Left-sided heart failure is characterized by
A.
jugular vein distention.
B.
peripheral edema.
C.
decreased systemic vascular resistance.
D.
pulmonary congestion.
The correct answer and Explanation is :
The correct answer is D. pulmonary congestion.
Explanation:
Left-sided heart failure occurs when the left ventricle is unable to effectively pump blood out of the heart into systemic circulation. This leads to a backup of blood in the left atrium and the pulmonary veins, which causes increased pressure in the pulmonary circulation. As a result, fluid leaks into the lungs, leading to pulmonary congestion and symptoms such as shortness of breath (dyspnea), orthopnea (difficulty breathing while lying down), and paroxysmal nocturnal dyspnea (sudden nighttime shortness of breath).
Here’s how the other options relate to heart failure:
- Jugular vein distention (Option A):
This is a sign of right-sided heart failure rather than left-sided. When the right ventricle fails, blood backs up into the venous system, causing distention of the jugular veins due to increased pressure. - Peripheral edema (Option B):
Like jugular vein distention, peripheral edema is primarily a symptom of right-sided heart failure, where blood backs up into the systemic veins and fluid leaks into peripheral tissues, causing swelling, particularly in the legs and ankles. - Decreased systemic vascular resistance (Option C):
In heart failure, the body compensates by increasing systemic vascular resistance to maintain blood pressure. However, in advanced or decompensated heart failure, systemic vascular resistance may eventually decrease as the body’s compensatory mechanisms fail. This is not a hallmark of early-stage left-sided heart failure.
In summary, the defining feature of left-sided heart failure is pulmonary congestion due to the inability of the left ventricle to manage blood volume, leading to fluid buildup in the lungs. Other signs, like jugular vein distention or peripheral edema, are more associated with right-sided heart failure.