A patient is seen in the emergency department after experiencing dizziness and shortness of breath for several days.During cardiac monitoring in the ED,the nurse notes the following findings: atrial rate 82 beats/min,P-P interval regular;ventricular rate 42 beats/min,R-R interval regular;PR interval variable with no relationship between P and QRS;and QRS complex 0.06 second with normal contour.The following ECG tracing was obtained: 
The nurse interprets this cardiac rhythm as which of the following?
Definitions:
Fixed Fee
A pricing structure where a single set price is charged for a service, regardless of the time or resources used to complete it.
Charge Per Copy
The amount billed for each photocopy or printed page, typically in the context of office equipment or copy services.
High-low Method
A technique used in cost accounting to estimate variable and fixed costs based on the highest and lowest levels of activity.
Machine Hours
A measure of the amount of time a machine is operated, used in accounting to allocate manufacturing overhead costs.
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