2 Aug 10

Ablating with Irrigated RF Safely and Effectively Using Microwave Radiometry Sensing Technology

Objectives. A novel technology for radiofrequency catheter ablation (RFCA) has been designed to maximize the effectiveness and accuracy of ablation therapy. The irrigated Tempasure™ temperature-sensing catheter (Advanced Cardiac Therapeutics, Laguna Beach, CA) has a chip-based instrumented tip that measures and interprets microwaves emitted from heated tissue during RFCA in order to measure temperature at depth in the tissue treated. Background. RFCA is the standard of care in the treatment of patients with arrhythmias. Ablation systems allow for temperature-controlled energy delivery and rapidly curtail energy delivery for an impedance rise. Irrigated saline cooling of the distal electrode helps minimize impedance rises, but interferes with the ability of the thermistor at the tip of the electrode to record temperature at the tissue level.



All About the Arrhythmia Technologies Institute

In this interview, we speak with Mark Sweesy, FHRS, CCDS, CEPS, RCES and President of the Arrhythmia Technologies Institute (ATI), located in Greenville, South Carolina. ATI is a complete educational program available for allied professionals in the field of cardiac device technology.

Describe ATI’s background and why it was created.
The idea for the school came back in 1987, when I participated in a 2-day training program for one of the pacemaker manufacturers. After my talk, 2 nurses came up to me and said they wanted to get into this field and wanted to know where they should go to learn more. I told them that unfortunately there weren’t really many options available for training — that most people at the time learned from their on-the-job experience.



Spotlight Interview: Regions Hospital

What is the size of your EP lab facility and number of staff members? What is the mix of credentials at your lab?
We have one dedicated EP room with the option of using a CV room on our busy days. Our EP lab is staffed by Physicians Assistants (PAs), Nurse Practitioners (NPs), RNs, CVTs and RT’s.

The PAs and NPs work to ensure all of our patients are ready for their respective procedures in the lab. In addition, they play a significant role with EP consults, discharge planning and follow-up care.

Because we share RN staff between the cath and EP labs, all of our nurses are trained in the specialty. We have two CVTs, one RT and one RN that are dedicated to EP, who are also cross trained to interventional cardiology; the rest of our CVT/RT staff rotate into EP as support to the dedicated staff. All staff must successfully pass ACLS.



Case Study: Tachycardia-Induced Cardiomyopathy with Ablation

In this article, the authors describe a case of tachycardia-induced cardiomyopathy, which is a weakening of the myocardium due to prolonged periods of a fast heart rate.1



10-Minute Interview: Louis Janeira, MD

Dr. Louis Janeira is a practicing cardiac electrophysiologist with Community Heart and Vascular Physical in Indianapolis, Indiana. He is also a published author of two medical murder mysteries. In writing these books, Dr. Janeira hopes to teach the reader about the different cardiac and EP conditions with which Dr. Janeira deals daily. Learn more about Dr. Janeira and his writing career here.

Tell us about your medical background and how you came to work in the field of electrophysiology. What interested you about this field?
Arrhythmia interpretation and management always came easily to me. I started out as a paramedic. My team and I would respond to all kinds of emergencies. I felt the most comfortable with arrhythmia cases. I was the one my peers came to for help with interpretation of the unusual rhythm strips, the funny little beats. That was the case with my EMS peers as well as later with my medical student and resident counterparts.



EP 101: Analysis of a Long RP Tachycardia

In the next installment of the EP 101 series, the authors describe a case involving a narrow complex tachycardia with a long RP interval.

Case Presentation
A 78-year-old male presented to the emergency room with complaints of shortness of breath, nausea, and fatigue. Past medical history was significant for abdominal aortic aneurysm repair and hypertension treated with metoprolol (75 mg twice daily) and furosemide.

His 12-lead electrocardiogram showed a narrow complex tachycardia at 153 beats/min with a long RP interval and negative p-waves in the inferior leads (Figure 1). Systolic blood pressure was 95 mmHg. Adenosine administration broke the rhythm to sinus bradycardia for a minute, but the tachycardia returned. No flutter waves were noted during a 5-second pause following adenosine administration. The tachycardia broke spontaneously after a few minutes.



On the Horizon: Using Low-Level Electromagnetic Fields to Treat Atrial Fibrillation

In this article, EP Lab Digest speaks with Allen S. Braswell, Jr., JD, CEO of Pico-Tesla, about their Magneceutical™ Therapy, which involves the use of a very precise, extremely low-level electromagnetic field (EMF) applied by a specially designed device called the Resonator™. Recently, data from a study completed at the University of Oklahoma’s Heart Rhythm Institute suggested that extremely low-level EMFs could prevent and reverse involuntary remodeling of the heart by terminating and preventing atrial fibrillation (AF). Learn more about this promising therapy here.

Tell us about the background of Pico-Tesla’s Magneceutical™ Therapy, and when the Resonator™ was created.



Implementation of a Highly-Performing Electrophysiology Device Implant Program: Is There a Role for Niche Hospitals?

Good Samaritan Hospital (GSH) and Lebanon Cardiology Associates (LCA) recently partnered to create a community hospital EP program caring for elderly, ill patients, and experienced lower overall implant complications compared to available national trials and single academic centers. Find out more information here.

Background
After approximately two years of planning, Good Samaritan’s invasive cardiac EP lab was opened on July 1, 2008. There are two full-time technologists (David Lugg, BS, RCIS and Douglas Hollis, RCIS) and one full-time nurse (Robert Gray, BSN, RN). In addition, we have one part-time technologist, Michelle Stoner, BS, CVT, who still participates in traditional coronary and peripheral interventional cardiology procedures.



Email Discussion Group: August 2010

Do you have a new question you would like to submit? You can also follow our EP discussion online at http://eplabdigest.com/discussion-questions.

New Question:

Staffing Practices
We are surveying labs throughout the country for feedback regarding staffing practices. How many staff members are required to perform procedures? What is the role/function of each person? Have you ever performed procedures with less than a full team (as defined by your institution)? Where have you obtained data to support your standard of care?
— C. Levine, RN, BSN, MA



Percutaneous Cardiac Support During Catheter Ablation Utilizing the Impella Microaxial Flow Pump

In this article, the authors provide an overview of their use of a microaxial flow pump in a patient with transposition of the great arteries (TGA). This device allowed hemodynamic stability during mapping and ablation of the atrial reentrant tachycardia.

Introduction
Transcatheter ablation of atrial flutter and ventricular tachycardia in patients with structural heart disease has proven effective in eliminating recurrent symptoms and frequent ICD discharges.1-3 However, hemodynamic instability may develop during arrhythmia mapping, particularly in patients with significant ventricular dysfunction.3



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