All are true about Left ventricular failure except
**Left Ventricular Failure**
**Core Concept**
Left ventricular failure (LVF) occurs when the left ventricle of the heart is unable to pump enough blood to meet the body's needs, leading to inadequate cardiac output and potential complications such as pulmonary congestion and systemic hypoperfusion. The left ventricle's inability to pump effectively is often due to underlying conditions such as hypertension, coronary artery disease, or cardiomyopathy.
**Why the Correct Answer is Right**
The left ventricle's failure to pump effectively leads to increased pressure in the left atrium, causing pulmonary congestion and potentially resulting in pulmonary edema. This is due to the left atrium's inability to adequately drain into the left ventricle, causing a backlog of blood in the lungs. The clinical signs of LVF include fatigue, orthopnea, and paroxysmal nocturnal dyspnea.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because left ventricular failure is not typically associated with increased peripheral resistance, but rather decreased peripheral resistance due to decreased cardiac output.
**Option B:** This option is incorrect because left ventricular failure is not typically associated with increased systemic vascular resistance, but rather decreased systemic vascular resistance due to decreased cardiac output.
**Option C:** This option is incorrect because left ventricular failure is not typically associated with increased cardiac output, but rather decreased cardiac output.
**Clinical Pearl / High-Yield Fact**
A key clinical finding in left ventricular failure is the presence of a third heart sound (S3), which is due to the rapid filling of the ventricle during early diastole. This sound is often associated with a poor prognosis in patients with heart failure.
**Correct Answer:** C. Left ventricular failure is characterized by decreased cardiac output, not increased.