Disclosure:

Medtronic AT500™ Pacing System
Indications

The Medtronic AT500 Pacing System is indicated for the following:

• Rate adaptive pacing in patients who may benefit from increased pacing rates concurrent with increases in activity.
• Accepted patient conditions warranting chronic cardiac pacing which include:
  • Symptomatic paroxysmal or permanent second- or third-degree AV block.
  • Symptomatic bilateral bundle branch block.
  • Symptomatic paroxysmal or transient sinus node dysfunctions with or without associated AV conduction disorders.
  • Bradycardia-tachycardia syndrome to prevent symptomatic bradycardia or some forms of symptomatic tachyarrhythmias

The Medtronic AT500 system is also indicated for dual chamber and atrial tracking modes in patients who may benefit from maintenance of AV synchrony. Dual chamber modes are specifically indicated for treatment of conduction disorders that require restoration of both rate and AV synchrony, which include:

• Various degrees of AV block to maintain the atrial contribution to cardiac output.
• VVI intolerance (e.g., pacemaker syndrome) in the presence of persistent sinus rhythm.

Antitachycardia pacing (ATP) is indicated for termination of atrial tachyarrhythmias in bradycardia patients with one or more of the above pacing indications.

Atrial rhythm management features such as Atrial Rate Stabilization (ARS), Atrial Preference Pacing (APP), and Post-Mode Switch Overdrive Pacing (PMOP) are indicated for the suppression of atrial tachyarrhythmias in bradycardia patients with atrial septal lead placement and one or more of the above pacing indications.

Contraindications

The Medtronic AT500 Pacing System is contraindicated for :

• Implantation with unipolar pacing leads.
• Concomitant implantation with another bradycardia device.
• Concomitant implantation with an implantable cardioverter defibrillator.
• There are no known contraindications for the use of pacing as a therapeutic modality to control heart rate. The patient's age and medical condition, however, may dictate the particular pacing system, mode of operation, and implantation procedure used by the physician. Rate responsive modes may be contraindicated in those patients who cannot tolerate pacing rates above the programmed Lower Rate.
• Dual chamber sequential pacing is contraindicated in patients with chronic or persistent supraventricular tachycardias, including atrial fibrillation or flutter.
• Single chamber atrial pacing is contraindicated in patients with an A-V conduction disturbance.
• ATP therapy is contraindicated in patients with an accessory antegrade pathway.

Warnings/Precautions

Pacemaker patients should avoid sources of magnetic resonance imaging, diathermy, high sources of radiation, electrosurgical cautery, external defibrillation, lithotripsy, and radiofrequency ablation to avoid electrical reset of the device, inappropriate sensing and/or therapy.

Medtronic CareLink® programmer and 9790 programmer

The Medtronic CareLink programmer and 9790 programmer are portable, microprocessor-based instruments used to program Medtronic implantable devices.

For additional information, please refer to the AT500™ Pacing System Technical Manual.

Caution: Federal law (USA) restricts this device to sale by or on the order of a physician.

Peer-to-peer referral presentations about atrial arrhythmia therapy may be found at:
www.medtronic.com
www.optseries.com