Tiny Cardiac Monitor Detects Arrhythmias

LINQ Loop RecorderIn March, 2014, Hartford Hospital was the first in Connecticut to implant a new implantable cardiac monitor (Medtronic Reveal LINQ).

This device is 87% smaller than the previous monitor, lasts 3 years, and is implanted by injecting it under the skin in the chest. The entire procedure takes only a few minutes and only requires a small amount of local anesthetic. These devices are used to detect arrhythmias, like atrial fibrillation, which can cause palpitations, passing out, and strokes.

Dr. Steven Zweibel, the Director of Electrophysiology, stated that "the LINQ implantable loop recorder will revolutionize the way we monitor and treat atrial fibrillation". The device connects to a wireless cellular transmitter that is provided to the patient and can send information on the patient's heart rhythm back to their physicians almost immediately.

The patient who received the injectable monitor has had two mini-strokes (TIAs) which may have been caused by atrial fibrillation. The hope is that the LINQ device and monitor will reveal the cause of these events and allow his doctors to more appropriately target therapy so he does not go on to have a stroke.



Hartford Hospital Opens Atrial Fibrillation Center

The Atrial Fibrillation (A-Fib) Center at Hartford Hospital is the first in the region to offer comprehensive evaluation and management services for patients suffering from A-Fib. Catheter ablation is a minimally invasive outpatient procedure that is increasingly being used to treat patients who do not respond to medications.

In the story below, which originally aired in February 2014 on NBC30, Dr. Eric Crespo, the Director of the Interventional Electrophysiology lab at Hartford Hospital, discusses the ways that advanced 3D mapping systems are utilized during the procedure. One of Dr. Crespo’s patients also shares his experience undergoing successful ablation of A-Fib.



New Cardiac Defibrillator In Use at Hartford Hospital

On March 31, 2011, Dr. Steven L. Zweibel, director of electrophysiology, was one of the first surgeons in the country to implant a new Medronic Protecta cardiac defibrillator, approved three days earlier by the FDA. The Protecta defibrillator can distinguish between benign and fatal arrhythmias, largely removing the threat of unneeded shocks.

Hartford Hospital was one of just two hospitals in the Northeast to receive the first shipment of the device. The surgery was featured in a March 31 Hartford Courant article, “Hartford Hospital Puts New Heart Device in Patient.

Implantable defibrillators are designed to provide lifesaving shocks or painless pacing to stop life-threatening fast or irregular heart beats, also known as ventricular arrhythmias, which can lead to sudden cardiac death. Sudden cardiac death kills more people each year than lung cancer, breast cancer and HIV/AIDS combined. Medtronic estimates more than 70,000 lives have been saved worldwide by implantable defibrillators over the past five years.

Medtronic ProtectaWhile the majority of shocks delivered are necessary to treat potentially fatal arrhythmias, studies estimate that up to 20 percent of patients with implantable defibrillators may experience inappropriate shocks in response to a benign arrhythmia or electrical noise sensed by the device. Additionally, data show that 61 percent of patients who received an inappropriate shock visited the hospital, clinic or emergency room at least once within three days of receiving therapy.

Medtronic estimates, based on a study, that 92 percent of patients using its new technology will be free of inappropriate shocks five years after implantation.