An optimized lead system for long-term esophageal electrocardiography.


:Long-term electrocardiography (ECG) featuring adequate atrial and ventricular signal quality is highly desirable. Routinely used surface leads are limited in atrial signal sensitivity and recording capability impeding complete ECG delineation, i.e. in the presence of supraventricular arrhythmias. Long-term esophageal ECG might overcome these limitations but requires a dedicated lead system and recorder design. To this end, we analysed multiple-lead esophageal ECGs with respect to signal quality by describing the ECG waves as a function of the insertion level, interelectrode distance, electrode shape and amplifier's input range. The results derived from clinical data show that two bipolar esophageal leads, an atrial lead with short (15 mm) interelectrode distance and a ventricular lead with long (80 mm) interelectrode distance provide non-inferior ventricular signal strength and superior atrial signal strength compared to standard surface lead II. High atrial signal slope in particular is observed with the atrial esophageal lead. The proposed esophageal lead system in combination with an increased recorder input range of ±20 mV minimizes signal loss due to excessive electrode motion typically observed in esophageal ECGs. The design proposal might help to standardize long-term esophageal ECG registrations and facilitate novel ECG classification systems based on the independent detection of ventricular and atrial electrical activity.


Physiol Meas


Niederhauser T,Haeberlin A,Marisa T,Mattle D,Abächerli R,Goette J,Jacomet M,Vogel R




Has Abstract


2014-04-01 00:00:00












  • Reference intervals for the evoked tympanic membrane displacement measurement: a non-invasive measure of intracranial pressure.

    abstract:OBJECTIVE:Evoked tympanic membrane displacement (TMD) is a non-invasive technique for assessing intracranial pressure (ICP). The aim of this study was to define reference intervals (RIs) in the healthy population. APPROACH:Measurements were made in 154 healthy adults. Results were quantified by V m, which is the most ...

    journal_title:Physiological measurement

    pub_type: 杂志文章


    authors: Campbell-Bell CM,Birch AA,Vignali D,Bulters D,Marchbanks RJ

    更新日期:2018-01-31 00:00:00

  • The effect of fracture and fracture fixation on ultrasonic velocity and attenuation.

    abstract::Measurement of the velocity of propagation and attenuation of ultrasound (200 kHz) is believed to be a useful non-invasive technique for assessing the mechanical properties of bone. A new method for the determination of ultrasound velocity and attenuation of longitudinal waves in cortical bone was used in vivo and in ...

    journal_title:Physiological measurement

    pub_type: 临床试验,杂志文章


    authors: Saulgozis J,Pontaga I,Lowet G,Van der Perre G

    更新日期:1996-08-01 00:00:00

  • Monitoring of body fluid redistribution using segmental bioimpedance during rotation on a short-radius centrifuge.

    abstract:OBJECTIVE:The creation of artificial gravity on board a space station is one of the promising methods for preventing health problems during space missions; a short-radius centrifuge (SRC) is the model of such a method on Earth. Our goal was to evaluate the sensitivity of bioimpedance polysegmental measurements for moni...

    journal_title:Physiological measurement

    pub_type: 杂志文章


    authors: Takhtobina YV,Shchelykalina SP,Smirnov YI,Smirnov AV,Koloteva MI,Vassilieva GY,Nikolaev DV

    更新日期:2020-05-07 00:00:00

  • A bio-telemetric device for measurement of left ventricular pressure-volume loops using the admittance technique in conscious, ambulatory rats.

    abstract::This paper presents the design, construction and testing of a device to measure pressure-volume loops in the left ventricle of conscious, ambulatory rats. Pressure is measured with a standard sensor, but volume is derived from data collected from a tetrapolar electrode catheter using a novel admittance technique. Ther...

    journal_title:Physiological measurement

    pub_type: 杂志文章


    authors: Raghavan K,Feldman MD,Porterfield JE,Larson ER,Jenkins JT,Escobedo D,Pearce JA,Valvano JW

    更新日期:2011-06-01 00:00:00

  • Obstructive sleep apnea-hypopnea results in significant variations in cerebral hemodynamics detected by diffuse optical spectroscopies.

    abstract::The objective of this study was to adapt a novel near-infrared diffuse correlation spectroscopy (DCS) flow-oximeter for simultaneous and continuous monitoring of relative changes in cerebral blood flow (rCBF) and cerebral oxygenation (i.e. oxygenated/deoxygenated/total hemoglobin concentration: Δ[HbO2]/Δ[Hb]/ΔTHC) dur...

    journal_title:Physiological measurement

    pub_type: 杂志文章


    authors: Hou Y,Shang Y,Cheng R,Zhao Y,Qin Y,Kryscio R,Rayapati A,Hayes D,Yu G

    更新日期:2014-10-01 00:00:00

  • Monitoring of heart rate and inter-beat intervals with wrist plethysmography in patients with atrial fibrillation.

