Pathogenesis of Rheumatic Fever | Rheumatic Heart Disease 🧑🏻⚕️
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- Опубліковано 7 чер 2024
- #drnajeeb #medicines #medicaleducation #drnajeeblectures #cardiology #streptococcus
Pathogenesis of Rheumatic Fever | Rheumatic Heart Disease 🧑🏻⚕️
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▬▬▬▬▬▬▬▬▬▬ Contents of this video ▬▬▬▬▬▬▬▬▬▬
00:00:00 Introduction
00:00:47 Pathology
00:01:20 a) Streptococci
00:02:50 b) Rheumatogenic strains
00:03:20 c) Immune system
00:05:32 d) Response by immune system
00:08:14 e) Why immune system attacks own tissues
00:11:00 How much time is required to respond from immune system
00:12:47 What is Rheumatic fever and its time frame
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Rheumatic fever (RF) is an inflammatory disease that can involve the heart, joints, skin, and brain. The disease typically develops two to four weeks after a streptococcal throat infection. Signs and symptoms include fever, multiple painful joints, involuntary muscle movements, and occasionally a characteristic non-itchy rash known as erythema marginatum. The heart is involved in about half of the cases. Damage to the heart valves, known as rheumatic heart disease (RHD), usually occurs after repeated attacks but can sometimes occur after one. The damaged valves may result in heart failure, atrial fibrillation and infection of the valves.
Rheumatic fever may occur following an infection of the throat by the bacterium Streptococcus pyogenes. If the infection is left untreated, rheumatic fever occurs in up to three percent of people. The underlying mechanism is believed to involve the production of antibodies against a person's own tissues. Due to their genetics, some people are more likely to get the disease when exposed to the bacteria than others. Other risk factors include malnutrition and poverty. Diagnosis of RF is often based on the presence of signs and symptoms in combination with evidence of a recent streptococcal infection.
Treating people who have strep throat with antibiotics, such as penicillin, decreases the risk of developing rheumatic fever. In order to avoid antibiotic misuse this often involves testing people with sore throats for the infection; however, testing might not be available in the developing world. Other preventive measures include improved sanitation. In those with rheumatic fever and rheumatic heart disease, prolonged periods of antibiotics are sometimes recommended. Gradual return to normal activities may occur following an attack. Once RHD develops, treatment is more difficult. Occasionally valve replacement surgery or valve repair is required. Otherwise complications are treated as usual.
Valvular heart disease is any cardiovascular disease process involving one or more of the four valves of the heart (the aortic and mitral valves on the left side of heart and the pulmonic and tricuspid valves on the right side of heart). These conditions occur largely as a consequence of aging, but may also be the result of congenital (inborn) abnormalities or specific disease or physiologic processes including rheumatic heart disease and pregnancy.
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Thanks again for today's lecture🙏. Only macrophages for presenting the antigen? No other professional presenting cells ? Also, can any of the innate arm immune systems help while the B & T cells are getting primed ? 🤔 Thanks again
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