 [ Symptoms ] why can not i gain any weight  i am nursing an 11 month old but i am not totally sure if thats the only reason i can not keep my weight over 100 pounds before i got pregnant i was never this thin and i am constantly eating [ Disease ] the american heart association guidelines have changed only the people at the greatest risk for bad outcomes from infective endocarditis    an infection of the heart valves    should receive short term preventive antibiotics before common routine dental and medical procedures i generally request that patients have a screening by a cardiologist and a specific recommendation to go along with it