Hi,
How are you? Even with no previous physical evidence of heart damage, the diagnosis of congestive heart failure is most often a clinical one. This includes the patient's complete medical history, physical examination, and selected laboratory tests such as ECG, chest x-ray and nuclear medicine studies which assess the overall pumping capability of the heart and examine the possibility of inadequate blood flow to the heart muscle. Heart catheterization, as mentioned from the above post,may also be done to visualize the arteries to the heart with angiography. The choice of tests actually depends on each patient's case and is based on the suspected diagnoses. Discuss this with your doctor and decide which test you can take. Take care and best regards.
You have a right to refuse any kind of medical procedure, and your doctor is supposed to respect that. However, don't be surprized if your doctor loses interest in your case. It's not supposed to make a difference, but it does.
I was scheduled for a chemical stress test last November. Before the test the tech called and instructed me not to take my medication the night before, or the next morning. I never made it to the stress test, but ended up on the hospital with a heart attack, via Life Flight helicopter. While in the hospital they did a heart cath, and they got the information they were looking for, so the stress test was round filed.
Perhaps you could mention doing a heart cath. It's not a pleasant experience, though, and requires at least a day in the hospital.
My point....there are other methods, besides a stress test, to determine the condition of your heart, so you do have a choice.