click below
click below
Normal Size Small Size show me how
Chapter 49
Electrocardiography and pulmonary function testing
Term | Definition |
---|---|
Artifact | Any irrelevant object or mark observed when examining specimens or graphic records that is not related to the object being examined—for example, a foreign object visible through a microscope or an erroneous mark on an ECG strip. |
Cardiac cycle | The sequence of contraction and relaxation that makes up a complete heartbeat. |
Depolarization | The loss of polarity, or opposite charges inside and outside; the electrical impulse that initiates a chain reaction resulting in contraction. |
Dysrhythmia | An irregularity in heart rhythm; also called arrhythmia. |
Electrode | Sensor that detects electrical activity. |
Forced Vital Capacity (FVC) | The greatest volume of air that a person is able to expel when performing rapid, forced expiration. |
Holter monitor | An electrocardiography device that includes a microchip or a small cassette recorder worn around a patient’s waist or on a shoulder strap to record the heart’s electrical activity. |
Hypoxemia | Low levels of oxygen in the blood |
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. |
Rhythm strip | An ECG tracing obtained using an electrocardiograph machine. |
Spirometry | A test used to measure breathing capacity |
Stress test | A procedure that involves recording an electrocardiogram while the patient is exercising on a stationary bicycle, treadmill, or stair-stepping ergometer, which measures work performed. |