Diagnostic Radiology (CT scans, Fluoroscopy, Mammograms, X-rays) - Standard Letter

Oct 22, 2026

Uploaded by miraaa_2004

Guidance for healthcare providers and Medtronic representatives on interference considerations for Medtronic implantable cardiac device systems during diagnostic radiology procedures. Covers computed axial tomography (CT/CAT), fluoroscopy, mammography, and X-rays, explaining when accumulated dose is typically non-harmful versus when direct exposure to the CT beam may cause oversensing. Provides patient management precautions, including magnet-based tachyarrhythmia detection suspension or programming asynchronous pacing, with instructions to restore device parameters after the procedure.

LanguageEnglish

CategoryHealthcare

FormatPDF

Pages3

Reading Time8 min

AccessFree to download

Diagnostic radiology scope

CT scan precautions

Fluoroscopy considerations

Post-procedure device parameter restoration

Diagnostic Radiology (CT scans, Fluoroscopy, Mammograms, X-rays) CRM Technical Services Standard Letter © Medtronic 2024 The guidance provided in this letter is for healthcare providers and Medtronic representatives and applies to the following Medtronic device models: Non MRI Conditional Device Model Name, Model Number, Description Protecta™ XT DR D314DRG Digital dual chamber implantable cardioverter defibrillator (DDE-DDDR) Protecta™ XT DR D314DRM Digital dual chamber implantable cardioverter defibrillator (DDE-DDDR) Protecta™ XT CRT-D D314TRG Digital implantable cardioverter defibrillator with cardiac resynchronization therapy (DDE-DDDR) Protecta™ XT CRT-D D314TRM Digital implantable cardioverter defibrillator with cardiac resynchronization therapy (DDE-DDDR) Protecta™ XT VR D314VRG Digital single chamber implantable cardioverter defibrillator (VVE-VVIR) Protecta™ XT VR D314VRM Digital single chamber implantable cardioverter defibrillator (VVE-VVIR) Protecta™ DR D334DRG Digital dual chamber implantable cardioverter defibrillator (DDE-DDDR) Protecta™ DR D334DRM Digital dual chamber implantable cardioverter defibrillator (DDE-DDDR) Protecta™ CRT-D D334TRG Digital implantable cardioverter defibrillator with cardiac resynchronization therapy (DDE-DDDR) Protecta™ CRT-D D334TRM Digital implantable cardioverter defibrillator with cardiac resynchronization therapy (DDE-DDDR) Protecta™ VR D334VRG Digital single chamber implantable cardioverter defibrillator (VVE-VVIR) Protecta™ VR D334VRM Digital single chamber implantable cardioverter defibrillator (VVE-VVIR) SECURA™ DR D204DRM Digital dual chamber implantable cardioverter defibrillator (DDE-DDDR) CONSULTA® CRT-D D204TRM Digital implantable cardioverter defibrillator with cardiac resynchronization therapy (DDE-DDDR) SECURA™ DR D224DRG Digital dual chamber implantable cardioverter defibrillator (DDE-DDDR) CONSULTA® CRT-D D224TRK Digital implantable cardioverter defibrillator with cardiac resynchronization therapy (DDE-DDDR) SECURA™ VR D224VRC Digital single chamber implantable cardioverter defibrillator (VVE-VVIR) VIRTUOSO® II DR D274DRG Digital dual chamber implantable cardioverter defibrillator (DDE-DDDR) CONCERTO® II CRT-D D274TRK Digital implantable cardioverter defibrillator with cardiac resynchronization therapy (DDE-DDDR) VIRTUOSO® II VR D274VRC Digital single chamber implantable cardioverter defibrillator (VVE-VVIR) SECURA™ VR D204VRM Digital single chamber implantable cardioverter defibrillator (VVE-VVIR) This Standard Letter addresses Diagnostic radiology (CT scans, fluoroscopy, mammograms, x-rays): Diagnostic radiology refers to the following medical procedures: • Computed axial tomography (CT or CAT scan) • Fluoroscopy (an x-ray procedure that makes it possible to see internal organs in motion by producing a video image) • Mammograms • X-rays (radiography, such as chest x-rays) Normally, the accumulated dose from diagnostic radiology is not sufficient to damage the device. If the device is not directly exposed to the radiation beam, no risk of interference with device operation occurs. However, if the device is directly in a CT scan beam, see the following precautions in “CT scan”. Similar interference may be observed for some forms of high-intensity fluoroscopy. CT scan – A CT scan is a computerized process in which two-dimensional x-ray images are used to create a three-dimensional xray image. If the device is not directly in the CT scan beam, the device is not affected. If the device is directly in the CT scan beam, oversensing may occur for the duration of time the device is in the beam. If the device will be in the beam for longer than 4 s, to avoid or mitigate the effects of oversensing, if appropriate for the patient, initiate asynchronous pacing by implementing one of the following precautions: • Suspend tachyarrhythmia detection by using a magnet or a programmer. After completing the CT scan, remove the mag

FAQs

What should be done after completing a CT scan?

After completing the CT scan, remove the magnet or restore device parameters. Restore device parameters to the intended configuration before ongoing patient management continues.

Oct 22, 2026

Uploaded by miraaa_2004