Volterra kernels of the system are obtained. …”

A dynamical model for generating synthetic electrocardiogram signals. by McSharry, P, Clifford, G, Tarassenko, L, Smith, L

“…In particular, both respiratory sinus arrhythmia at the high frequencies (HFs) and Mayer waves at the low frequencies (LFs) together with the LF/HF ratio are incorporated in the model. Much of the beat-to-beat variation in morphology and timing of the human ECG, including QT dispersion and R-peak amplitude modulation are shown to result. …”

The effect of hand H7 acupressure on the non-reactive pattern of fetal non stress test: A randomized clinical trial by Nahid Barati, Maryam Alikamali, Mahla Salarfard, Asma Nikhhah Bidokhti, Bahareh Zarei, Nahid Ghanbarzadeh

“…As maternal anxiety increases, fetal movements and beat to beat variability decrease. Acupressure releases enkephalins such as serotonin and endorphins and reduces maternal stress and anxiety levels. …”
Get full text

CVRanalysis: a free software for analyzing cardiac, vascular and respiratory interactions by Vincent Pichot, Christophe Corbier, Florian Chouchou, Jean-Claude Barthélémy, Frédéric Roche

“…Introduction: Simultaneous beat-to-beat R-R intervals, blood pressure and respiration signals are routinely analyzed for the evaluation of autonomic cardiovascular and cardiorespiratory regulations for research or clinical purposes. …”
Get full text