News & Announcements Latest News

Discontinuation of the Abbott Microny Pacemaker

October 25, 2017
Dear Fellow PACES EP Colleagues,

It has been recently announced that Abbott (previously St Jude) was forced to discontinue production of the Microny Pacemaker due to the obsolescence of components required to manufacturer more devices. For years this device has been the smallest pacemaker on the market at 5.9 cc, and has been an essential option for the smallest of children who require pacing, particularly premature infants, as the next smallest device is 30% larger than the Microny.

There are currently approximately 100 devices in the United States, with expiration dates between now and the spring of 2019 (18 months, or 67 per year on an annualized basis).  There is no equivalent device anticipated in the near future.  Based on a sampling of usage in North America over the last ten years, approximately 40 devices per year were implanted in infants under 10 days of age, 50 in those under a month, and 75 in those under three months.   The vast majority of these infants were small for gestational age or premature, most with weights below 4.5 kg, many far below. Due to the impact of this issue on pediatric electrophysiologists, the PACES executive felt it was important to be proactive. The current usage data would suggest that if devices are only used in children weighing < 4.5 kg the current inventory would allow enough devices for our premature infants and the current supply should get us close to the time of a potentially new device. PACES is working with Abbott to be certain that the devices with the shortest expiration dates are implanted first. We would encourage all pediatric electrophysiologists to use the devices they think are most appropriate. If there is equal justification between a Microny and an alternative device, then a non-Microny device should be considered so as to prolong the inventory of remaining devices.  

Given the fact that implantation of such devices is often performed in conjunction with a pediatric cardiac surgeon this information is being shared with surgeons via the Congenital Heart Surgeons’ Society. In addition, we would encourage all pediatric electrophysiologists to work with their fetal teams and Abbott if they are aware of an impending delivery of a neonate with AV block.  I want to personally thank Beth Stephenson, Anne Dubin, and Yaniv Bar-Cohen who have been instrumental in facilitating discussions with Abbott and coming up with some structured recommendations for PACES regarding the discontinuation of the Microny pacemaker.  We hope that everyone will work together so that the current remaining devices are used for the most appropriate candidates until a newer device becomes available. If you have specific questions please feel free to reach out to me.

Mitchell I.  Cohen, MD FACC FHRS                                                    
President, Pediatric & Congenital Electrophysiology Society        


PJRT Reviews

October 10, 2017
Dear Fellow PACES Colleagues,

I hope that everyone is doing well and enjoying the autumn season. Attached you will find a power point presentation from the education committee summarizing eight recently published electrophysiology articles (PJRT: Pediatric EP Journal Review by Trainees).

I want to personally thank Andy Blaufox and Scott Ceresnak for their continued efforts leading the journal review. I also want to extend a sincere thanks to Will Goodyer, Anica Bulic, Chalese Richardson, and Louis Rigos who reviewed and summarized the papers. If you have specific questions or thoughts on how to improve PJRT please email either Andy ( or Scott ( directly.

Warmest regards,

Mitchell Cohen MD FACC FHRS
President, Pediatric & Congenital Electrophysiology Society (PACES)


7th Annual Pediatric Arrhythmia Symposium

September 11, 2017

New Research Study - COMIRB Protocol

August 31, 2017

Exciting New Committee for PACES AP Members

August 21, 2017

Wanted: APs interested in participating in our newly developed PACES AP Research Subcommittee

Purpose: To foster interest in developing and generating nursing/AP led research in the pediatric and adult congenital population


  • Review research proposals/grants for submission to PACES Research Committee
  • Provide support in writing and/reviewing abstracts for presentations
  • Long term goal is to design and implement multi-center studies led by PACES APs
Requirements: Be an AP member in good standing with PACES, interested in working with individuals to design and conduct research, improve patient care within the PACES Community, and commit to a 3-year term of service.

Contact: Vicki Zeigler ( or Vicki Freedenberg ( for more information.

PACES Summer Newsletter

August 14, 2017

New Patient Resource: Heart Block

July 20, 2017

PACES Patient Resources Website Survey

July 14, 2017
We invite you to take a 2-minute survey to help us improve our website content. Please do not include any urgent or confidential patient information in your answers.  Click here to begin survey.

PACES History Project - Videos Now Online

July 6, 2017
Dear fellow colleagues,

I hope that everyone is enjoying a little bit of free time this summer. For those traveling to Barcelona next week for World Congress, I look forward to catching up with everyone either at the meeting or over a glass of sangria and some tapas. Current attendance for WCPCCS 17’ is estimated at 3,000 registrants.

On a separate note, PACES leadership is excited to highlight a major new addition to the website. Under the heading: “About Our Society” is a brand new feature spearheaded by Ian Law and Carolyn Dick. There are four featured videos (You Tube downloads) by PACES leaders (Dick, Van Hare, Benson, and Walsh) about the inception of our society and its evolution over the years. We intend over the next few years to add key PACES leaders and lifetime achievement recipients to the growing PACES Website Library. I want to personally thank Ian and Carolyn for their hard work and dedication to this project as well as the fantastic high quality of the videos themselves.
Warmest regards,

Mitchell Cohen MD FACC FHRS
President, Pediatric & Congenital Electrophysiology Society (PACES)
Scientific Program Chair, World Congress of Pediatric Cardiology & Cardiothoracic Surgery 2017 & 2021


Request for PACES Committee Members

June 15, 2017

Dear fellow PACES Members,
I hope that everyone is enjoying the start of summer.  I want to thank everyone again for their involvement and continued support of PACES. PACES continues to grow and see ongoing collaboration with HRS, as it relates to guidelines, involvement on committees, and advocacy. The PACES Executive Committee continues to encourage members to join committees that are of particular interest and passion to individuals. Along those lines, there are a number of committees that have openings. If you would like to join one of these committees please let me know (email:

Research: Chair: Maully Shah

2 new individuals with an interest in basic science research
3 new junior individuals (< 5 years out of training) with an interest in clinical research

AP Research Subcommittee: Chair: Vicki Freedenberg

2 new Allied Professionals

Finance Committee: Chair: Bryan Cannon

2 new members

Education Committee: Chairs: Andy Blaufox and Scott Ceresnak

5 new members

Advocacy Committee: Chair: Seshadri Balajii

3 new members

Mitchell Cohen MD FACC FHRS

Radiation Safety in Children with Congenital and Acquired Heart Disease: A Scientific Position Statement on Multimodality Dose Optimization from the Image Gently Alliance

May 23, 2017


There is a need for consensus recommendations for ionizing radiation dose optimization during multi-modality medical imaging in children with congenital and acquired heart disease (CAHD). These children often have complex diseases and may be exposed to a relatively high cumulative burden of ionizing radiation from medical imaging procedures including cardiac computed tomography, nuclear cardiology studies and fluoroscopically guided diagnostic and interventional catheterization and electrophysiology procedures. Although these imaging procedures are all essential to the care of children with CAHD and have contributed to meaningfully improved outcomes in these patients, exposure to ionizing radiation is associated with potential risks, including an increased lifetime attributable risk of cancer. The goal of these recommendations is to encourage informed imaging to achieve appropriate study quality at the lowest achievable dose. Other strategies to improve care include a patient-centered approach to imaging, emphasizing education and informed decision making and programmatic approaches to ensure appropriate dose monitoring. Looking ahead, there is a need for standardization of dose metrics across imaging modalities, so as to encourage comparative effectiveness studies across the spectrum of CAHD in children.

For more information:

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