Study on characteristic arrhythmias by 24 - hour electrocardiographic Holter in patients with chronic mitral regurgitation

To investigate arrhythmias in patients with primary chronic mitral regurgitation by using a 24 - hour ECG Holter and to evaluate the association between arrhythmias and the degree of mitral valve regurgitation, left atrial diameter, degree of NYHA, left ventricular ejection fraction (LVEF%).