Your diagnosis and treatment will require quite a few tests.  Those listed below are some of the most common, but are by no means the only tests you will be given.

EKG:  This test is painless and is conducted through the application of small sensors which will measure the electric function of your heart.

Echocardiogram: Also painless, the echocardiogram or Echo uses sound waves to see inside your body to your heart.  It can measure the size and contractability of your heart.  The results of this test will give you that all-important ejection fraction or EF that many women on this site talk about.  Doctors consider an EF of 50% or above to be normal or healed.

MUGA Scan:  In this test, a radioactive dye is injected and it's progress is tracked through X-rays.  A MUGA Scan is generally considered more accurate than an Echo.

Angiogram: This test is similar to a Muga but it is used to detect any blockages that might have occured in the arteries of your heart.  It does require you to lie flat for several hours following the test, but I found it painless and actually quite fascinating.

Blood tests:  In the beginning, blood tests might be used to detect infections, enemia, hypoglycemia or diabetes.  They are also used throughout your treatment to check the levels of some medications and nutrients in your body.  They also detect any problems that might exist in your kidneys or liver.

Chest X-ray:  Some of us were taken to the emergency room because we couldn't breathe.  This was because the fluid had backed up into our lungs.  Doctors will use chest x-rays to check the severity of this pulmonary edema and to track your progress as you eliminate that fluid.  Don't be alarmed if you seem to have an x-ray every day in the beginning.  It's imperative that the doctors know how much fluid remains in your lungs.