A Patient-Specific Transfer Function based on a 1D Wave Propagation Model of the Arterial System

Hametner, Bernhard ;   Gerstenmayer, Anita ;   Parragh, Stephanie ;   Wassertheurer, Siegfried

Tags Cardiovascular modelsArterial pressureCardiovascular flow and hemodynamics

Since aortic blood pressure can only be measured invasively, transfer functions are necessary to calculate central pressure profiles from...

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Application of SOBI for Noise Reduction of Rat Magnetocardiograms

Higano, Sho ;   Yasuda, Shotaro ;   Ishiyama, Atsushi ;   Ono, Yumie ;   Hatsukade, Yoshimi

Tags Cardiovascular signal processing

The high-temperature superconductor (HTS) superconducting quantum interface device (SQUID) was used to measure magnetocardiograms (MCGs)...

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Assessment of Two Non-Invasive Pulse Transit Times as Markers of Blood Pressure

Gao, Mingwu ;   Chandrasekhar, Anand ;   Olivier, Bari ;   Mukkamala, Ramakrishna

Tags Pulse wave velocityArterial pressure

Non-invasive pulse arrival time (PAT, the time delay between ECG and distal photoplethysmography (PPG) waveforms) and non-invasive pulse...

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Association among Creatinine Level, Ejection Fraction and Non-Linear HRV Indices in Myocardial Infarction Patients

Italiano Monteiro, Clara ;   Henriques, Jorge ;   Borghi-Silva, Audrey ;   Trimer, Renata ;   Trimer, Vitor ;   Cabiddu, Ramona

Tags Cardiovascular signal processingHeart rate variabilityNon-linear cardiovascular or cardiorespiratory relations

In the present study the relationship between serum creatinine level (CL) and ejection fraction was evaluated in female myocardial infarction...

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Baroreflex Activation Induced Sympathoinhibition Markedly Improves Hemodynamics in Rats with Reduced Ejection Fraction

Oga, Yasuhiro ;   Sakamoto, Takafumi ;   Saku, Keita ;   Tohyama, Takeshi ;   Nishikawa, Takuya ;   Murayama, Yoshinori ;   Akashi, Takuya ;   Kishi, Takuya ;   Sunagawa, Kenji

Tags Heart failureBaroreflexHemodynamics

Sympathoexcitation plays a crucial role in the pathogenesis of heart failure (HF). Since baroreflex (BR) activation suppresses...

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Cardiovascular Adaptation to Chronic Hypoxia in Awake Rats

Shibata, Masahiro ;   Hamashima, Saki ;   Yamakoshi, Ken-ichi

Tags Cardiovascular flow and hemodynamicsCardiovascular system modelingHypoxia and hypercapnia

To examine how cardiovascular adaptation to chronic hypoxia would be evolved, the responses to blood pressure (BP) and hematocrit (Ht)...

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Cardiovascular Strain and Autonomic Imbalance in Neurosurgeons

de Oliveira Pimentel, Gonçalo ;   Vilarinho, António ;   Vaz, Rui ;   Cunha, João Paulo Silva

Tags HRV and blood pressure monitoringHeart rate variabilityAutonomic nervous system

We monitored cardiovascular intensity (CI) and heart rate variability (HRV) time and frequency domain features from two neurosurgeon’s...

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Computational Design and in Vitro Evaluation of a Catheter-Based Intravascular Rotary Blood Pump for Assisting Renal Blood Circulation

Sumikura, Hirohito ;   Ohnuma, Kentaro ;   Hanada, Shigeru ;   Tsukiya, Tomonori ;   Mizuno, Toshihide ;   Homma, Akihiko ;   Mukaibayashi, Hiroshi ;   Kojima, Koichi ;   Takewa, Yoshiaki ;   Tatsumi, Eisuke

Tags Ventricular assist devicesHeart failure

We are developing a catheter-based intravascular rotary blood pump for assisting renal blood circulation (Renal-RBP). This time, we designed...

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Contactless Quantitative Detection of Regional Myocardial Ischemia using a High-Speed Camera

Shiraishi, Yasuyuki

Tags Heart failureBlood flowCardiovascular flow and hemodynamics

Surgical ventricular restoration is one of the procedures for the patients with severe heart failure. Ventricular infarct exclusion may be...

