The ECG machine mainly works on the principle of:
Detection and amplification of bioelectric potentials
An ECG machine works by placing surface electrodes on the body and sensing the small bioelectric potentials (of the order of millivolts) that the heart generates as its myocardial cells depolarise and repolarise. These signals are then amplified by a differential amplifier, filtered and displayed as the ECG trace.
Light-to-electrical conversion is used in pulse oximetry, heat-to-electrical in thermocouples, and magnetic-to-electrical in MRI — none of these is the ECG principle.
Hence, Detection and amplification of bioelectric potentials.
Similar Questions
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Important Questions from Basic Cardiovascular Investigations
Tall, peaked P waves on ECG are most commonly associated with:
What is the main purpose of the Einthoven triangle in electrophysiology?
What does the QT interval on a normal ECG primarily represent?
A patient presents with muscle weakness, and the ECG shows flattened T waves and prominent U waves. Which electrolyte imbalance is most probable?
Sinus bradycardia is associated with:
