The client is experiencing a drug-drug interaction with streptokinase and another drug. Which other drug can cause a drug- drug interaction with streptokinase?

Correct Answer: C

Rationale: Step 1: Streptokinase is a thrombolytic agent used to dissolve blood clots. Step 2: Heparin is an anticoagulant that also prevents blood clot formation. Step 3: Both streptokinase and heparin can increase the risk of bleeding when used together due to their similar mechanism of action. Step 4: This interaction can lead to excessive bleeding and must be carefully monitored. Step 5: Cimetidine, theophylline, and digoxin do not have a known significant drug-drug interaction with streptokinase. Summary: Choice C (Heparin) is the correct answer because it can potentially cause a drug-drug interaction with streptokinase by increasing the risk of bleeding. Choices A, B, and D do not have a significant interaction with streptokinase.

Correct Answer: B

Rationale: The correct answer is B: The total time for ventricular depolarization and repolarization. The QT segment on an electrocardiogram represents the time it takes for both ventricular depolarization (Q wave) and repolarization (T wave) to occur. This segment is important for assessing the risk of arrhythmias, as abnormalities in the QT interval can indicate potential cardiac issues. Choice A is incorrect because the QT segment does not represent atrial depolarization, which is typically seen in the P wave. Choice C is incorrect as it confuses the QT segment with atrial activity. Choice D is incorrect as it only mentions ventricular depolarization, while the QT segment encompasses both depolarization and repolarization of the ventricles.

Correct Answer: C

Rationale: The correct answer is C: Pacemaker. A third-degree AV block is a complete block of electrical signals between the atria and ventricles, leading to a slow heart rate and potential hemodynamic instability. The definitive treatment is to implant a pacemaker to regulate the heart rate and ensure proper conduction. Adenosine (A) is used for supraventricular tachycardias, not AV blocks. Epinephrine (B) and dopamine (D) are used for treating bradycardia in emergency situations but are not definitive treatments for third-degree AV block.

Correct Answer: D

Rationale: The correct answer is D because peanut butter is a good source of healthy fats and protein, which can be included in a TLC diet in moderation. Switching to 1% milk (A) reduces saturated fat intake, eating salmon (B) provides omega-3 fatty acids, and having a glass of wine (C) in moderation may have cardiovascular benefits. Peanut butter can be part of a heart-healthy diet, so the patient does not need to eliminate it completely.

Correct Answer: C

Rationale: The correct action is to auscultate for a pericardial friction rub (Choice C). This is because the patient's symptoms of chest pain that worsens with deep breaths and improves with leaning forward suggest pericarditis, a common complication post-MI. A pericardial friction rub is a classic sign of pericarditis. Assessing the feet for pedal edema (Choice A) is not relevant to the presenting symptoms. Palpating radial pulses bilaterally (Choice B) and checking the heart monitor for dysrhythmias (Choice D) are not the priority in this situation.