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Development of a Lung Simulator to Study Normal and Abnormal Breathing Conditions

Liang, Jiu-Xing ;   Li, Jia-Quan ;   Luo, Yu-Xi ;   Chen, Jian-Hua ;   Sun, Fei-Fei ;   Li, Shuai

Tags Respiratory modelsGas transport models

A system of lung simulator is proposed to simulate normal breathing, hypopnea and Cheyne-Stokes breathing. In addition, it could real-time...

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Dynamic Left Ventricular Time-Varying Elastance

Palladino, Joseph

Tags Ventricular modelsCardiac modelingCardiovascular models

Modeling the canine left ventricle as a time, volume, and flow dependent pressure generator permits calculation of a dynamic time-varying...

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Effects of Cellular Anisotropy on Cardiac Biological Pacemaker Activity

Duverger, James Elber ;   Jacquemet, Vincent ;   Vinet, Alain ;   Comtois, Philippe

Tags Cardiac modelingPacemakersSimulation for cardiac arrhythmia

The biological pacemaker approach is an alternative to cardiac electronic pacemakers whose main objective to create a pacemaking activity...

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Evaluation of Arterial Stiffness by Analysis of Pulse Waveform at Carotid Artery

Odahara, Takuya ;   Saito, Masashi ;   Asada, Takaaki ;   Matsukawa, Mami

Tags Arterial pressureBlood flowPulse wave velocity

Pulse wave measurement was performed at the left common carotid artery using a piezoelectric transducer. It is known that the pulse wave...

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Evaluation of Arterial Stiffness using Rebound Amplitudes in the Step Response Curve

Wang, Jia-Jung ;   Liu, Shing-Hong ;   Su, Chun Jen ;   Tseng, Wei-Kung

Tags Vascular mechanicsCardiovascular signal processingTime-frequency, time-scale analysis of cardiovascular variability

This paper has been removed from the proceedings.

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Experimental Acute Inflammation Induces Sympatho-Excitation via the Resetting Baroreflex Neural Arc

Tohyama, Takeshi ;   Saku, Keita ;   Nishikawa, Takuya ;   Oga, Yasuhiro ;   Takehara, Takako ;   Akashi, Takuya ;   Kishi, Takuya ;   Ide, Tomomi ;   Sunagawa, Kenji

Tags Autonomic nervous systemBaroreflexHemodynamics

Although the link between the autonomic nervous system and inflammatory response is well known, it remains unknown how the inflammation...

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Experimental Study on the Pressure Wave Propagation in Viscoelastic Tube Mimicking Vessels with Stenosis

Ono, Shimpei ;   Ghigo, Arthur ;   Lagrée, Pierre-Yves ;   Matsukawa, Mami

Tags Arterial pressurePulse wave velocity

The effect of stenosis on the pressure wave propagation in the artery is studied. Mimicking the carotid artery in the neck, two types of...

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Fetal Heart Rate in the Course of Delivery: Vaginal and C-Sections

Argyri, Marina ;   Gayraud, Nathalie Therese Helene ;   Manis, George

Tags Heart rate variability

We compute the average FHR of 552 childbirths, categorized into two groups: vaginal deliveries and caesarian sections (C-sections). Our...

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Fine Grained Stress Assessment in Ecological Conditions

Tânia, Pereira ;   Moreira, Tiago ;   Almeida, Pedro ;   Cunha, João Paulo Silva ;   Aguiar, Ana

Tags Heart rate variabilityTime-frequency, time-scale analysis of cardiovascular variabilityCardiovascular signal processing

Wearable technology has seen substantial advances in recent years, mainly triggered by the need for noninvasive ways to monitor physiological...

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Improving the Accuracy of Manual Analysis of Respiratory Behavior by using Expectation-Maximization to Combine Results from Multiple Scorers

Robles-Rubio, Carlos Alejandro ;   Brown, Karen ;   Kearney, Robert Edward

Tags Sleep apneaPeriodic breathingRespiratory variability

We simulated analyses generated by multiple, manual scorers of respiratory behavior to evaluate Expectation-Maximization (EM), Majority Vote...

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Influence of Meshing on Simulation of Left Ventricular Wall Motion

Shimayoshi, Takao ;   Ogawa, Takafumi ;   Matsuda, Tetsuya

Tags Ventricular mechanicsCardiac muscle mechanicsCardiac modeling

Cardiac wall motion is generally simulated using structural mechanics analysis by finite element method. In standard structural dynamics...

