MI complications involve death mainly due to which event?

MI complications involve death mainly due to which event?

• A. Cardiac tamponade
• B. Free-wall rupture
• C. Pneumothorax
• D. Ventricular fibrillation

Answer: (D)

The key idea is that death after a myocardial infarction is most often caused by a malignant electrical disturbance of the heart, specifically ventricular fibrillation. Ischemia makes the heart's electrical cells unstable, leading to chaotic, unorganized electrical activity in the ventricles. When the ventricles fibrillate, they fail to pump effectively, so blood flow stops and death can occur within minutes if rhythm isn’t restored. This arrhythmic, sudden cardiac death is the most common immediate mechanism after an MI. Mechanical complications like rupture leading to tamponade can cause death too, but they usually occur later and are less common than fatal arrhythmias in the acute phase. Pneumothorax isn’t a typical mechanism of death from MI.

The key idea is that death after a myocardial infarction is most often caused by a malignant electrical disturbance of the heart, specifically ventricular fibrillation. Ischemia makes the heart's electrical cells unstable, leading to chaotic, unorganized electrical activity in the ventricles. When the ventricles fibrillate, they fail to pump effectively, so blood flow stops and death can occur within minutes if rhythm isn’t restored. This arrhythmic, sudden cardiac death is the most common immediate mechanism after an MI.

Mechanical complications like rupture leading to tamponade can cause death too, but they usually occur later and are less common than fatal arrhythmias in the acute phase. Pneumothorax isn’t a typical mechanism of death from MI.