http://www.cfids-cab.org/MESA/DrMyhill-373.pdf
Heart failure in ME is caused by poor muscle function.
Traditional tests like ECG, ECHO's, angiograms, ... will be normal.
Impedence cardiography however accurately measure cardiac output by measuring the electrical impedence across the chest wall.
Do the test in upright position and then again supine.
Disability can be proven with this test. It is completely independent and reliable.
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