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the 12-Lead ECG

Chapter 5

pericarditis: inflammation of the pericardial-sac covering the heart.
sensor: a disc or tab made of plastic that has a metal component as wel l as a layer or well of gel or conducting substance
lead a configuration of positive and negative sensors, or electrodes, on the body surface that picks up the electrical information from the heart.
cable: one or more insulated wires that connect sensors to an electrocardiograph.
stylus: the needle of the ECG machine that forms a tracing on the graph paper.
galvanometer: a device in the ECG machine which detects electrical currents from a patient and converts it into mechanical energy,which is then recorded onto graph paper.
graph paper: paper on which the ECG is recorded that is preprinted wi th horizontal lines representing time and vertical lines representing voltage.
calibration: the process of setting a machine to a standardized scale so the results will be comparable and tests can be compared.
artifact: additional electrical activity on an ECG tracing as a result of muscle movement, alternating current (AC), or disruption of the cable, rather than the electrical activity of the heart.
isoelectric line: the baseline; a straight line on the ECG recording that represents an absence of electrical activity.
ventricular hypertrophy: enlargement of the ventricle.
ground lead: a lead that is not used to determine electrical activity,but rather as a reference point.
Created by: judithhuerta