Features of rheumatic carditis are all except ?
**Core Concept**
Rheumatic carditis is an inflammatory process that affects the heart in the context of acute rheumatic fever (ARF), a complication of untreated or inadequately treated group A beta-hemolytic streptococcal (GABHS) pharyngitis. It involves the endocardium, myocardium, and pericardium, leading to various clinical manifestations.
**Why the Correct Answer is Right**
Rheumatic carditis is characterized by the presence of Aschoff bodies, which are granulomatous lesions composed of collections of immune cells, including macrophages, lymphocytes, and giant cells, along with the presence of Anitschkow cells, which are histiocytes with a characteristic appearance. The inflammation can lead to valvular damage, leading to rheumatic heart disease (RHD). In addition, rheumatic carditis can cause myocarditis, resulting in impaired cardiac function.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as it does not represent a feature of rheumatic carditis. While Aschoff bodies are indeed a hallmark of rheumatic carditis, the statement is incomplete and does not accurately describe the disease process.
**Option B:** This option is incorrect as it is not a characteristic of rheumatic carditis. Rheumatic carditis is not typically associated with the presence of rheumatoid factor, which is an antibody that is often found in rheumatoid arthritis.
**Option C:** This option is incorrect as it does not accurately represent a feature of rheumatic carditis. While valvular damage is a potential consequence of rheumatic carditis, the statement is too broad and does not specifically describe the disease process.
**Option D:** This option is incorrect as it is not a characteristic of rheumatic carditis. While myocarditis can be a consequence of rheumatic carditis, the statement is too vague and does not accurately describe the disease process.
**Clinical Pearl / High-Yield Fact**
In patients with ARF, the presence of a new or changing heart murmur, along with symptoms such as fever, joint pain, and rash, should raise suspicion for rheumatic carditis. Prompt recognition and treatment of ARF can prevent the development of RHD.
**Correct Answer:** B.