Which of the following complication occur within 24 hours after sustaining an myocardial infarction?

RUHS, Jaipur, PB B.Sc Nursing Entrance-2018

Medical & Surgical Nursing

Medium

Appeared in: RUHS, Jaipur, PB B.Sc Nursing Entrance-2018

Explanation

A myocardial infarction (MI) causes necrosis of heart muscle, which directly impairs the heart's ability to contract and pump blood effectively.
This immediate loss of pump function is known as acute heart failure, a primary complication that can manifest within minutes to hours of a large MI.
Signs of early heart failure include hypotension, pulmonary congestion (crackles on auscultation), and shortness of breath.
Cardiogenic shock is the most severe form of acute heart failure and is a major cause of mortality in the first 24 hours post-MI.

Option B: Pulmonary embolism is a complication of immobility, not a direct, immediate result of the MI itself. It takes time for a deep vein thrombus (DVT) to form and then embolize to the lungs.
Option C: A ventricular aneurysm is a late structural complication. It forms as the infarcted area heals and is replaced by a thin, non-contractile scar tissue that bulges outward. This process takes weeks to months.
Option D: An atrial septal defect (ASD) is a congenital condition (present at birth) and is not caused by a myocardial infarction.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Timeline of Myocardial Infarction Complications as background academic context rather than a clinical decision trigger.
A nurse's primary role in the first 24 hours post-MI is vigilant monitoring for life-threatening complications like arrhythmias and acute heart failure.
Recognizing early signs of heart failure (e.g., new S3 heart sound, crackles in the lungs, dropping O2 saturation, hypotension) allows for prompt intervention, which can prevent progression to cardiogenic shock.
What if? If the patient was 5 days post-MI and suddenly developed hypotension with a new, loud systolic murmur, the priority would shift to suspecting a mechanical complication like ventricular septal rupture or papillary muscle rupture, requiring immediate surgical consultation.

How to Approach the Question

First, identify the key elements of the question: the condition ('myocardial infarction') and the specific timeframe ('within 24 hours').
Next, analyze each option by considering its underlying pathophysiology and typical time of onset relative to the MI.
Ask yourself: Is this complication a direct and immediate result of muscle death, or is it a result of a later process like healing, inflammation, or immobility?
Heart failure is a direct result of lost pump function, making it an immediate possibility.
Pulmonary embolism is related to immobility, which takes time. Ventricular aneurysm is related to scarring, which takes weeks. Atrial septal defect is congenital.
By categorizing the complications based on their cause (immediate functional loss vs. later structural or secondary events), you can deduce that heart failure is the most likely complication within the first 24 hours.

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