Which compensatory mechanism is involved in both chronic heart failure and decompensated heart failure, leading to fluid retention and edema?
Increased systemic blood pressure
Renin-angiotensin-aldosterone activation
Ventricular hypertrophy
Ventricular dilation
The Correct Answer is B
A. Increased systemic blood pressure – While systemic vasoconstriction may occur to maintain perfusion, it is a result of compensatory mechanisms like RAAS, not a primary mechanism leading to fluid retention and edema.
B. Renin-angiotensin-aldosterone activation – RAAS leads to:
Sodium and water retention via aldosterone
Vasoconstriction via angiotensin II
These changes increase intravascular volume, contributing to fluid overload and edema.
C. Ventricular hypertrophy – This is a structural adaptation to increased workload (pressure overload), not directly responsible for fluid retention.
D. Ventricular dilation – Dilation occurs as a result of chronic volume overload, not as a compensatory mechanism causing fluid retention.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. The compensatory stage involves subtle changes as the brain attempts to maintain normal ICP, typically without severe symptoms like dilated pupils.
B. The refractory stage is the final stage where brain injury is irreversible and signs are severe, often including coma.
C. The initial stage usually shows minimal or no symptoms.
D. The progressive stage of increased ICP is characterized by worsening neurological signs, including vomiting, dilated pupils due to cranial nerve compression, and decreased level of consciousness. These symptoms indicate that intracranial pressure is rising and beginning to impair brain function.
Correct Answer is A
Explanation
A. Headache is a common symptom caused by increased pressure inside the skull.
B. Increased urine output is not typically associated; in fact, decreased urine output can occur due to ADH release.
C. Increased intracranial pressure usually causes bradycardia (decreased heart rate) but in the context of Cushing’s triad, which includes hypertension and irregular respirations as well.
D. Hypotension is not a common finding; hypertension is more typical due to sympathetic response.
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