Fatigue,loss Of Appetite,cardiac Echo,kidney Sonogramed,heart Failure?
Thanks for posting your query. There are many causes of loss of appetite and fatigue and beginning of heart failure is one of the reasons. But since you have got a checkup done from a cardiologist and ECHO has come out normal , so it literally rules out a heart failure.
ECHO is one of the best sensitive tests for any heart disease and if it has come out normal, then chances of a heart disease are reduced considerably. To completely rule out a cardiac condition, holter monitor, cardiac stress test and a nuclear scan can be done.
I also suggest you to consult a physician and get other conditions causing fatigue and loss of appetite ruled out. These include depression, hypothyroidism, dysthymia (a chronic type of depression in which a person's moods are regularly low), sleep disorders, autoimmune diseases like SLE, diabetes and fibromyalgia.
Hope this answers your query. If you have additional questions or follow up queries then please do not hesitate in writing to us. I will be happy to answer your queries.
Wishing you good health and waiting for your follow up questions.