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Lumped-Parameter Modeling of Cardiac Longitudinal Function

Maksuti, Elira ;   Carlsson, Marcus ;   Arheden, Håkan ;   Ugander, Martin ;   Broomé, Michael

Tags Cardiac modelingVentricular mechanicsHemodynamics

Cardiac longitudinal function is usually omitted in cardiovascular modeling. We have recently proposed a lump-parameter model based on...

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Mathematical Modeling of Extracorporeal CO2 Removal

Simon, Habran ;   Desaive, Thomas ;   Morimont, Philippe ;   Lambermont, Bernard ;   Dauby, Pierre

Tags Respiratory modelsPulmonary diseasePulmonary rehabilitation

Extracorporeal CO2 removal devices (ECCO2R) can be used in clinics to decarboxylate blood externally for patients suffering from pulmonary...

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Mindfulness Training in High-Performance Groups: Preliminary Findings from a Heart Rate Variability Study

Tarvainen, Mika ;   Kuoppa, Pekka ;   Fonne, Vivianne ;   Wagstaff, Anthony ;   Meland, Anders

Tags Heart rate variabilityAutonomic nervous system

Mindfulness training (MT) is one potential method for improving individual’s capabilities in regulating and focusing attention, which has...

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Nonlinear Identification of the Total Baroreflex Arc: Chronic Hypertension

Moslehpour, Mohsen ;   Kawada, Toru ;   Sunagawa, Kenji ;   Sugimachi, Masaru ;   Mukkamala, Ramakrishna

Tags BaroreflexNon-linear cardiovascular or cardiorespiratory relations

Second-order nonlinear dynamic models of the total baroreflex arc (i.e., the open-loop system relating carotid sinus pressure to arterial...

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Percentage of Heart Failure and ESPVR

Shoucri, Rachad M.

Tags Ventricular mechanicsHeart failureCardiac modeling

A mathematical formalism describing the non-linear end-systolic pressure-volume relation (ESPVR) is used to derive new indexes that can be...

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Respiratory Mechanics Evaluation during Non-Invasive Ventilation Leading to Optimal Ventilator Settings and Control

Montecchia, Francesco

Tags AirflowWork of breathingCritical care - ventilation

A new system (All-by-myself) have been specifically designed to detect during non-invasive ventilation (NIV) the most significant parameters...

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RiaMec – Automatic Mechanical Resuscitator for Catheterism Room

Tavilla, Agatino Christian ;   Stefanini, Igor

Tags Cardiopulmonary resuscitation - in the ICU and EMT settings

This document aims at introducing the development of a pre-industrial automatic heart resuscitator, able to drastically reduce the X-Rays...

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Simulation of Right Ventricular Failure in Patients with Left Ventricular Assist Device

Maksuti, Elira ;   Broomé, Michael

Tags Ventricular assist devicesCardiovascular system modelingHeart failure

Left ventricular assist devices (LVADs) are used as support for patients with life-threatening left heart failure. However, their use may...

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Suppression of Angiogenesis by Electric Stimulation using Ultra-Flexible and Ultra-Thin Electrodes

Inoue, Yusuke ;   Sekino, Masaki ;   Yokota, Tomoyuki ;   Sekitani, Tsuyoshi ;   Saito, Itsuro ;   Isoyama, Takashi ;   Abe, Yusuke ;   Yambe, Tomoyuki ;   Someya, Takao

Tags Cardiovascular regenerationCardiovascular structureVascular mechanics

The purpose is to observe angiogenesis in vivo under application of electric stimulations. We developed an implantable device equipped with a...

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The Development of Pulmonary Artery Input Impedance in Experimental Pulmonary Hypertension

Nishikawa, Takuya ;   Saku, Keita ;   Sakamoto, Takafumi ;   Kishi, Takuya ;   Sunagawa, Kenji

Tags Vascular impedancePulmonary hemodynamicsPulmonary disease

Although pulmonary hypertension (PH) is a disease of complex pulmonary arterial remodeling, the vascular mechanics has been evaluated by a...

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The Relationship Between Arm-Position and Systolic Blood Pressure Estimation Obtained from Pulse Transit Time

Maeda, Yuka ;   Sekine, Masaki ;   Tamura, Toshiyo ;   Mizutani, Koichi

Tags Pulse transit timeHRV and blood pressure monitoring

Pulse transit time (PTT) has a correlation with systolic blood pressure (SBP) and has been reported to be suitable for indirect SBP...

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