see also: [[Pacemaker issues]] , [[Cardiac Resynchronization Therapy|CRT]] see: [Cardiac intensive care ICD](x-devonthink-item://C5BE7A05-6B49-44F9-A896-007551DBE78A?page=319) , [ICD and sudden cardiac death](x-devonthink-item://A5C59229-8B00-489C-B53B-AB2891FC64C8) ICDs terminate VT by ==antitachycardia pacing== (ATP) or delivery of a cardioversion shock if ATP is not effective, but do not prevent VT occurrences. # Method ![[Pasted image 20230827222626.png]] ICD treatment of ventricular tachycardias (VT). A, Initiation of sustained polymorphic VT by a premature ventricular complex is followed by burst pacing from an implanted defibrillation, which fails to terminate the VT, although the QRS becomes more organized. B, VT continues and the ICD delivers a shock that converts the rhythm to sinus. # ICD shocks ![[Pasted image 20230827223803.png]]