EKG Fileroom Case 9

Diagnosis: Dextrocardia

Discussion: Notice that the P, QRS, and T are all inverted in lead I, since septal and LV free wall depolarization are now opposite normal. In fact Lead I almost looks like V1. Also notice the decreasing R wave amplitude from V1 to V6, since now LV free wall depolarization points away from lat leads. It is important to note that switched limb leads can cause lead I to look like it does in dextrocardia, but switched limb leads will not cause decreasing R wave amplitude in leads V1 to V6

Hit the Menu button at the top of the screen to return to the menu page.
Note: The explanations contained here are based upon my own understanding of Electrophysiology as a 4th year medical student. I am pretty sure I am right, but if you have more to add, comments, questions or corrections please email me.