Editing T wave (section)

=== Biphasic T wave ===
As the name suggests, Biphasic T waves move in opposite directions. The two main causes of these waves are myocardial ischemia and hypokalemia. 
* Ischemic T waves rise and then fall below the cardiac resting membrane potential
* Hypokalemic T waves fall and then rise above the cardiac resting membrane potential 
Wellens' Syndrome is a pattern of biphasic T waves in V2–3. It is generally present in patients with ischemic chest pain.
* Type 1: T-waves are symmetrically and deeply inverted 
* Type 2: T-waves are biphasic with negative terminal deflection and positive initial deflection <ref name="Hanna 2011"/>