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Rheumatic Heart Disease III: Medical Management01:21

Rheumatic Heart Disease III: Medical Management

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Rheumatic heart disease (RHD) management can be divided into two main strategies: prevention and long-term management.Primary PreventionPrimary prevention focuses on timely diagnosis and management of group A streptococcal pharyngitis to prevent acute rheumatic fever. The most widely used antibiotic for treating this condition is intramuscular benzathine penicillin G.Acute Rheumatic Fever TreatmentThe primary treatment goal for a patient diagnosed with acute rheumatic fever is to suppress the...
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Rheumatic heart disease or RHD is a chronic condition that results from rheumatic fever, causing permanent damage to the heart valves.Etiology and Risk FactorsIt primarily arises from rheumatic fever, an inflammatory disease that can develop after untreated or inadequately treated group A streptococcal (GAS) pharyngitis. Streptococcus spreads through direct contact with oral or respiratory secretions. While the bacteria are the causative agents, factors like malnutrition, overcrowding, poor...
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Rheumatic Heart Disease II: Clinical Manifestations and Diagnostic Studies01:22

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The key clinical manifestations of Rheumatic heart disease (RHD) include several distinct cardiac symptoms.Carditis, a hallmark of acute rheumatic fever, involves inflammation of the heart's endocardium, myocardium, and pericardium. Chronic RHD often results from recurrent episodes of carditis. Its symptoms include the following:Murmurs are caused by valvular damage, especially to the mitral and aortic valves. Mitral stenosis or regurgitation is common, with characteristic heart murmurs...
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AssessmentA comprehensive assessment is essential in managing a patient with rheumatic heart disease (RHD). Begin with obtaining a detailed medical history, including recent streptococcal infections, a history of rheumatic fever, or previously diagnosed rheumatic heart disease. Assess the patient for symptoms such as fever, chest pain, widespread joint pain (arthralgia), tachycardia, pericardial friction rub, muffled heart sounds, heart murmurs, peripheral edema, subcutaneous nodules, and...
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Oral anticoagulants are vital tools in preventing and treating blood clotting disorders. This diverse class of medications can be categorized as vitamin K antagonists, exemplified by warfarin, and direct thrombin inhibitors (DTIs), such as dabigatran, as well as factor Xa inhibitors, including rivaroxaban.
Warfarin, a prominent vitamin K antagonist family member, exerts its effect by inhibiting the enzyme VKORC1 (vitamin K epoxide reductase complex 1). By hindering this enzyme, warfarin...
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Hemostasis is a crucial process that prevents excessive blood loss from damaged blood vessels. It involves various mechanisms such as vasoconstriction, platelet adhesion and activation, and fibrin formation. The importance of each mechanism depends on the type of vessel injury. In contrast, thrombosis is the abnormal formation of a blood clot within the blood vessels, leading to potential complications if the clot obstructs blood flow. Thrombosis can be caused by increased coagulability of the...
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Rivaroxaban in Rheumatic Heart Disease-Associated Atrial Fibrillation.

