Patients with rheumatic heart disease primarily exhibit symptoms of rheumatic myocarditis, pericarditis, or lesions of the mitral valve, aortic valve, and tricuspid valve including the pulmonary valve, with mitral stenosis being the most common. Generally, severe heart disease can impair the heart's pumping ability, leading to insufficient blood supply to the brain, causing dizziness. Some individuals with mitral stenosis may experience an enlargement of the atrium, leading to atrial fibrillation. Once atrial fibrillation occurs, the left atrial appendage can form blood clots, increasing the risk of clot detachment. If a clot detaches, it can pass directly through the right ventricle into the cerebral arteries, causing a major artery embolism that results in dizziness. In severe cases, this can lead to sudden death in patients.