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The limb electrodes can be far down on the limbs or close to the hips/shoulders as long as they are placed symmetrically. [30] Placement of American-color-coded ECG electrodes (using a 5-electrode yoke) Placement of European-color-coded ECG electrodes (using a 10-electrode yoke) Placement of the precordial electrodes
A typical electrode gel consists of a mixture of water, a thickener such as polyvinyl alcohol or carboxymethyl cellulose, and an electrolyte to increase conductivity. [ 1 ] [ 2 ] Some electrode gels have been shown to pose a potential fire risk when high-energy pulses are used, as for example when defibrillators are used.
The pacemaker generator is a hermetically sealed device containing a power source, usually a lithium battery, a sensing amplifier which processes the electrical manifestation of naturally occurring heart beats as sensed by the heart electrodes, the computer logic for the pacemaker and the output circuitry which delivers the pacing impulse to ...
ECoG electrode arrays typically consist of sixteen sterile, disposable stainless steel, carbon tip, platinum, Platinum-iridium alloy or gold ball electrodes, each mounted on a ball and socket joint for ease in positioning. These electrodes are attached to an overlying frame in a "crown" or "halo" configuration. [9]
Electrodes may be placed distally or proximally on the limb without affecting the recording. [5] The right leg electrode acts to reduce interference, and can be placed anywhere without an effect on the ECG results. [6] Each lead measures the electric field created by the heart during the depolarization and repolarization of myocytes. The ...
Some systems use caps or nets into which electrodes are embedded; this is particularly common when high-density arrays of electrodes are needed. [citation needed] Electrode locations and names are specified by the International 10–20 system [61] for most clinical and research applications (except when high-density arrays are used). This ...
Each Holter system has hardware (called monitor or recorder) for recording the signal, and software for review and analysis of the record. There may be a "patient button" on the front that the patient can press at specific instants such as feeling/being sick, going to bed, taking pills, marking an event of symptoms which is then documented in the symptoms diary, etc.; this records a mark that ...
Impedance cardiography (ICG) is a non-invasive technology measuring total electrical conductivity of the thorax and its changes in time to process continuously a number of cardiodynamic parameters, such as stroke volume (SV), heart rate (HR), cardiac output (CO), ventricular ejection time (VET), pre-ejection period and used to detect the impedance changes caused by a high-frequency, low ...
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