A type of impedance plethysmography in which bioelectrical impedance is measured between electrodes positioned around the neck and around the lower thorax. It is used principally to calculate stroke volume and cardiac volume, but it is also related to myocardial contractility, thoracic fluid content, and circulation to the extremities.
The resistance to the flow of either alternating or direct electrical current.
Recording changes in electrical impedance between electrodes placed on opposite sides of a part of the body, as a measure of volume changes in the path of the current. (Stedman, 25th ed)
The volume of BLOOD passing through the HEART per unit of time. It is usually expressed as liters (volume) per minute so as not to be confused with STROKE VOLUME (volume per beat).
1,4:3,6-Dianhydro D-glucitol. Chemically inert osmotic diuretic used mainly to treat hydrocephalus; also used in glaucoma.
The region of the thorax that includes the PLEURAL CAVITY and MEDIASTINUM.
Act of listening for sounds within the heart.
The sounds heard over the cardiac region produced by the functioning of the heart. There are four distinct sounds: the first occurs at the beginning of SYSTOLE and is heard as a "lubb" sound; the second is produced by the closing of the AORTIC VALVE and PULMONARY VALVE and is heard as a "dupp" sound; the third is produced by vibrations of the ventricular walls when suddenly distended by the rush of blood from the HEART ATRIA; and the fourth is produced by atrial contraction and ventricular filling.
The amount of BLOOD pumped out of the HEART per beat, not to be confused with cardiac output (volume/time). It is calculated as the difference between the end-diastolic volume and the end-systolic volume.
The movement and the forces involved in the movement of the blood through the CARDIOVASCULAR SYSTEM.
The graphic recording of chest wall movement due to cardiac impulses.
Graphic registration of the heart sounds picked up as vibrations and transformed by a piezoelectric crystal microphone into a varying electrical output according to the stresses imposed by the sound waves. The electrical output is amplified by a stethograph amplifier and recorded by a device incorporated into the electrocardiograph or by a multichannel recording machine.
A technique of measuring the dielectric properties of materials, which vary over a range of frequencies depending on the physical properties of the material. The technique involves measuring, over a range of frequencies, ELECTRICAL IMPEDANCE and phase shift of an electric field as it passes through the material.
The force that opposes the flow of BLOOD through a vascular bed. It is equal to the difference in BLOOD PRESSURE across the vascular bed divided by the CARDIAC OUTPUT.
The number of times the HEART VENTRICLES contract per unit of time, usually per minute.
The continuous measurement of physiological processes, blood pressure, heart rate, renal output, reflexes, respiration, etc., in a patient or experimental animal; includes pharmacologic monitoring, the measurement of administered drugs or their metabolites in the blood, tissues, or urine.
PRESSURE of the BLOOD on the ARTERIES and other BLOOD VESSELS.
The statistical reproducibility of measurements (often in a clinical context), including the testing of instrumentation or techniques to obtain reproducible results. The concept includes reproducibility of physiological measurements, which may be used to develop rules to assess probability or prognosis, or response to a stimulus; reproducibility of occurrence of a condition; and reproducibility of experimental results.
A heterogeneous condition in which the heart is unable to pump out sufficient blood to meet the metabolic need of the body. Heart failure can be caused by structural defects, functional abnormalities (VENTRICULAR DYSFUNCTION), or a sudden overload beyond its capacity. Chronic heart failure is more common than acute heart failure which results from sudden insult to cardiac function, such as MYOCARDIAL INFARCTION.
Physical activity which is usually regular and done with the intention of improving or maintaining PHYSICAL FITNESS or HEALTH. Contrast with PHYSICAL EXERTION which is concerned largely with the physiologic and metabolic response to energy expenditure.
Recording of the moment-to-moment electromotive forces of the HEART as projected onto various sites on the body's surface, delineated as a scalar function of time. The recording is monitored by a tracing on slow moving chart paper or by observing it on a cardioscope, which is a CATHODE RAY TUBE DISPLAY.
The field of information science concerned with the analysis and dissemination of medical data through the application of computers to various aspects of health care and medicine.
Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories.
The order of amino acids as they occur in a polypeptide chain. This is referred to as the primary structure of proteins. It is of fundamental importance in determining PROTEIN CONFORMATION.
The genetic complement of a BACTERIA as represented in its DNA.
The relationships of groups of organisms as reflected by their genetic makeup.
The sequence of PURINES and PYRIMIDINES in nucleic acids and polynucleotides. It is also called nucleotide sequence.

