Emergency Medical Technician-Defibrillator is another step in the 

  advancement of patient care.  EMT-D's are well versed in all the 

  skills of the EMT.  With another 75 hours of classroom learning and

  clinical training an EMT-D has a greater understanding of 

  cardiovascular anatomy, physiology and pathophysiology.  This 

  allows EMT-D's to monitor EKG rhythms and defibrillate patients 

  in cardiac arrest.  This certification may be accompanied by the 

  EMT-I certification.