Hi @kisekishiawase - I am sorry you are experiencing such uncomfortable and frightening symptoms. I know how stressful it can be and that is not going to help. I lack expertise to truly answer your question. I am only reporting from my experience with being very symptomatic in different ways at different times, but no matter what the cardiac symptoms or how acute they were, not even during a period of low grade infection, over a period of several years my echos were always normal. Did you take a look at the link Gondwanaland posted above? (this) It offers some good information for evaluating your symptoms from the perspective of mineral balance. Except where there is a clear endocrinological or other cause, doctors are not likely to want to investigate beyond one or two general tests unless you can persuade them with some kind of evidence, why they should. This information is written for the general public and represents the standard approach to evaluating myocarditis: http://www.myocarditisfoundation.org/about-myocarditis/ - An Electrocardiogram Electrical activity of your heart is detected by electrodes taped to your skin. This activity is recorded as waves that represent the electrical forces in the different parts of the heart. A Chest X-Ray A chest X-ray produces an image on film that outlines your heart, lungs and other structures in your chest. From a chest X-ray, your physician learns information such as the size and shape of your heart. An Echocardiogram (abbreviated echo) Sound waves (too high-pitched to be heard) are used to make an image of your heart or analyze blood flow. The sound waves are sent into your body from a transducer, a small plastic device. The sound waves are reflected back from internal structures, returning to the transducer and producing images of the heart and its structures. Less frequently, a cardiac magnetic resonance imaging (MRI) scan may be done to diagnose myocarditis. An MRI creates images using a magnetic field and radio waves. Occasionally, a heart biopsy is required to confirm the diagnosis. My impression is that most cardiac testing is designed for cardiovascular-related problems, and in the case of certain kinds of heart failure, the interpretation or test methods are skewed in the direction of signs of it in men rather than women. Other tests tend to be mostly useful for long-standing and acute presentations, so unless you present in an acute state in ER - preferably unconscious if you want a diagnosis, it can be difficult to get necessary tests when (inappropriate) preliminary ones are normal and are used as a reason for no further testing. If you are experiencing symptoms that without a diagnosis and treatment will eventually lead to structural damage to the heart that has not yet happened, even tests to diagnose structural damage are more likely to appear normal. Not being able to be tested during worst symptoms may be one of the problems. Have you used a Holter? That did not show anything for me, but I recall not being symptomatic during the time I was using it. Maybe it would have made a difference. Regardless of the cause, getting the minerals you need and electrolytes balanced can help prevent things from getting worse and maybe even improve or resolve your worst symptoms, so I would still consider that as a starting point while waiting to see any doctors you might choose to see.