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Skin electrode gels are used extensively to reduce electrical resistance when using skin surface electrodes, both for medical instrumentation such as EEG, EMG and EKG, and for electrical stimulation treatments such as TENS, electrotherapy, electroconvulsive therapy and defibrillation.
Cardiac monitoring generally refers to continuous or intermittent monitoring of heart activity to assess a patient's condition relative to their cardiac rhythm.Cardiac monitoring is usually carried out using electrocardiography, which is a noninvasive process that records the heart's electrical activity and displays it in an electrocardiogram. [1]
Electrocardiography is the process of producing an electrocardiogram (ECG or EKG [a]), a recording of the heart's electrical activity through repeated cardiac cycles. [4] It is an electrogram of the heart which is a graph of voltage versus time of the electrical activity of the heart [ 5 ] using electrodes placed on the skin.
Recording can be activated in two ways. First, recording may be activated automatically according to heart rate ranges previously defined and set in the ILR by the physician. If the heart rate drops below, or rises above, the set rates, the ILR will record without the patient's knowledge.
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This mode is usually employed with the probe in physical contact with the skin or lesion to be destroyed. This method is notable for causing relatively little actual destruction at the point of skin contact, but a large zone of destruction beneath the skin, as the current from the probe fans out into the tissue below the point of contact.
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 ...
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