ECG ECG Equipment and Maintenance 2

Question 1

What is the purpose of the 60 Hz notch filter on an ECG machine?

Accepted Answer

Eliminate AC power line interference

Answer

The 60 Hz notch filter eliminates electrical interference from AC power lines, which is a common source of noise in US clinical environments.

Question 2

Which component of the ECG machine converts analog electrical signals to digital data?

Accepted Answer

Analog-to-digital converter (ADC)

Answer

The analog-to-digital converter (ADC) transforms the continuous analog voltage signals from electrodes into discrete digital values for processing and storage.

Question 3

How should ECG electrode gel be applied to ensure good conductivity?

Accepted Answer

Thin uniform layer between electrode and skin

Answer

A thin, uniform layer of conductive gel reduces impedance between the electrode and skin, improving signal quality without causing electrode movement.

Question 4

What is the recommended storage condition for ECG thermal paper?

Accepted Answer

Cool, dry environment away from heat and chemicals

Answer

ECG thermal paper should be stored in a cool, dry place away from heat, chemicals, and sunlight to prevent premature darkening of the thermal coating.

Question 5

What does a jagged, irregular baseline on an ECG tracing most likely indicate?

Accepted Answer

Poor electrode contact or muscle artifact

Answer

A jagged, irregular baseline is typically caused by poor electrode contact, patient movement, or muscle tremor artifact rather than a cardiac dysrhythmia.

ECG (Electrocardiogram) Practice Test

ECG (Electrocardiogram) Practice Test

ECG ECG Equipment and Maintenance 2