Randomised comparison of electrode positions for cardioversion of atrial fibrillation. (1/174)

OBJECTIVE: To compare the relative efficacy of anteroanterior v anteroposterior electrode pad positions for external cardioversion of atrial fibrillation. DESIGN: Prospective randomised trial. SETTING: Tertiary referral cardiology centre in the United Kingdom. PATIENTS: 90 patients undergoing elective cardioversion for atrial fibrillation. INTERVENTIONS: Cardioversion was attempted with self adhesive electrode pads with an area of 106 cm2 placed either in the anteroanterior (AA) or anteroposterior (AP) positions. Initial shock was 100 J which, if unsuccessful, was followed by 200 J, 300 J, and 360 J if required. Peak current and transthoracic impedance were measured. MAIN OUTCOME MEASURES: Cardioversion success rate and energy requirements. RESULTS: Cardioversion was successful in 81% of the patients (73/90). There was no statistically significant difference in the cardioversion success rate (AA 84%, 38/45 patients; AP 78%, 35/45 patients; p = 0.42) or mean (SD) energy requirement for all patients (AA 223 (96.1) J; AP 232 (110) J) or for patients who were successfully cardioverted (AA 197.9 (82.4) J; AP 195.4 (97.2) J; p = 0.9) between the two pad positions. The mean transthoracic impedance (TTI) for the first shock (AA 77.5 (18.4) ohms; AP 73.7 (18.7) ohms; p = 0.34) was not significantly different between the two groups. TTI correlated significantly with body mass index, percentage body fat, and chest AP diameter. There was a progressive decrease in TTI with serial shocks. While aetiology and TTI were the two independent significant predictive factors for energy requirement, duration of atrial fibrillation was the only independent predictor of cardioversion success in a multivariate analysis. CONCLUSIONS: Electrode pad position is not a determinant of cardioversion success rate or energy requirement.  (+info)

Cyclic changes in right ventricular output impedance during mechanical ventilation. (2/174)

In a context such as acute respiratory distress syndrome, where optimum tidal volume and airway pressure levels are debated, the present study was designed to differentiate the right ventricular (RV) consequences of increasing lung volume from those secondary to increasing airway pressure during tidal ventilation. The study was conducted by combined two-dimensional echocardiographic and Doppler studies in 10 patients requiring mechanical ventilation in the controlled mode because of acute respiratory failure. Continuous monitoring of airway pressure on echocardiographic and Doppler recordings provided accurate timing of each cardiac event during the respiratory cycle, with particular attention being paid to end-expiratory and end-inspiratory atrial diameters, RV dimensions, and pulmonary artery and tricuspid flow estimated by the velocity-time integral (PA(VTI) and T(VTI), respectively). At baseline, lung inflation during the inspiratory phase of mechanical ventilation produced a drop in PA(VTI) from 14.3 +/- 2.6 cm at end expiration to 11.3 +/- 2.1 cm at end inspiration. This drop occurred without reduction in right atrial diameter or in RV diastolic dimensions. It was not preceded but was followed by a decrease in T(VTI), thus confirming an increase in RV outflow impedance. Manipulation of tidal volume without changing airway pressure and manipulation of airway pressure without changing tidal volume demonstrated that tidal volume, but not airway pressure, was the main determinant factor of RV afterloading during mechanical ventilation.  (+info)

Three-dimensional endocardial impedance mapping: a new approach for myocardial infarction assessment. (3/174)

Precise identification of infarcted myocardial tissue is of importance in diagnostic and interventional cardiology. A three-dimensional, catheter-based endocardial electromechanical mapping technique was used to assess the ability of local endocardial impedance in delineating the exact location, size, and border of canine myocardial infarction. Electromechanical mapping of the left ventricle was performed in a control group (n = 10) and 4 wk after left anterior descending coronary artery ligation (n = 10). Impedance, bipolar electrogram amplitude, and endocardial local shortening (LS) were quantified. The infarcted area was compared with the corresponding regions in controls, revealing a significant reduction in impedance values [infarcted vs. controls: 168.8 +/- 11. 7 and 240.7 +/- 22.3 Omega, respectively (means +/- SE), P < 0.05] bipolar electrogram amplitude (1.8 +/- 0.2 mV, 4.4 +/- 0.7 mV, P < 0. 05), and LS (-2.36 +/- 1.6%, 11.9 +/- 0.9%, P < 0.05). The accuracy of the impedance maps in delineating the location and extent of the infarcted region was demonstrated by the high correlation with the infarct area (Pearson's correlation coefficient = 0.942) and the accurate identification of the infarct borders in pathology. By accurately defining myocardial infarction and its borders, endocardial impedance mapping may become a clinically useful tool in differentiating healthy from necrotic myocardial tissue.  (+info)

