Which of the Following ECG Findings Would Indicate a Possible

question 76

Multiple Choice

Which of the following ECG findings would indicate a possible pacemaker failure?

• A) Occasional QRS complexes without pacer spikes
• B) A QRS duration of 0.20 seconds
• C) Pacemaker spikes without associated QRS complexes
• D) A pacemaker spike preceding each P wave

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Definitions:

Neuron-produced Chemicals

Chemicals, such as neurotransmitters, that are produced by neurons to transmit signals across the synapse to another neuron.

All-or-none Response

A principle that states a neuron fires with the same potency each time, although frequency can vary; it either fires or doesn't.

Electrical Charge

A fundamental property of matter that is responsible for electrical phenomena, existing in a positive or negative form.

Threshold

The level of intensity that must be exceeded for a certain reaction, phenomenon, result, or condition to occur or be manifested.