    abstract:OBJECTIVE:Atrial fibrillation (AF) causes marked risk for patients, while silent fibrillation may remain unnoticed if not suspected and screened. Development of comfortable yet accurate beat-to-beat heart rate (HR) monitoring with good AF detection sensitivity would facilitate screening and improve treatment. The purpo...

    journal_title:Physiological measurement

    pub_type: 杂志文章


    authors: Harju J,Tarniceriu A,Parak J,Vehkaoja A,Yli-Hankala A,Korhonen I

    更新日期:2018-06-27 00:00:00

  • Comparison of different passive knee extension torque-angle assessments.

    abstract::Previous studies have used isokinetic dynamometry to assess joint torques and angles during passive extension of the knee, often without reporting upon methodological errors and reliability outcomes. In addition, the reliability of the techniques used to measure passive knee extension torque-angle and the extent to wh...

    journal_title:Physiological measurement

    pub_type: 杂志文章


    authors: Freitas SR,Vaz JR,Bruno PM,Valamatos MJ,Mil-Homens P

    更新日期:2013-11-01 00:00:00

  • Empirical mode decomposition analysis of HRV data from patients undergoing local anaesthesia (brachial plexus block).

    abstract::Spectral analysis of heart rate variability (HRV) is used for the assessment of cardiovascular autonomic control. In this study, a data-driven adaptive technique called empirical mode decomposition (EMD) and the associated Hilbert spectrum has been used to evaluate the effect of local anaesthesia on HRV parameters in ...

    journal_title:Physiological measurement

    pub_type: 临床试验,杂志文章


    authors: Shafqat K,Pal SK,Kumari S,Kyriacou PA

    更新日期:2011-04-01 00:00:00

  • Eye-tracker algorithms to detect saccades during static and dynamic tasks: a structured review.

    abstract:OBJECTIVE:Eye-tracking devices have become widely used as clinical assessment tools in a variety of applied-scientific fields to measure saccadic eye movements. With the emergence of multiple static and dynamic devices, the concurrent need for algorithm development and validation is paramount. APPROACH:This review ass...

    journal_title:Physiological measurement

    pub_type: 杂志文章,评审


    authors: Stuart S,Hickey A,Vitorio R,Welman K,Foo S,Keen D,Godfrey A

    更新日期:2019-02-26 00:00:00

  • Monitoring nasal conductance by bilateral nasal cannula pressure transducers.

    abstract::Nasal obstruction is common and may disturb well-being during daytime and sleep. Its objective assessment by standard methods requires patient cooperation and inconvenient instrumentation. Therefore, the purpose of this study was to develop a novel, unobtrusive technique for continuous monitoring of changes in nasal c...

    journal_title:Physiological measurement

    pub_type: 杂志文章


    authors: Thurnheer R,Bloch KE

    更新日期:2004-04-01 00:00:00

  • Dynamics of tissue shrinkage during ablative temperature exposures.

    abstract::There is a lack of studies that examine the dynamics of heat-induced shrinkage of organ tissues. Clinical procedures such as radiofrequency ablation, microwave ablation or high-intensity focused ultrasound, use heat to treat diseases such as cancer and cardiac arrhythmia. When heat is applied to tissues, shrinkage occ...

    journal_title:Physiological measurement

    pub_type: 杂志文章


    authors: Rossmann C,Garrett-Mayer E,Rattay F,Haemmerich D

    更新日期:2014-01-01 00:00:00

  • PaCO2 measurement in cerebral haemodynamics: face mask or nasal cannulae?

    abstract:OBJECTIVE:PaCO2 affects cerebral blood flow (CBF) and its regulatory mechanisms, but the effects of CO2 measurement technique on cerebrovascular parameters are unknown. In order to determine if the two most commonly used approaches, face mask (FM) or nasal cannulae (NC), are interchangeable or not, we tested the hypoth...

    journal_title:Physiological measurement

    pub_type: 杂志文章


    authors: Minhas JS,Robinson T,Panerai R

    更新日期:2017-06-22 00:00:00

  • Chronodiagnostic acquisition of recovery speed of heart rate under bathing stress.

    abstract::Cycling on an ergometer is one effective means of measuring cardiovascular function while applying stress on the heart. Bathing in a hot water bath applies a low stress to the heart. The electrocardiograms of a healthy adult male (aged 35 at the start of study) were recorded while taking a hot water bath with no elect...

    journal_title:Physiological measurement

    pub_type: 临床试验,杂志文章


    authors: Ishijima M,Togawa T

    更新日期:1999-11-01 00:00:00

  • A comparison of methods for estimating left ventricular volumes from radionuclide ventriculography.

    abstract::An accurate reproducible measurement of left ventricular volume is important in the evaluation of cardiac disease. Four methods of left ventricular volume measurement by radionuclide ventriculography have been compared and their reproducibility assessed in a patient group. The methods studied were a geometric method, ...

