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All ECG 9

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Source: Learn the Heart

The ECG shows normal sinus rhythm at 75 beats per minute with an unremarkable QRS complex. The QT-corrected (Fridericia) QT interval is prolonged at 528 msec, and the T waves are very prominent and globally inverted. 

During an acute intracranial process such as intracranial hemorrhage or after carotid endarterectomy, dramatic ECG changes may occur in the absence of cardiac pathology. These include deep inversion of the T waves and prolongation of the QT interval. The connection between the brain and heart is poorly understood. These ECG changes can be confused with Wellen's phenomenon, which may have similar T wave changes; however, the QT interval is usually normal with Wellen’s phenomenon.

Related: Prolonged QT Interval ECG ReviewWellens’ Syndrome ECG Review