Relations of stroke volume and cardiac output to body composition: the strong heart study. (4/174)

BACKGROUND: Although cardiac output (CO) plays the vital role of delivering nutrients to body tissues, few data are available concerning the relations of stroke volume (SV) and CO to body composition in large population samples. METHODS AND RESULTS: Doppler and 2D echocardiography and bioelectric impedance in 2744 Strong Heart Study participants were used to calculate SV and CO and to relate them to fat-free body mass (FFM), adipose mass, and demographic variables. Both SV and CO were higher in men than women and in overweight than normal-weight individuals, but these differences were diminished or even reversed by normalization for FFM or body surface area. In both sexes, SV and CO were more strongly related to FFM than adipose mass, other body habitus measures, arterial pressure, diabetes, or age. In multivariate analyses using the average of Doppler and left ventricular SV to minimize measurement variability, FFM was the strongest correlate of SV and CO; other independent correlates were adipose mass, systolic pressure, diabetes, age, and use of digoxin and calcium channel and beta-blockers. CONCLUSIONS: In a population-based sample, SV and CO are more strongly related to FFM than other variables; increased FFM may be the primary determinant of increased SV and CO in obesity.  (+info)

Ventricular afterload and ventricular work in fontan circulation: comparison with normal two-ventricle circulation and single-ventricle circulation with blalock-taussig shunts. (5/174)

BACKGROUND: Recent studies have indicated that there are inherent limitations associated with Fontan physiology. However, there have been no quantitative analyses of the effects of right heart bypass on ventricular afterload, hydraulic power, and resultant overall hemodynamics. Methods and Results- During routine cardiac catheterization, aortic impedance and ventricular hydraulic power were determined, both at rest and under increased ventricular work induced by dobutamine, in 17 patients with Fontan circulation, 15 patients with a single ventricle whose pulmonary circulation was maintained only by Blalock-Taussig shunts, and 13 patients who had normal 2-ventricle circulation. Both vascular resistance (nonpulsatile load on the ventricle) and pulsatile components of ventricular afterload (represented by low-frequency impedance) were significantly higher in the Fontan group than in the other groups (P<0.01), and this was associated with decreased cardiac output in the Fontan patients. In addition, hydraulic power cost per unit forward flow was 40% lower in the 2-ventricle circulation than in the single-ventricle circulation, suggesting lower ventricular efficiency in single-ventricle circulation attributable to the lack of a pulmonary ventricle. Furthermore, in the Fontan group, beta-adrenergic reserve was markedly decreased because of a limited preload reserve. CONCLUSIONS: Fontan physiology is associated with disadvantageous ventricular power and afterload profiles and has limited ventricular reserve capacity. Thus, to improve the long-term prognosis of patients after Fontan surgery, future research should be conducted into medical interventions that can overcome these limitations inherent in Fontan circulation.  (+info)

Endocardial and epicardial steroid lead pacing in the neonatal and paediatric age group. (6/174)

AIM: To compare the performance of steroid eluting epicardial and endocardial leads in infants and children requiring permanent pacing. METHODS: Evaluation of pacing and sensing characteristics, impedances, and longevity of 159 steroid eluting leads implanted in 95 children. Group A consisted of 24 children weighing less than 15 kg with 15 endocardial leads (five atrial, 10 ventricular) and 19 epicardial leads (five atrial, 14 ventricular). Group B consisted of 71 children weighing more than 15 kg with 106 endocardial leads (56 atrial, 58 ventricular) and 19 epicardial leads (nine atrial, 10 ventricular). RESULTS: Group A: Stimulation thresholds were lower for ventricular endocardial leads at implant (mean (SD) 0.84 (0.54) v 1.59 (0.64) V, p < 0.014) and at two year follow up (ventricular 0.64 (0.24) v 1.65 (0.69) V, p < 0.003). Impedance and sensing thresholds did not differ significantly at implant and follow up. Group B: Stimulation thresholds were lower for ventricular endocardial leads at implant (0.72 (0.48) v 1.48 (0.58) V, p < 0.001) and at follow up (0.88 (0.46) v 1.55 (0.96) V, p < 0.009). Impedance did not differ. Sensing thresholds were also better for ventricular endocardial leads at follow up (9.1 (5.2) v 14.2 (6.4) mV, p < 0.02). Complications requiring intervention occurred in both groups (n = 7 for endocardial v n = 18 for epicardial leads). CONCLUSIONS: Endocardial and epicardial steroid eluting leads have comparable performance in the paediatric population.  (+info)

