Electrocardiogram (ECG) Devices
Lead wires connect the electrodes to an ECG machine. The heart's electrical activity is then recorded, interpreted, and printed. There is no electrical current sent into the body. Natural electrical impulses help maintain blood flowing properly by coordinating contractions in different areas of the heart.
Despite the higher resolution of the printouts, not all aspects of Electrocardiogram (ECG) Devices require precise measurements. For example, the amplitude and time of the P-waves are not measured. Similarly, the frequency of the QRS complex is not directly proportional to the amplitude.
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