    journal_title:Physiological measurement

    pub_type: 杂志文章


    authors: Thorley PJ,Sheard KL,Rees MR

    更新日期:1993-02-01 00:00:00

  • A measurement of pulmonary blood volume increase during systole in humans.

    abstract::Pulmonary blood volume increase during systole was measured in patients by analysing chest images obtained during ECG gated radionuclide angiography examination. The difference in the total radiation counts between systole and diastole in regions of interest, which included the lungs and the left ventricle, was measur...

    journal_title:Physiological measurement

    pub_type: 临床试验,杂志文章


    authors: Nitzan M,Mahler Y,Schechter D,Yaffe S,Bocher M,Chisin R

    更新日期:1994-11-01 00:00:00

  • Phase shift between respiratory oscillations in cerebral blood flow velocity and arterial blood pressure.

    abstract::We aim to investigate whether phase shift between respiratory oscillations in cerebral blood flow velocity (CBFV) and arterial blood pressure (ABP) is associated with changes in cerebral autoregulation (CA) or reflects the mechano-elastic properties of the cerebrovascular bed. The relationships between respiratory pha...

    journal_title:Physiological measurement

    pub_type: 杂志文章


    authors: Uryga A,Placek MM,Wachel P,Szczepański T,Czosnyka M,Kasprowicz M

    更新日期:2017-02-01 00:00:00

  • The non-invasive and continuous estimation of cardiac output using a photoplethysmogram and electrocardiogram during incremental exercise.

    abstract::Cardiac output (CO) monitoring is not only essential for critically ill patients in the hospital, but also for patients at home and those undergoing cardiopulmonary exercise testing. However, CO is difficult to monitor during daily activities and exercise. In this paper, we aim at developing a novel CO estimation meth...

    journal_title:Physiological measurement

    pub_type: 临床试验,杂志文章


    authors: Wang L,Poon CC,Zhang YT

    更新日期:2010-05-01 00:00:00

  • Machine learning for nocturnal mass diagnosis of atrial fibrillation in a population at risk of sleep-disordered breathing.

    abstract:OBJECTIVE:In this research, we introduce a new methodology for atrial fibrillation (AF) diagnosis during sleep in a large population sample at risk of sleep-disordered breathing. APPROACH:The approach leverages digital biomarkers and recent advances in machine learning (ML) for mass AF diagnosis from overnight-hours o...

    journal_title:Physiological measurement

    pub_type: 杂志文章


    authors: Chocron A,Efraim R,Mandel F,Rueschman M,Palmius N,Penzel T,Elbaz M,Behar JA

    更新日期:2020-11-06 00:00:00

  • Validation of a finite-element solution for electrical impedance tomography in an anisotropic medium.

    abstract::Electrical impedance tomography is an imaging method, with which volumetric images of conductivity are produced by injecting electrical current and measuring boundary voltages. It has the potential to become a portable non-invasive medical imaging technique. Until now, implementations have neglected anisotropy even th...

    journal_title:Physiological measurement

    pub_type: 杂志文章


    authors: Abascal JF,Arridge SR,Lionheart WR,Bayford RH,Holder DS

    更新日期:2007-07-01 00:00:00

  • Patient examinations using electrical impedance tomography--sources of interference in the intensive care unit.

    abstract::Electrical impedance tomography (EIT) is expected to become a valuable tool for monitoring mechanically ventilated patients due to its ability to continuously assess regional lung ventilation and aeration. Several sources of interference with EIT examinations exist in intensive care units (ICU). Our objectives are to ...

    journal_title:Physiological measurement

    pub_type: 杂志文章


    authors: Frerichs I,Pulletz S,Elke G,Gawelczyk B,Frerichs A,Weiler N

    更新日期:2011-12-01 00:00:00

  • Sleep stage classification with ECG and respiratory effort.

    abstract::Automatic sleep stage classification with cardiorespiratory signals has attracted increasing attention. In contrast to the traditional manual scoring based on polysomnography, these signals can be measured using advanced unobtrusive techniques that are currently available, promising the application for personal and co...

    journal_title:Physiological measurement

    pub_type: 杂志文章


    authors: Fonseca P,Long X,Radha M,Haakma R,Aarts RM,Rolink J

    更新日期:2015-10-01 00:00:00

  • The measurement of sedentary patterns and behaviors using the activPAL™ Professional physical activity monitor.

    abstract::Epidemiological studies have associated the negative effects of sedentary time and sedentary patterns on health indices. However, these studies have used methodologies that do not directly measure the sedentary state. Recent technological developments in the area of motion sensors have incorporated inclinometers, whic...

