A nurse is interpreting a client’s ECG strip.
Which of the following components of the ECG should the nurse examine to determine the time it takes for ventricular depolarization and repolarization?

Choice A rationale

Aspirin's antipyretic action reduces fever by inhibiting prostaglandin synthesis in the hypothalamus, but this is not the primary rationale for post-MI use. Normal body temperature: 36.5-37.5°C.

Choice B rationale

Aspirin acts as an antiplatelet agent by irreversibly inhibiting cyclooxygenase-1 (COX-1) enzyme, reducing thromboxane A2 production, thereby preventing platelet aggregation and thrombus formation. This helps reduce MI risk.

Choice C rationale

As an analgesic, aspirin inhibits COX enzymes, reducing prostaglandin synthesis and alleviating pain, but this is not the primary reason for its use in MI patients. Pain relief is a secondary benefit.

Choice D rationale

Aspirin's anti-inflammatory properties result from inhibiting COX enzymes and reducing prostaglandin synthesis, but this effect is not the primary rationale for its use post-MI. It helps but is not the main goal.

Choice A rationale

A red and beefy tongue suggests nutritional deficiencies like iron or vitamin B12 deficiency, not digoxin toxicity.

Choice B rationale

Constipation is a gastrointestinal issue, commonly related to diet, fluid intake, or other medications, not an indicator of digoxin toxicity.

Choice C rationale

Digoxin toxicity often manifests as visual disturbances, such as yellow or blurred vision, due to its effect on the central nervous system.

Choice D rationale

Weight gain is not associated with digoxin toxicity but may result from other conditions such as hypothyroidism or fluid retention.