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This Concept Map, created with IHMC CmapTools, has information related to: ECG, Atrial systole begins about 100 msec after the P wave PQ segment represents time taken for impulse to travel from SA node to the AV node, Electrocardiograph is the instrument used to record Electrocardiogram (ECG or EKG), ventricular repolarization immediately before diastole ventricle takes a longer time to, a small downward deflection (Q), a tall sharp peak (R), and a final downward deflection (S) which appears as, AV node spreads through ventricular myocardium and depolarizes the muscle from 1 to 2, Electrocardiogram (ECG or EKG) shows 3 principal deflections above and below the baseline Normal Electrocardiogram, QRS complex is produced when signal from AV node spreads through ventricular myocardium and depolarizes the muscle, a small downward deflection (Q), a tall sharp peak (R), and a final downward deflection (S) ST segment corresponds to the plateau in the myocardial action potential and represents the time during which ventricles contract and eject blood T wave, P wave whereby Atrial systole begins about 100 msec after the P wave, SA node spread to atrial (causing atrial depolarization), a small downward deflection (Q), a tall sharp peak (R), and a final downward deflection (S) which appears as, P wave is produced when a signal from SA node, ventricular repolarization immediately before diastole ventricle takes a longer time to, Electrocardiograph records electrical currents in the heart, ???? T wave is smaller and more spread out than the QRS complex, and it has a rounder peak, P wave whereby, Electrocardiogram (ECG or EKG) shows 3 principal deflections above and below the baseline QRS complex, Electrocardiogram (ECG or EKG) shows 3 principal deflections above and below the baseline P wave, ventricular repolarization immediately before diastole ventricle takes a longer time to repolarise than to depolarise, T wave is generated by ventricular repolarization immediately before diastole