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Essay On Electrocardiography

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1.Electrocardiography is a graphical representation of electrical activity in the heart generated by an electrocardiograph, which is a modified oscilloscope. Electrodes are attached externally (or internally in some cases) in a 3-12 electrode configuration which allows different “views” of the heart

There are minute electrical charges generated during depolarization and repolarization that are represented graphically and can be interpreted as indicators of structural and electrical function, and can further be refined in interpretation if different view is used.

Before the ECG was invented (1901 by Willem Einthoven) P, Q, R, S and T where values assigned to represent corrective formulation of the measurements obtained from the capillary electrometer's waveform. These …show more content…

Positive and negative deflection from the isoelectric line is dependent on direction of electrical activity eg. if electrical depolarization moves toward positive electrode positive deflection is displayed and vice versa
7. The following questions refer to the mean electrical axis:
a. the mean electrical axis is an estimation of the net direction of electrical depolarization in the heart. (it can also refer to the ventricle electrical axis activity)
b. mean electrical axis is an indicator of physical structure electrical activity and deviation from normal axis activity which is electrical axis deviation.
c.Prior myocardial infarction is the occlusion of a heart vessel leading to tissue oxygen deprivation and heart dysfunction. Recent ischemia, is reduced blood to an area causing it not to receive sufficient oxygen supply and accumulation of toxins Pulmonary embolism, is the blockage of the pulmonary artery which causes pooling of the blood in front of the embolus and little to no blood to flow past. Myocardial hypertrophy. a disease in which a portion of the myocardium is hypertrophic (enlarged) creating functional impairment of the heart

8. The following questions refer to the 12 lead

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