Changes in the transthoracic impedance signal predict the outcome of a 70 degrees head-up tilt test. (7/174)

We determined whether early changes in central haemodynamics, as determined by transthoracic impedance, induced by a 70 degrees head-up tilt (HUT) test could predict syncope. Heart rate, arterial blood pressure and central haemodynamics [pre-ejection period and rapid left ventricular ejection time ( T (1)), slow ejection time ( T (2)) and d Z /d t (max) (where Z is thoracic impedance), assessed by the transthoracic impedance technique], were recorded during supine rest and during a 45 min 70 degrees HUT test in 68 patients (40+/-2 years) with a history of unexplained recurrent syncope. We found that 38 patients (42+/-3 years) had a symptomatic outcome to 70 degrees HUT (fainters) and 30 (39+/-2 years) had a negative outcome (non-fainters). When measured between 5 and 10 min of 70 degrees HUT, T (2) had increased significantly only in the fainters, and a change in T (2) of >40 ms from baseline predicted a positive outcome with a sensitivity of 68% and a specificity of 70%. During supine rest prior to 70 degrees HUT, the fainters exhibited a shorter T (2) than non-fainters (183+/-10 compared with 233+/-14 ms; P <0.01), and a T (2) of <199 ms predicted a positive outcome to 70 degrees HUT with a sensitivity of 68% and a specificity of 63%. Incorporation of the changes that occurred from rest to 70 degrees HUT in other haemodynamic variables (heart rate >11 beats/min, systolic pressure <2 mmHg, diastolic pressure <7 mmHg and pulse pressure <-3 mmHg) increased the specificity to 97% and the positive predictive value to 93%. Thus transthoracic impedance could detect differences in central haemodynamics between fainters and non-fainters during supine rest and during the initial period of 70 degrees HUT with a consistent sensitivity and specificity when combined with peripheral haemodynamic variables.  (+info)

Respiratory sinus arrhythmia during speech production. (8/174)

The amplitude of the respiratory sinus arrhythmia (RSA) was investigated during a reading aloud task to determine whether alterations in respiratory control during speech production affect the amplitude of RSA. Changes in RSA amplitude associated with speech were evaluated by comparing RSA amplitudes during reading aloud with those obtained during rest breathing. A third condition, silent reading, was included to control for potentially confounding effects of cardiovascular responses to cognitive processes involved in the process of reading. Calibrated respiratory kinematics, electrocardiograms (ECGs), and speech audio signals were recorded from 18 adults (9 men, 9 women) during 5-min trials of each condition. The results indicated that the increases in respiratory duration, lung volume, and inspiratory velocity associated with reading aloud were accompanied by similar increases in the amplitude of RSA. This finding provides support for the premise that sensorimotor pathways mediating metabolic respiration are actively modulated during speech production.  (+info)

There are two main types of heart failure:

1. Left-sided heart failure: This occurs when the left ventricle, which is the main pumping chamber of the heart, becomes weakened and is unable to pump blood effectively. This can lead to congestion in the lungs and other organs.
2. Right-sided heart failure: This occurs when the right ventricle, which pumps blood to the lungs, becomes weakened and is unable to pump blood effectively. This can lead to congestion in the body's tissues and organs.

Symptoms of heart failure may include:

* Shortness of breath
* Fatigue
* Swelling in the legs, ankles, and feet
* Swelling in the abdomen
* Weight gain
* Coughing up pink, frothy fluid
* Rapid or irregular heartbeat
* Dizziness or lightheadedness

Treatment for heart failure typically involves a combination of medications and lifestyle changes. Medications may include diuretics to remove excess fluid from the body, ACE inhibitors or beta blockers to reduce blood pressure and improve blood flow, and aldosterone antagonists to reduce the amount of fluid in the body. Lifestyle changes may include a healthy diet, regular exercise, and stress reduction techniques. In severe cases, heart failure may require hospitalization or implantation of a device such as an implantable cardioverter-defibrillator (ICD) or a left ventricular assist device (LVAD).

It is important to note that heart failure is a chronic condition, and it requires ongoing management and monitoring to prevent complications and improve quality of life. With proper treatment and lifestyle changes, many people with heart failure are able to manage their symptoms and lead active lives.

