Electrocardiography (ECG) is the study of the heart's electrical activities. When your heart beats, electrical potentials spread through the muscles of your heart. The heart muscle is known as the myocardium. This causes the circulation of small currents through the body. The body, in this case, serves as a volume conductor. These tiny currents can be detected through the use of suitable electrodes and recorded as an electrocardiogram. Electrocardiography was discovered by Einthoven Willem, a Dutch Physiologist who is considered the father of physiology.
The instrument used for the detection and recording of the heart's electrical activities is known as an electrocardiograph. The graphical registration or record of the heart's electrical activities is known as an electrocardiogram. It is the summed electrical activity of the cardiac muscle fibers recorded from the body surface. The electrocardiogram is recorded in 12 leads.
The cardiologist fixes the electrodes on the limbs. In most cases, the left leg left arm, and right arm are chosen. The heart is said to be in the center of an imaginary equilateral triangle drawn by connecting the roots of these three limbs. This triangle is called Einthoven's triangle. The electrical potential generated from the heart appears simultaneously on the roots of these three limbs.
ECG has great application in cardiovascular physiology, and heart health as a whole. This book, which can be read in less than 24 hours will furnish you with the skills you need to totally crush ECG and its interpretation. With it, you can successfully tackle NCLEX at first sitting!
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