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Updated: Aug 24, 2026

A New Single Chamber Implantable Defibrillator with Atrial Sensing: A Practical Demonstration of Sensing and Ease of Implantation
Published on: February 28, 2012
Successful implantable cardioverter defibrillator placement in an ambulatory patient without thoracic venous access
Zayd A Eldadah1, J Kevin Donahue
1Division of Cardiology, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA.
Abstract:
Evaluation of an individual requiring permanent cardiac pacing and implantable cardioverter defibrillator (ICD) function revealed no suitable thoracic vascular access for traditional device implantation. Because the patient refused cardiac surgery, a left femoral venous approach was used to introduce two extended-length, active fixation leads that were positioned in the right atrium and ventricle. The leads were tunneled to the abdomen and connected to a dual-chamber ICD. A low defibrillation threshold and robust pacing and sensing parameters were observed at implant. All of these parameters were stable at 6-month follow-up. In addition, no negative effects of the predominantly abdominal shock vector were observed. This case suggests that femoral ICD placement should be considered before routinely referring such patients for open chest surgery.
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