If a fibrinolytic drug is used for the treatment of acute myocardial infarction, the adverse effect most likely to occur is :
**Core Concept**
Fibrinolytic drugs, such as streptokinase and alteplase, are used to dissolve blood clots in the setting of acute myocardial infarction (AMI). These drugs work by activating plasminogen to plasmin, which then breaks down fibrin clots.
**Why the Correct Answer is Right**
The most common adverse effect of fibrinolytic therapy in AMI is bleeding, including hemorrhagic strokes, gastrointestinal bleeding, and intracranial hemorrhage. This is because fibrinolysis can disrupt the integrity of blood clots and lead to excessive bleeding, especially in patients with a high risk of bleeding, such as those with a history of stroke or taking anticoagulant medications.
**Why Each Wrong Option is Incorrect**
* **Option A:** Hypotension is not a direct adverse effect of fibrinolytic therapy, although it can occur due to the release of vasodilatory substances or the development of cardiac failure.
* **Option B:** Hypokalemia is not a common adverse effect of fibrinolytic therapy, although it can occur due to the release of potassium ions from the damaged myocardium.
* **Option C:** Cardiac rupture is a rare but serious complication of fibrinolytic therapy, especially in patients with a large infarct size or previous cardiac surgery.
**Clinical Pearl / High-Yield Fact**
Fibrinolytic drugs should be used with caution in patients with a history of bleeding disorders, recent stroke, or recent surgery, as these patients are at increased risk of bleeding complications.
**Correct Answer:** C. Cardiac rupture.