Overdose

EKG Challenge No. 15: Too Much Ibuprofen?

Paramedics bring in a 29 year old male with a history of depression and alcohol abuse for a reported ibuprofen ingestion of unknown quantity as a suicide attempt.  The patient initially was somnolent and admitted to alcohol use, but while being transported suddenly had a generalized tonic-clonic seizure.  Paramedics quickly administer IV diazepam for the resolution of seizure activity, and he is post-ictal on arrival to the ED.  Blood pressure is 98/60 with an irregularly irregular heart rate of 62 on the monitor.  He has no history of seizures or cardiac disease in his records.  His 12-lead EKG shows this:  

How would you describe the EKG?  Can you make a diagnosis from this EKG?  What would you do next?