Treatment of choice for late cardiovascular syphilis is?
**Core Concept**
Late cardiovascular syphilis is a complication of untreated syphilis infection, occurring years or even decades after the initial infection. It is characterized by damage to the aortic valve and/or the aorta, leading to aortic regurgitation or aneurysm formation. The treatment of choice aims to eliminate the causative organism, Treponema pallidum.
**Why the Correct Answer is Right**
The treatment of choice for late cardiovascular syphilis is penicillin, specifically a long-acting preparation such as benzathine penicillin G. This is because penicillin is effective against Treponema pallidum and can penetrate into the affected tissues. The recommended dose is 2.4 million units of benzathine penicillin G administered intramuscularly once a week for 3 weeks. This regimen is effective in eliminating the infection and preventing further damage to the cardiovascular system.
**Why Each Wrong Option is Incorrect**
**Option A:** Other antibiotics such as doxycycline or ceftriaxone may be used as alternatives in patients with penicillin allergy, but they are not the first-line treatment for late cardiovascular syphilis.
**Option B:** Corticosteroids are not effective in treating syphilis and may even worsen the condition by suppressing the immune response.
**Option C:** Anticoagulants are not indicated in the treatment of late cardiovascular syphilis, as they do not address the underlying cause of the condition.
**Clinical Pearl / High-Yield Fact**
It is essential to note that late cardiovascular syphilis can occur even in patients who have not received any prior treatment for syphilis. Therefore, a thorough medical history and serological testing are crucial in diagnosing this condition.
**Correct Answer:** C.