Cobalt™ ICDs and CRT-Ds are enabled with BlueSync™ technology, allowing for tablet-based programming and app-based remote monitoring, and offer exclusive algorithms to manage atrial fibrillation (AF) patients. 

Additional Resources


the Future IS HERE

Meet Cobalt ICDs and CRT-Ds

With exclusive algorithms to manage AF, heart failure risk stratification (CRT-D), tablet-based programming and app-based remote monitoring, extended longevity, and 40 J on all shocks.


Extended Longevity

Real-world projections based on CareLink™ patient data. 

Graph depicting Cobalt's longevity projections against Claria and Amplia MRI devices
Graph depicting Cobalt Dual Chamber's longevity projections against Evera and Evera MRI Dual Chamber ICDs
Graph depicting Cobalt Single Chamber's longevity projections against Visia AF and Visia AF MRI Single Chamber

Increased Energy Delivery





40 J




47 J

Exclusive Algorithms to Manage AF 


Single Chamber

  • TruAF™ Detection Algorithm can detect AF in single
    chamber ICD patients using a traditional lead.

Dual Chamber and CRT-D

  • Highest published detection accuracy 95-96% episode PPV.§||7-10

AF Episode Detection Accuracy (PPV)<sup>§||10</sup>

Graph depicting AF detection accuracy in multiple devices


Dual Chamber and CRT-D

  • Reactive ATP™ opportunistically attempts to terminate an AF episode when the rhythm organises and/or slows. 
  • 36% relative reduction in AT/AF episodes ≥ 7 days with Reactive ATP Algorithm¶13
  • AdaptivCRT™ Algorithm adapts to patients’ changing needs by optimising CRT pacing minute-to-minute.
  • 46% reduction in AF risk with AdaptivCRT Algorithm#14


BlueSync technology within Cobalt enables secure, wireless communication.

CareLink SmartSync interface shown on tablet

Tablet-based CareLink SmartSync™ device manager

Image showing Cobalt ICDs and CRT-Ds with Bluetooth icon

Cobalt ICDs and CRT-Ds

Image of app and home communicator on white background

MyCareLink Heart™ mobile app or MyCareLink Relay™ Home Communicator

BeConnected service shown on desktop monitor

CareLink network and the BeConnected service


TriageHF™ in Cobalt CRT-D is a simplified, integrated heart failure risk assessment tool that alerts clinicians to clinically relevant changes in a patient’s status that may lead to a heart failure decompensation.

Patient’s risk level is
generated by assessing15:

  • OptiVol™
  • Patient Activity
  • AT/AF Burden
  • Ventricular Rate during AT/AF
  • % Ventricular Pacing
  • Shocks
  • Treated VT/VF
  • Night Ventricular Rate
  • Heart Rate Variability


Risk score

Risk of a HF hospitalisation in the next 30 days16

HIGHHazard Ratio 10x
MEDIUMHazard Ratio 2.1x
LOWNeg Pred Value 99.4%

System features & Exclusive Algorithms

Discover exclusive features and algorithms available in Cobalt ICDs and CRT-Ds.

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Image showing Cobalt XT ICDs

Additional resources 

Onyx ONE Clear Study Patient

Medtronic Academy

Find additional feature information along with a variety of educational resources and tools.

Visit Medtronic Academy

With AdaptivCRT™ programmed to BiV and LV.

Energy delivered at connector block into a 50 Ω ± 1% load.

Energy stored at charge end on capacitor.


A controlled, head-to-head study evaluating the comparative performance of device algorithms has not been done. AF detection accuracy rates determined from independent clinical trials are presented for reference.


Detection accuracy is compared using PPV, which is the percentage of all AT/AF episodes detected by the individual device detection algorithm that were adjudicated as true AT/AF.

Compared to matched control group.


Most of the reduction in AF occurred in subgroups with prolonged AV conduction at baseline and with significant left atrial reverse remodeling.



Medtronic Claria MRI™ Quad CRT-D SureScan™ and Amplia MRI™ Quad CRT-D SureScan™ Median Projected Service Life based on U.S. CareLink™ transmission data as of January 2019; UC201600236 EN.


Medtronic Cobalt™ HF Quad CRT-D MRI SureScan™ Model DTPB2QQ device manual (example).


Medtronic Evera MRI™ XT DR SureScan™ and Evera MRI™ S DR SureScan™ Median Projected Service Life based on U.S. CareLink™ transmission data as of January 2019; UC201600236 EN.


Medtronic Cobalt™ DR MRI SureScan™ Model DDPB3D4 device manual (example).


Medtronic Visia AF™ VR and Visia AF MRI™ VR SureScan™ Median Projected Service Life based on U.S. CareLink™ transmission data as of January 2019; UC201600236 EN.


Medtronic Cobalt™ VR ICD MRI SureScan™ Model DVPB3D4 device manual (example).


Sprenger M. Comparison of Manufacturer’s AT/AF Detection Accuracy across Clinical Studies. January 2015. Medtronic data on file.


Pürerfellner H, Gillis AM, Holbrook, Hettrick DA. Accuracy of atrial tachyarrhythmia detection in implantable devices with arrhythmia therapies. Pacing Clin Electrophysiol. July 2004;27(7):983-992.


Ziegler PD, et al. Accuracy of Atrial Fibrillation Detection in Implantable Pacemakers. Presented at HRS 2013 (PO02-08); Denver, CO.


Medtronic data on file. QADoc DSN026170, Version 2.0, “AT/AF Duration Performance Comparison.”


Kauffman ES, Israel CW, Nair GM, et al. Positive predictive value of device-detected atrial high-rate episodes at different rates and durations: an analysis from ASSERT. Heart Rhythm. August 2012;9(8):1241-1246. 


Nowak B, McMeekin J, Knops M, et al. Validation of dual-chamber pacemaker diagnostic data using dual-channel stored electrograms. Pacing Clin Electrophysiol. July 2005;28(7):620-629.


Crossley GH, Padeletti L, Zweibel S, Hudnall JH, Zhang Y, Boriani G. Reactive atrial-based antitachycardia pacing therapy reduces atrial tachyarrhythmias. Pacing Clin Electrophysiol. July 2019;42(7):970-979.


Birnie D, Hudnall H, Lemke B, et al. Continuous optimization of cardiac resynchronization therapy reduces atrial fibrillation in heart failure patients: Results of the Adaptive Cardiac Resynchronization Therapy Trial. Heart Rhythm. December 2017;14(12):1820-1825.


Medtronic CareLink™ Heart Failure Risk Status Technical Manual M945636A001 A.


Cowie MR, Sarkar S, Koehler J, et al. Development and validation of an integrated diagnostic algorithm derived from parameters monitored in implantable devices for identifying patients at risk for heart failure hospitalization in an ambulatory setting. Eur Heart J. August 2013;34(31):2472-2480.