    journal_title:Physiological measurement

    pub_type: 杂志文章


    authors: Dowd KP,Harrington DM,Bourke AK,Nelson J,Donnelly AE

    更新日期:2012-11-01 00:00:00

  • Circuit modeling of the electrical impedance: II. Normal subjects and system reproducibility.

    abstract::Part I of this series showed that the five-element circuit model accurately mimics impedances measured using multi-frequency electrical impedance myography (MFEIM), focusing on changes brought on by disease. This paper addresses two requirements which must be met if the method is to qualify for clinical use. First, th...

    journal_title:Physiological measurement

    pub_type: 杂志文章


    authors: Shiffman CA,Rutkove SB

    更新日期:2013-02-01 00:00:00

  • Comparison of four different FIM configurations--a simulation study.

    abstract::Focused impedance measurements (FIM) are used in several fields, and address the problem of measuring the volume impedance of an object within a volume conductor. Several electrode configurations are possible, and these have different properties. Sensitivity fields of four configurations have been investigated. We pre...

    journal_title:Physiological measurement

    pub_type: 杂志文章


    authors: Pettersen FJ,Ferdous H,Kalvøy H,Martinsen ØG,Høgetveit JO

    更新日期:2014-06-01 00:00:00

  • Detection of animal tissue thickness using simple vertical electric sounding (VES).

    abstract::Tetrapolar linear arrays are commonly used in geophysics to explore the vertical distribution of resistivity values in a geological section of a specific point on the earth. This technique, known as vertical electric sounding (VES), uses different electrode configurations. For our experiments, we utilized its more pop...

    journal_title:Physiological measurement

    pub_type: 杂志文章


    authors: Gonzalez CA,offniga O,Padilla LE

    更新日期:1997-02-01 00:00:00

  • Preliminary static EIT images of the thorax in health and disease.

    abstract::The results of a preliminary clinical evaluation of a one-frequency electrical impedance tomography (EIT) system enabling static in vivo imaging are presented. The design of the measuring system and image reconstruction software are described. Thirty-one subjects were examined and divided into four clinical groups. Th...

    journal_title:Physiological measurement

    pub_type: 临床试验,杂志文章


    authors: Cherepenin V,Karpov A,Korjenevsky A,Kornienko V,Kultiasov Y,Mazaletskaya A,Mazourov D

    更新日期:2002-02-01 00:00:00

  • Electroencephalography as a predictor of self-report fatigue/sleepiness during monotonous driving in train drivers.

    abstract:OBJECTIVE:In this study, electroencephalography activity recorded during monotonous driving was investigated to examine the predictive capability of monopolar EEG analysis for fatigue/sleepiness in a cohort of train drivers. APPROACH:Sixty-three train drivers participated in the study, where 32- lead monopolar EEG dat...

    journal_title:Physiological measurement

    pub_type: 杂志文章


    authors: Lees T,Chalmers T,Burton D,Zilberg E,Penzel T,Lal S,Lal S

    更新日期:2018-10-30 00:00:00

  • Age-related changes in pulse risetime measured by multi-site photoplethysmography.

    abstract:OBJECTIVE:It is accepted that changes in the peripheral pulse waveform characteristics occur with ageing. Pulse risetime is one important feature which has clinical value. However, it is unclear how it varies across the full age spectrum from child to senior and for different peripheral measurement sites. The objective...

    journal_title:Physiological measurement

    pub_type: 杂志文章


    authors: Allen J,O'Sullivan J,Stansby G,Murray A

    更新日期:2020-08-11 00:00:00

  • Trabecular thickness measurement in cancellous bones: postmortem rat studies with the zoom-in micro-tomography technique.

    abstract::Using the cross-sectional images taken with the zoom-in micro-tomography technique, we measured trabecular thicknesses of femur bones in postmortem rats. Since the zoom-in micro-tomography technique is capable of high resolution imaging of a small local region inside a large subject, we were able to measure the trabec...

    journal_title:Physiological measurement

    pub_type: 杂志文章


    authors: Cho MH,Chun IK,Lee SC,Cho MH,Lee SY

    更新日期:2005-10-01 00:00:00

  • Monitoring fetal maturation-objectives, techniques and indices of autonomic function.

    abstract::Monitoring the fetal behavior does not only have implications for acute care but also for identifying developmental disturbances that burden the entire later life. The concept, of 'fetal programming', also known as 'developmental origins of adult disease hypothesis', e.g. applies for cardiovascular, metabolic, hyperki...

    journal_title:Physiological measurement

    pub_type: 杂志文章,评审


    authors: Hoyer D,Żebrowski J,Cysarz D,Gonçalves H,Pytlik A,Amorim-Costa C,Bernardes J,Ayres-de-Campos D,Witte OW,Schleußner E,Stroux L,Redman C,Georgieva A,Payne S,Clifford G,Signorini MG,Magenes G,Andreotti F,Malberg H,Zaun

    更新日期:2017-05-01 00:00:00