... (ICG), also referred to as electrical impedance plethysmography (EIP) or Thoracic Electrical ... The use of impedance cardiography in psychophysiological research was pioneered by the publication of an article by Miller and ... Impedance cardiography (ICG) is a non-invasive technology measuring total electrical conductivity of the thorax and its changes ... Kamath SA, Drazner MH, Tasissa G, Rogers JG, Stevenson LW, Yancy CW (August 2009). "Correlation of impedance cardiography with ...
The Impedance Cardiography (ICG or Ztot) signal represents the changes in the thoracic impedance due to variations in the blood ... Woltjer, H.H.; Bogaard, H.J.; de Vries, J.M. (1997). "The technique of impedance cardiography". Eur. Heart J. 18 (9): 1396-1403 ... quantium Medical Cardiac Output (qCO) uses impedance cardiography in a simple, continuous, and non-invasive way to estimate the ... Several authors advocate the high reliability and good correlation of cardiography impedance compared to others techniques more ...
Impedance cardiography K S Rabbani; M Sarker; M H R Akond; T Akter (1999). "Focused Impedance Measurement (FIM): A New ... FIM can be considered a bridge between Four Electrode Impedance Measurement (FEIM) and Electrical impedance Tomography (EIT), ... Identifying zones with specific impedances can provide greater certainty regarding the factors behind the impedance. ... "Thorax mapping for localized lung impedance change using focused impedance measurement (FIM): A pilot study". Electrical ...
Impedance cardiography (often abbreviated as ICG, or Thoracic Electrical Bioimpedance (TEB)) measures changes in electrical ... Ventura HO, Taler SJ, Strobeck JE (February 2005). "Hypertension as a hemodynamic disease: the role of impedance cardiography ... Bernstein, Donald P (2010). "Impedance cardiography: Pulsatile blood flow and the biophysical and electrodynamic basis for the ... Wang DJ, Gottlieb SS (September 2006). "Impedance cardiography: more questions than answers". Current Heart Failure Reports. 3 ...
"Bayesian inference of multi-sensors impedance cardiography for detection of aortic dissection". COMPEL - the International ... "Bayesian Uncertainty Quantification with Multi-Fidelity Data and Gaussian Processes for Impedance Cardiography of Aortic ...
Impedance cardiography Intraventricular block Stannius ligature Mantri S, Wu SM, Goodyer WR (July 2021). "Molecular Profiling ...
Nederend, I., ten Harkel, A.D.J, Blom, N., Berntson, G. & de Geus, E.J.C. (2017). Impedance cardiography in healthy children ...
"Bayesian Uncertainty Quantification with Multi-Fidelity Data and Gaussian Processes for Impedance Cardiography of Aortic ...
"On the Diagnosis of Aortic Dissection with Impedance Cardiography: A Bayesian Feasibility Study Framework with Multi-Fidelity ... "Bayesian Uncertainty Quantification with Multi-Fidelity Data and Gaussian Processes for Impedance Cardiography of Aortic ...
The principles behind the device Perl designed for this project became the foundation for impedance cardiography. This work ...
"Bayesian Uncertainty Quantification with Multi-Fidelity Data and Gaussian Processes for Impedance Cardiography of Aortic ...
They have been successfully used in impedance cardiography, wing-design optimization, robotic learning, and have more recently ... "On the Diagnosis of Aortic Dissection with Impedance Cardiography: A Bayesian Feasibility Study Framework with Multi-Fidelity ... "Bayesian Uncertainty Quantification with Multi-Fidelity Data and Gaussian Processes for Impedance Cardiography of Aortic ... "Bayesian inference of multi-sensors impedance cardiography for detection of aortic dissection". COMPEL - the International ...
"Bayesian Uncertainty Quantification with Multi-Fidelity Data and Gaussian Processes for Impedance Cardiography of Aortic ...
"B-type natriuretic peptide and impedance cardiography at the time of routine echocardiography predict subsequent heart failure ... "Diagnostic ability of B-type natriuretic peptide and impedance cardiography: testing to identify left ventricular dysfunction ...
Impedance cardiography is a method of non-invasively monitoring hemodynamics, through the use of 4 dual sensors placed on the ... base impedance), ΔZR are the changes of impedance due to the respiratory cycle, and ΔZC are the changes of impedance due to the ... Both Impedance cardiography and Electrical Cardiometry derive SV and CO from measurements of TEB, but the underlying model is ... The Impedance Cardiography model contributes the rapid change of bioimpedance which occurs shortly after aortic valve opening ...
