how serious is a heart problem, that a cardiologist is refering my daughter to another cardiologist for elctro phisiologist test and what is albation to get rid of heart blockages with mitral valve regurgitation, also another valve is affected and this all started with rheumatic fever./ Symptoms, include rapid herat rate , feel like its beating hard out of her chest, , syncopal episodes andshortness of breath. also what is proliferation of the heart, all seen on echocardiogram, stress test , and ekg/ and the injection of dye into the vein to check the heart and 24 hr heart monitor. she has been referred to Dr. Massey in Chapel Hill, NC.