To understand the electrocardiograph, otherwise effn as the ECGÂ or EKGÂ, one must first get to know the human plaza. Most people know that the electrocardiogram measures the electric impulses of the substance, but have no idea of how or why the heart produces these impulses and what they mean. Next, a brief history of the events that led up to the invention of the electrocardiograph is in ball club. It is always insightful to travail into the thought processes and/or events that resulted in the formation of the tools used in present day. Upon completing these two exercises, one can melt on to the details surrounding the electrocardiograph itself. Only then, exit there be an appreciation of the important function it serves and a true understanding of how it works.
The human heart is in actuality a four-chambered pump for the circulatory scheme. The ventricles perform the main pumping function of the heart. The atria be blood storehouses while the ventricles are pumping. This resting/filling phase is called the diastoleÂ. The contractile, or pumping, phase is called systoleÂ. A serial publication of electrical events take induct in the heart during both of these phases. A specific condition of electrical activation in the musculature of the atria and ventricles causes the contraction of these structures.
The electrical activation patterns are initiated by a coordinated series of events that take place in the specialized conduction system of the heart, which is very small in comparison to the total loudness of the heart. Several dissimilar types of tissue make up the heart: SA and AV nodal tissue, atrial, Purkinje, and ventricular. Each tissue is electrically excitable and exhibits different characteristics which makes their rhythm distinguishable in measurement. Each heartbeat of the formula human heart originates in the SA node. A normal heart rate is...
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