1981). "A comparison of cardiac output as simultaneously measured by indicator dilution and impedance cardiography in normal ... The non-invasive bioelectrical impedance technology is a low-cost high technology system designed by Judy as a solution to high ... Already in 1981, Judy did a study showing that the transthoracic electrical impedance method for measuring cardiac output in ... Judy was introduced to the bioelectrical impedance method as a noninvasive means of measuring stroke volume and cardiac output ...
... and/or impedance cardiography (ICG). Furthermore, there are no current cures for pulmonary arterial hypertension, but there are ...
... where blood flow velocity was compared to total body cardiac output as determined by impedance cardiography. Two rhesus ...
... including ongoing projects with impedance cardiography and atrial fibrillation. Honors And Awards,. Henderson R.P. and Webster ... He first proposed the idea of electrical impedance tomography as a medical imaging technique in a publication in 1978. In his ... Webster, J. G. (ed.), Electrical impedance tomography, Adam Hilger, Bristol, England, 1990. Webster, J. G. (ed.), Teaching ... J.G. (1978) "An Impedance Camera for Spatially Specific Measurements of the Thorax". IEEE Trans. Biomed. Eng. 25: 250-254. (BLP ...
... recorded via impedance cardiography. These measures are beneficial because they provide accurate and perceiver-independent ...
... loudspeakers High impedance Immittance Impedance analyzer Impedance bridging Impedance cardiography Impedance control Impedance ... a calibrated reference impedance is adjusted to balance off the effect of the impedance of the device under test. Impedance ... The impedance of an ideal resistor is purely real and is called resistive impedance: Z R = R {\displaystyle \ Z_{R}=R} In this ... The impedance of a device can be calculated by complex division of the voltage and current. The impedance of the device can be ...
... may refer to ICG Communications Illinois Central Gulf Railroad Impedance cardiography, a hemorheology technique for ...
... impedance MeSH E01.370.370.610.610.200 - cardiography, impedance MeSH E01.370.370.750 - tilt-table test MeSH E01.370.372.200 - ... impedance MeSH E01.370.610.610.200 - cardiography, impedance MeSH E01.370.610.615 - plethysmography, whole body MeSH E01.370. ... cardiography, impedance MeSH E01.370.370.380.170 - cardiotocography MeSH E01.370.370.380.200 - coronary angiography MeSH ... acoustic impedance tests MeSH E01.370.382.375.060 - audiometry MeSH E01.370.382.375.060.050 - audiometry, evoked response MeSH ...
MindWare Impedance Cardiography Seminar and Workshop 2018. Impedance Cardiography Seminar and Workshop. September 8th - 9th, ... MindWare Impedance Cardiography Seminar and Workshop 2018. Search For. Search. MindWare Technologies Support. ,Training. , ... The 2018 Impedance Cardiography Seminar and Workshop is taking place September 8th and 9th at the Embassy Suites in Columbus, ... The seminar starts off with a rigorous curriculum based on the science surrounding impedance cardiography, including its origin ...
The hemodynamic pattern and thoracic fluid content were evaluated by impedance cardiography. In addition, office and 24-hour ... Pilot Study Using Impedance Cardiography Schiavone, Miguel; Blanco, Magalí; Ernst, Glenda; Salvado, Alejandro; Manuale, Osvaldo ...
... were measured at baseline and 12 weeks using impedance cardiography and electocardiography. Multivariable repeated measures ...
Impedance Cardiography Analysis Software Module. Part #: ACKICG. lesImpedance Cardiography (ICG) Analysis Module Take Charge of ...
For example, bio-impedance cardiography is highly sensitive to movement artifact, which can make reliable signal acquisition ... Methodological guidelines for impedance cardiography. Psychophysiology 27, 1-23. doi: 10.1111/j.1469-8986.1990.tb02171.x ... are measures of cardiac performance that may be non-invasively measured using techniques such as bio-impedance cardiography. In ... Smith, J. J., Muzi, M., Barney, J. A., Ceschi, J., Hayes, J., and Ebert, T. J. (1989). Impedance-derived cardiac indexes in ...
The use of impedance cardiography.. Panigrahi G; Pedersen A; Boudoulas H. J Med; 1983; 14(5-6):363-73. PubMed ID: 6583296. [TBL ...
We searched MEDLINE® using synonyms for "impedance cardiography;" the search strategy was restricted to the English language, ... were identified which assessed congestive heart failure patients with a need for fluid management with whole body impedance, ...