Stuart J Connolly1, Ganesan Karthikeyan1, Mpiko Ntsekhe1

  • 1From the Population Health Research Institute, McMaster University, Hamilton, ON, Canada (S.J.C., A.B., A.K., D.P., K.B., S.R., C.R., S.Y.); the All India Institute of Medical Sciences, New Delhi (G.K.); the Division of Cardiology, Faculty of Health Sciences, University of Cape Town (M.N., B.M.), and the South African Medical Research Council (L.Z.) - both in Cape Town, South Africa; Jimma University Medical Center, Jimma, Ethiopia (A.H.); the University of Gazira, Wad Madani, Sudan (A.E.S.); Mahalla Heart Center, El Mahalla El Kubra (A.E.G.), and Suez Canal University Hospital, Ismailia (F.M.) - both in Egypt; the Faculty of Medicine, Eduardo Mondlane University, Maputo, Mozambique (A.D.); the International Research Center, Hospital Alemão Oswaldo Cruz, São Paulo (A.A.); the College of Medicine, University of the Philippines, Manila (A.M.L.D.); Kenyatta National Hospital, Nairobi (B.G.); the People's Hospital of Peking University (D.H.) and the Beijing Anzhen Hospital (C.M.) - both in Beijing; the University Teaching Hospital of Kigali, Kigali, Rwanda (E.R.K.); the University of Zimbabwe, College of Health Sciences, Harare (G.F.); Instituto Nacional de Cardiología Ignacio Chávez, Mexico City (J.A.G.-H.); the University Teaching Hospital, Lusaka, Zambia (J.M.); the National Institute of Cardiovascular Diseases, Karachi, Pakistan (K.K.); Kamuzu Central Hospital, Lilongwe, Malawi (L.G.); Barrio Obrero Hospital, Asuncion, Paraguay (M.P.); the Department of Medicine, University of Ibadan-College Hospital, Ibadan, Nigeria (O.S.O.); Princess Marina Hospital, University of Botswana, Gaborone (O.J.M.-B.); Uganda Heart Institute, Kampala (P.L.); Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania (P.C.); the B.P. Koirala Institute of Health Sciences, Dharan, Nepal (S.K.S.); St. Elizabeth Catholic General Hospital, Kumbo, Cameroon (T.T.J.C.); the Department of Medicine, University of Saskatchewan, Saskatoon, the Department of Medicine, Western University, London, ON, and the Windsor Cardiac Centre, Windsor, ON - all in Canada (W.M.T.); the Department of Cardiology, Cardiology I, University Medical Center Mainz, Johannes Gutenberg University, Mainz (A.B.), and Bayer, Berlin (M.E.) - both in Germany.

The New England Journal of Medicine
|August 29, 2022
PubMed
Summary
This summary is machine-generated.

Vitamin K antagonist therapy demonstrated superior outcomes compared to rivaroxaban for preventing cardiovascular events in patients with rheumatic heart disease-associated atrial fibrillation. No increased bleeding risk was observed with vitamin K antagonists.

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Area of Science:

  • Cardiology
  • Pharmacology
  • Clinical Trials

Background:

  • Limited data exists on factor Xa inhibitors for preventing cardiovascular events in patients with rheumatic heart disease-associated atrial fibrillation.
  • Rheumatic heart disease significantly increases stroke risk in patients with atrial fibrillation.

Purpose of the Study:

  • To compare the efficacy and safety of rivaroxaban versus vitamin K antagonists in patients with rheumatic heart disease-associated atrial fibrillation.
  • To evaluate the noninferiority of rivaroxaban to vitamin K antagonists in reducing cardiovascular events.

Main Methods:

  • Patients with atrial fibrillation and rheumatic heart disease were randomized to receive rivaroxaban or dose-adjusted vitamin K antagonist.
  • Inclusion criteria included CHA2DS2-VASc score ≥2, mitral-valve area ≤2 cm², left atrial spontaneous echo contrast, or left atrial thrombus.
  • Primary efficacy outcome was a composite of stroke, systemic embolism, myocardial infarction, or death; primary safety outcome was major bleeding.

Main Results:

  • Vitamin K antagonist therapy resulted in a significantly lower rate of the composite primary efficacy outcome (restricted mean survival time difference: -76 days; 95% CI, -121 to -31).
  • A higher incidence of death occurred in the rivaroxaban group (restricted mean survival time difference: -72 days; 95% CI, -117 to -28).
  • No significant difference in the rate of major bleeding was observed between the two groups.

Conclusions:

  • Vitamin K antagonist therapy was more effective than rivaroxaban in reducing cardiovascular events and death in patients with rheumatic heart disease-associated atrial fibrillation.
  • Vitamin K antagonists provided this benefit without an increased risk of major bleeding.