On November 1 had nuclear scan of heart to determine if protein transthyretin present in my heart. Presence of this protein causes heart to become thicker and ultimately weaker. Condition called amyloidosis. Symptoms include fatigue, shortness of breath, abdominal and leg swelling etc. Treatment is what I am undergoing now. Diuretics, blood thinner and treatment for heart arrhythmia. I am also on Entresto which has been helpful. Any others out there with amyloidosis?