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<p>with an <a href="page.php?w=Electrocardiography">electrocardiogram</a> (i.e. a picture of the electrical activity of the heart) and by measuring a hormone called <a href="page.php?w=troponin">troponin</a>, which is released from the heart tissue during times of stress on the tissue.</p>

<p><big>Causes</big></p>
<p>Panic attacks can be caused by a mix of factors. Biological factors that may lead to or be caused by panic attacks include psychiatric disorders such as <a href="page.php?w=post-traumatic_stress_disorder">post-traumatic stress disorder</a> (PTSD)</p><p>
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