Cardiac output (CO), in conjunction with hemoglobin concentration and arterial oxygen saturation are the cornerstones of oxygen transport. Cardiac output is the functional expression of cardiovascular performance and can be used to confirm the need for, or usefulness of treatment. Determination of cardiac output is an important procedure in interventional cardiology and also used in cardiothora...

This study aimed to assess whether the combination of a B-type natriuretic peptide (BNP) level with various noninvasive hemodynamic parameters can help physicians more quickly and accurately diagnose congestive heart failure and determine the type of left ventricular dysfunction present in patients presenting to the emergency department with dyspnea. Subjects were 98 men (aged 64.57+/-1.23 year...

BACKGROUND Impedance cardiography (ICG) is a noninvasive method of determining hemodynamic parameters. It is clinically important to determine whether any change in ICG parameters occur due to changes in disease status or therapeutic interventions, or due to normal hemodynamic and technology variability. The objective of this study was to establish the intra- and inter-day reproducibility of IC...

BACKGROUND Heart failure (HF) accounts for about 5% of all causes of urgent hospital admissions, and the overall mortality of HF patients within 1 year after hospitalization is 17-45%. Transthoracic impedance cardiography (ICG) is a safe, non-invasive diagnostic technique that helps to detect various parameters that define different cardiac functions. The aim of this study was to investigate th...

UNLABELLED The present study investigated the hemodynamic profile using impedance cardiography (ICG) monitor during pneumoperitoneum for laparoscopic cholecystectomy versus bariatric surgery in order to determine the impact of body weight on hemodynamics. METHODS 32 adult patients (two groups, each 16 patients) were studied. Group 1 (16 patients) scheduled to undergo laparoscopic cholecystect...

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In general using several signal acquisition methods are applied to get cardio-impedance signal to analyse the cardiac output. The analysis completely based on frequency information obtained after applying frequency selection filters and frequency shaping filters. Here proposing a constructive approach involves a developed Non-Negative LMS (NNLMS) followed by filtering techniques to measure and ...

A new technique for determining the resonance frequency (f0) of four-terminal-pair air-dielectric capacitance standards is discussed. The resonance frequency is determined by measuring four parameters of the capacitance standards over a range of frequencies near f0. These parameters are the two-terminal-pair impedance coefficients as defined in an impedance matrix. From a knowledge of the four-...

BACKGROUND Findings indicative of a problem with circulation have been reported in patients with chronic fatigue syndrome (CFS). We examined this possibility by measuring the patient's cardiac output and assessing its relation to presenting symptoms. METHODS Impedance cardiography and symptom data were collected from 38 patients with CFS grouped into cases with severe (n = 18) and less severe...

In electrical impedance tomography (EIT) the impedance distribution is usually estimated in xed elements inside the object. The implicit assumption is most often that the impedance in each element is more or less independent of the other (neighboring) elements. In many cases, such as in the impedance imaging of the chest, this model might not be a feasible one. An example is the heart muscle an...