Yes: The heart is a very dynamic organ. Any evaluation is only accurate during the test. For instance heart failure can be very dependent on extra fluid in your body. If the test was done when fluid volume is low then it may not be worrisome. But the next day after eating too much salty food then your volume increases and now your heart shows signs of failure. Fortunately this doesn't happen a lot.
Answered 3/28/2013
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