DiamondTemp™ Ablation System
with RealTemp™
for Real-time, Temperature-controlled Ablation 

As the only open-irrigated RF catheter with industrial diamonds to optimize power based on tissue surface temperature, the DiamondTemp ablation system (DTA) with RealTemp is safe and effective, and has demonstrated procedural efficiencies compared to contact force-sensing RF.1

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The Next Generation of RF Ablation

Product features

Exclusive diamond-enabled  Tip tooling

The 8.0 Fr ablation catheter includes industrial diamonds, enabling rapid cooling due to their high thermal diffusivity property. The catheter tip is comprised of platinum-iridium and diamond components. A network of chemical vapor deposit (CVD) industrial diamonds acts as heat-shunting material.

  1. Distal diamond
  2. Center diamond
  3. Proximal diamond

Illustration of the inside of DiamondTemp ablation system catheter with callouts

Exclusive diamond shunt network enables rapid catheter tip cooling and a low-flow irrigation rate of 8 ml/min.2

  • Thermal energy transfer is 200–400x faster with CVD diamond versus platinum-iridium.3,4
  • Extremely high thermal diffusivity allows quick conduction of thermal energy through the diamond shunt network, enabling a low-flow irrigation rate and EGM signal clarity.2

Real-time temperature-sensing technology

Temperature provides direct feedback on lesion creation. Irreversible tissue damage is created at temperatures > 50° C.5

  • The DiamondTemp ablation system runs in temperature-control mode.
  • RealTemp drives thermocouple readings by the generator 50 times per second and automatically adjusts the power to the ablation set temperature.
  • A new study shows that through operation in temperature control mode, the level of applied contact force does not influence lesion size for durations between 5–15 seconds.6
DiamondTemp ablation system catheter tip on transparent background

Precise location guidance with Localized EGMs

A high-resolution electrode (HRE) at the catheter tip allows for the recording of highly localized signals at the center of ablation with minimal far-field artifact.2

Conventional RF catheter on blue background

Conventional Electrodes

Bipolar mapping/pacing

DiamondTemp ablation system catheter and electrodes on blue background

Hi-res Electrodes

Bipolar mapping/pacing

Clinical data

Diamond-AF clinical trial1

Comparing the DiamondTemp ablation system versus a contact force-sensing ablation system (CF-RF).

View clinical data


Discover the DiamondTemp Difference

Watch as four experienced EPs share how the DiamondTemp ablation system uses direct tissue surface temperature measurement to create effective lesions.

Contact Force Assessment

Watch Usman Siddiqui, M.D., FHRS share his assessment on contact force using the DiamondTemp ablation catheter.

System specifications

The 8.0 Fr open-irrigated catheter features a 4.1 mm tip segment consisting of six externally placed temperature-sensing thermocouples, a dual composite tip electrode, two ring electrodes, and six irrigation ports.

Includes customized offerings:

  • Small and large curve configurations
  • Unidirectional and bidirectional models

  1. 2.0 mm
  2. 3.5 mm
  3. 4.1 mm
  4. 3x Distal Thermocouples
  5. 6x Irrigation Ports 
  6. Distal RF Electrode — 0.6 mm
  7. Distal Diamond — 0.5 mm
  8. Proximal RF Electrode — 3.0 mm
  9. 3x Proximal Thermocouples
10. Proximal Diamond
11. Distal Ring Electrode
12. Proximal Ring Electrode

DiamondTemp ablation system catheter tip detail with callouts

Additional resources

Resources on



Access detailed product information, including spec sheets, videos, and presentations.

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Kautzner J, Albenque JP, Natale A, et al. A Novel Temperature-Controlled Radiofrequency Catheter Ablation System Used to Treat Patients With Paroxysmal Atrial Fibrillation. JACC Clin Electrophysiol. 2021;7(3):352-363.


Avila C. DiamondTemp Catheter Design. Medtronic data on file, January 2021.


Brown A, Marco S. Introduction to Heat Transfer. Third edition. McGraw Hill; 1958.


Eckert ERG, Drake RM. Heat and Mass Transfer. Cited in: Holman JP. Heat Transfer. Ninth edition. McGraw Hill; 2002.


Nath S, DiMarco JP, Haines DE. Basic aspects of radiofrequency catheter ablation. J Cardiovasc Electrophysiol. 1994;5(10):863-876.


Verma A, Schmidt MM, Lalonde JP, Ramirez DA, Getman MK. Assessing the Relationship of Applied Force and Ablation Duration on Lesion Size Using a Diamond Tip Catheter Ablation System. Circ Arrhythm Electrophysiol. 2021;14(7):e009541.