Single-Center Study in Lithuania to Evaluate the Role of Transthoracic Impedance Cardiography in the Diagnosis and Outcome ... Single-Center Study in Lithuania to Evaluate the Role of Transthoracic Impedance Cardiography in the Diagnosis and Outcome ...
CARDIOGR IMPEDANCE. Entry Term(s). Impedance Cardiography Impedance Plethysmography, Transthoracic Impedance, Transthoracic ... Cardiography, Impedance Preferred Concept UI. M0003458. Scope Note. A type of impedance plethysmography in which bioelectrical ... Plethysmography, Impedance, Transthoracic Plethysmography, Transthoracic Impedance Transthoracic Impedance Plethysmography ... Cardiography, Impedance Preferred Term Term UI T006625. Date01/01/1999. LexicalTag NON. ThesaurusID NLM (1979). ...
Ferrario CM, Flack JM, Strobeck JE, Smits G, Peters C. Individualizing hypertension treatment with impedance cardiography: a ...
The precision of the estimated optimum pacing interval was significantly smaller for impedance cardiography than either of the ...
"B-type natriuretic peptide and impedance cardiography at the time of routine echocardiography predict subsequent heart failure ... "Diagnostic ability of B-type natriuretic peptide and impedance cardiography: testing to identify left ventricular dysfunction ...
Impedance Cardiography. The ICG measures the mechanical function of the heart, providing us with information about your hearts ...
E.C. Pinheiro, O. Postolache, P.M. Girão, Contactless Impedance Cardiography Using Embedded Sensors, Measurement Science Review ... P. M. Ramos, F. M. Janeiro, P.M. Girão, Evaluation of the uncertainty of electrical impedance measurements: the GUM and its ... P. M. Ramos, F. M. Janeiro, P.M. Girão, Uncertainty evaluation of multivariate quantities: A case study on electrical impedance ... International Workshop on Impedance Spectroscopy - IWIS 2013, 1 review(s); * IEEE International Conference on Computational ...
... variables were noninvasively recorded in supine and upright position by the use of whole body impedance cardiography and radial ...
... were assessed via impedance cardiography. Data were analyzed via two-way repeated measures ANOVA (α=0.05). RESULTS: At rest, Q ... were assessed via impedance cardiography. Data were analyzed via two-way repeated measures ANOVA (α=0.05). RESULTS: At rest, Q ...
Cardiography, Impedance E1.370.610.610.200 Cardiology Service, Hospital N2.278.354.422.215 N2.278.216.500.968.215 ... Impedance E1.370.610.610 Plethysmography, Whole Body E1.370.610.615 E1.370.370.610.805 Plutonium D1.268.33.700 Pneumocephalus ...
The fiducial points were annotated on seismocardiography (SCG) and impedance cardiography (ICG) signals recorded simultaneously ... smartphone cardiography, and in wearable devices aimed at health and well-being applications. ...
CARDIOGR IMPEDANCE. Entry Term(s). Impedance Cardiography Impedance Plethysmography, Transthoracic Impedance, Transthoracic ... Cardiography, Impedance Preferred Concept UI. M0003458. Scope Note. A type of impedance plethysmography in which bioelectrical ... Plethysmography, Impedance, Transthoracic Plethysmography, Transthoracic Impedance Transthoracic Impedance Plethysmography ... Cardiography, Impedance Preferred Term Term UI T006625. Date01/01/1999. LexicalTag NON. ThesaurusID NLM (1979). ...
... no impedance cardiogram,noun,E0701711,impedance cardiography,noun,E0515462,no left ventriculogram,noun,E0700202,left ... ultrasonic cardiography,noun,E0343132,no radio-cardiogram,noun,E0592889,radio-cardiography,noun,E0433145,no percutaneous ... cardiography,noun,E0015279,no 4-vessel cerebral angiogram,noun,E0669323,4-vessel cerebral angiography,noun,E0669322,no ... vector cardiography,noun,E0064159,no pneumogram,noun,E0069629,pneumography,noun,E0067974,no magnetocardiogram,noun,E0227074, ...
Vital signs, spirometry, arterial and venous blood nitrite levels, impedance cardiography, peripheral arterial tonometry, ...
Methodological guidelines for impedance cardiography. Psychophysiology 1990 Jan;27(1):1-23. [Medline] ... The output of each front-end is low-impedance, allowing for a low-noise connection to the differential ECG amplifier inside of ... Kelsey RM, Guethlein W. An evaluation of the ensemble averaged impedance cardiogram. Psychophysiology 1990 Jan;27(1):24-33. [ ... impedance measurements, and/or multiple electrocardiogram (ECG) channels [3-5]. Additional statistical approaches utilize a ...
... impedance cardiography for stroke volume and cardiac output; WinCPRS software to estimate power spectrum density of heart rate/ ... bioelectrical impedance spectroscopy, and a BiodexTM dynamometer as well as gas analyzers, clinical and biochemistry lab space ...
