Which of the following is NOT a common diagnostic finding associated with right-sided CHF?

In the context of right-sided congestive heart failure (CHF), the most accurate assessment of diagnostic findings involves understanding the typical clinical and laboratory markers associated with heart failure.

Elevated BNP (B-type Natriuretic Peptide) levels are a common finding in CHF, including both right-sided and left-sided heart failure. This peptide is released by the ventricles in response to increased wall stress and fluid overload, thus it serves as a reliable marker for diagnosing heart failure. Similarly, cardiomegaly, or an enlargement of the heart, often appears on chest x-rays in patients with right-sided CHF, indicating the heart's compromised function.

Echocardiogram changes are also a significant diagnostic tool in assessing heart function and can reveal structural abnormalities or dysfunction in the right heart chambers, common in right-sided CHF.

On the other hand, decreased BNP levels are not characteristic of right-sided CHF. In fact, a decrease in BNP would typically indicate lesser heart strain or improved cardiac function. Therefore, identifying decreased BNP levels as a finding associated with right-sided CHF stands in opposition to the pathology associated with the condition, making it the correct choice as the option that does not align with common diagnostic findings.