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The process by which a graphic pattern is created to reflect the electrical impulses generated by the heart as it pumps.
pulmonary function test
A test that evaluates a patient's lung volume and capacity; used to detect and diagnose pulmonary problems or to monitor certain respiratory disorders and evaluate the effectiveness of treatment.
The sequence of contraction and relaxation that makes up a complete heartbeat.
The condition of having two separate poles, one of which is positive and the other, negative.
The loss of polarity, or opposite charges inside and outside; the electrical impulse that initiates a chain reaction resulting in contraction.
A sensor that detect electrical activity.
The tracing made by an electrocardiograph.
An instrument that measures and displays the waves of electrical impulses responsible for the cardiac cycle.
A peak or valley on an electrocardiogram.
A pen-like instrument that records electrical impulses on ECG paper.
A view of a specific area of the heart on an electrocardiogram.
A standardized measuring instrument used to check and adjust the volume indicator on a spirometer.