A TTE is a clinical tool to evaluate the structure and function of the heart. All four chambers and all four valves can be assessed by TTE, but the quality and visibility of these structures varies from person to person. Other structures visible on TTE include the aorta, the pericardium, pleural effusions, ascites, and inferior vena cava. It can be used to diagnose a heart attack, enlargement/hypertrophy of the heart, infiltration of the heart from an abnormal substance (e.g. amyloidosis). Weakness of the heart, and cardiac tumors. With advanced measurements of the movement of the tissue with time (Tissue Doppler), it can measure diastolic function, fluid status,[1] and ventricular dyssynchrony. TTE in adults is also of limited use for the structures at the back of the heart, such as the left atrial appendage. Transesophageal echocardiography may be more accurate than TTE because it excludes the variables previously mentioned and allows closer visualization of common sites for vegetations and ...
Cardiography, Impedance Entry term(s). Cardiographies, Impedance Impedance Cardiographies Impedance Cardiography Impedance ... Cardiographies, Impedance. Impedance Cardiographies. Impedance Cardiography. Impedance Plethysmographies, Transthoracic. ... Cardiography, Impedance - Preferred Concept UI. M0003458. Scope note. A type of impedance plethysmography in which ... Impedance, Transthoracic Impedances, Transthoracic Plethysmographies, Transthoracic Impedance Plethysmography, Impedance, ...
Heart surgery. Heart transplantation Classify works on surgery of coronary vessels in general, heart valves, myocardium, etc., here. Classify works on surgery of the aorta in WG 410. Classify works on surgery of a particular disorder with the disorder. Classify works on cardiac anesthesia in WG 460.. ...
2 Cardiography, Impedance. *2 Child, Preschool. *2 Clinical Trials as Topic. *2 Double-Blind Method ... Impedance plethysmographic observations in thoracic outlet syndrome.. Nerurkar, S N; Jindal, G D; Pedhenekar, S A; Gupta, D K; ... Effect of pulmonary circulation on vector impedance cardiogram.. Pedhnekar, S A; Jindal, G D; Nerurkar, S N; Dharani, J B; ... Evaluation of state of circulation in radiation injury using impedance plethysmography.. Iyer, G K; Jindal, G D; Pedhnekar, S A ...
... impedance cardiography, pulse wave analysis, ageing, arterial stiffness, cardiac function, head-up tilt, impedance cardiography ...
Impedance cardiography: a useful and reliable tool in optimization of cardiac resynchronization devices Europace 2007 9(9):744- ... Hung-Fat Tse, Cannas Yu, Euljoon Park and Chu-Pak Lau Impedance Cardiography for Atrioventricular Interval Optimization During ... Impedance Cardiography as a Noninvasive Technique for Atrioventricular Interval Optimization in Cardiac Resynchronization ...
  • A type of impedance plethysmography in which bioelectrical impedance is measured between electrodes positioned around the neck and around the lower thorax. (nih.gov)
  • Continuous measurements included beat- to-beat blood pressure, electrocardiography derived RR-intervals, and impedance cardiography for a 30 min baseline period with a subsequent 60 min post-drink period.Results: In response to mineral water, but not distilled water, we observed significant time effects with decreases in heart rate and double product and increases in baroreflex sensitivity. (unifr.ch)
  • Impedance cardiography: a useful and reliable tool in optimization of cardiac resynchronization devices Europace 2007 9(9):744-750. (sciendo.com)
  • Impedance Cardiography as a Noninvasive Technique for Atrioventricular Interval Optimization in Cardiac Resynchronization Therapy. (sciendo.com)
  • Peripheral capillary rarefaction is assessed by nail fold capilloscopy and cardiac output by impedance cardiography. (georgetown.edu)
  • 9. Signal-morphology impedance cardiography during incremental cardiopulmonary exercise testing in pulmonary arterial hypertension. (nih.gov)
  • Pre-ejection period (PEP), a marker of sympathetic activation, and respiratory sinus arrhythmia (RSA), a marker of parasympathetic activation, were measured at baseline and 12 weeks using impedance cardiography and electocardiography. (nih.gov)
  • Combining the blood test results with additional cardiovascular risk testing, such as carotid intimal medial thickness (IMT) scanning, Exercise Stress Testing, and Impedance Cardiography (ICG) allows our team to prepare a personalized treatment plan designed specifically to reduce your risk of cardiovascular disease. (mycrfp.com)
  • The hemodynamic pattern and thoracic fluid content were evaluated by impedance cardiography . (bvsalud.org)