text: Most potent risk factors for the development of<unk>  regurgitation may include pulmonary hypertension, surgical repair of teratology of Fallot, and congenital heart diseases. Less common but important risk factors include endocarditis, left sided heart disease, previous Ross procedure, collagen vascular disease, and malignancies involving the main pulmonary artery.
option_0: Pulmonic regurgitation risk factors
option_1: Tricuspid stenosis risk factors
option_2: Bicuspid aortic stenosis risk factors
option_3: Tricuspid regurgitation risk factors
option_4: Aortic regurgitation risk factors
option_5: Mitral stenosis risk factors
option_6: Left ventricular aneurysm risk factors
option_7: Constrictive pericarditis risk factors