This year marks 40 years since the technique was designed of measuring and monitoring the basic haemodynamic parameters in humans by means of impedance cardiography (ICG), also known as "impedance plethysmography of the chest", "electrical bioimpedance of the chest" or "reocardiography". The method makes it possible to denote stroke volume and cardiac output. It also enables the factors to be a...

We demonstrate by theory, as well as by ex vivo and in vivo measurements that impedance plethysmography, applied extravascularly directly on large arteries, is a viable method for monitoring various cardiovascular parameters, such as blood pressure, with high accuracy. The sensor is designed as an implant to monitor cardiac events and arteriosclerotic progression over the long term.

We present a nonconforming Finite Element (FE) formulation for the electro-quasistatic case. The allows grid generation each sub-domain individually. At interfaces, we apply Nitsche-type mortaring, which can also be interpreted as DG-IP (Discontinuous Galerkin-Internal Penalty) formulation. Thereby, continuity of electric potential and flux in discrete setting is guaranteed. system matrix remai...

Impedance Cardiography (ICG) is a non invasive method useful for continuous monitoring of cardiac output but, it still has not found wide usage for measuring cardiac output in clinics and research. Most studies focused on comparing the cardiac output measured at rest with reference methods. In the present study we evaluated the validity of ICG against Doppler Echocardiography (DE) in measuring ...

The annual health care cost incurred by heart failure patients is about $56 billion, two thirds of which is spent on management of acutely decompensated patients. Hemodynamic evaluation is helpful for optimization of treatment, monitoring clinical outcomes, and overall prognostication of heart failure patients, but historically could only be obtained via costly invasive procedures that carry su...

Adaptive systems are employed in the cancelation of noises and estimation of periodic and quasi periodic signals. Amongst these signals are the electrocardiogram (ECG),impedance cardiography, brain evoked potentials and modulated signals in telecommunication applications. In this paper we study the behaviour of the weights of the LMS algorithm when used to estimate the coefficients of the discr...