A nurse is caring for a client with a myocardial infarction. The nurse recognizes that the most common complication in the client following a myocardial infarction is?

Appeared in: DHS Staff Nurse - 2018 (Shift-2nd)

Explanation

Cardiac dysrhythmia is the most frequent complication after a myocardial infarction, occurring in approximately 90% of patients.
The primary cause is electrical instability of the heart muscle resulting from ischemia, injury, and necrosis.
Damaged myocardial cells disrupt the normal conduction pathways, leading to a wide range of rhythm disturbances, from benign premature ventricular contractions (PVCs) to life-threatening ventricular fibrillation (VF).
VF is a common cause of sudden death in the pre-hospital phase of an MI.

Option A: Right ventricular hypertrophy is a chronic condition involving the thickening of the right ventricle's wall. It is not an acute complication of an MI.
Option C: Left ventricular hypertrophy is a long-term adaptive change where the left ventricle thickens, typically due to chronic conditions like hypertension or aortic stenosis. It is a form of ventricular remodeling that occurs late after an MI, not the most common acute complication.
Option D: While electrolyte imbalances like hyperkalemia or hypokalemia can occur after an MI and can contribute to arrhythmias, they are not considered the single most common complication itself.

Clinical Relevance

Nursing practice connection: Use the key finding related to Most common complication of Myocardial Infarction (MI) to guide bedside assessment, documentation, and the next nursing action.
The primary nursing responsibility for a post-MI client is continuous cardiac monitoring to detect arrhythmias early.
Prompt identification and treatment of lethal arrhythmias (like VT and VF) with defibrillation and antiarrhythmic drugs are critical to prevent cardiac arrest and death.
Patient education should include symptoms of arrhythmias, such as palpitations, dizziness, or fainting, and the importance of seeking immediate help.

How to Approach the Question

First, identify the core of the question: it asks for the 'most common' complication of a myocardial infarction.
Recall the immediate effects of an MI on the heart. The primary event is the death of heart muscle due to lack of blood flow (ischemia).
Consider the function of heart muscle. It has both mechanical (pumping) and electrical (conduction) functions.
Evaluate the options based on this understanding. Ischemia directly impacts the electrical stability of the heart cells, making arrhythmias a very frequent and immediate consequence.
Differentiate between acute complications (like arrhythmias) and chronic changes (like hypertrophy). Hypertrophy is a long-term adaptation and not an immediate complication.
Eliminate options that are possible but not the 'most common'. While electrolyte changes can occur, they are a contributing factor rather than the most frequent primary complication.

Concept Tested & Keywords

Q71TG3D0fr1elPYwZzAuQw

E6 Pathology- ROBBINS & COTRAN PATHOLOGIC BASIS OF DISEASE 10TH Ed p. 555-557

E6 Medicine Davidson Principles Practice 24e p. 516-518

Practise the full DHS Staff Nurse - 2018 (Shift-2nd)

Attempt every question from this paper in a timed mock, then review the full solution for each one.