Sudden cardiac death and implantable cardioverter-defibrillators.

Veterans Affairs Palo Alto Health Care System, CA 94304-5588 , USA.
American family physician (Impact Factor: 1.82). 12/2010; 82(11):1357-66.
Source: PubMed

ABSTRACT Sudden cardiac death is a major public health problem, affecting 500,000 patients in the United States annually. An implantable cardioverter-defibrillator (ICD) can terminate malignant ventricular arrhythmias and has been shown to improve survival in high-risk populations. Although sudden cardiac death is a heterogeneous condition, left ventricular ejection fraction of 35 percent or less remains the single best factor to stratify patients for prophylactic ICD implantation, and randomized trials have shown mortality benefit in this population. Therefore, in patients with heart disease, assessment of ejection fraction remains the most important step to identify patients at risk of sudden cardiac death who would benefit from ICD implantation. Physician understanding of each patient's ICD type, indication, etiology of heart disease, and cardiovascular status is essential for optimal care. If the ICD was placed for secondary prevention, the circumstances relating to the index event should be explored. Evaluation of defibrillator shocks merits careful assessment of the patient's cardiovascular status. Consultation with a subspecialist and interrogation of the ICD can determine if shocks were appropriate or inappropriate and can facilitate management.

  • [Show abstract] [Hide abstract]
    ABSTRACT: The use of implantable cardioverter-defibrillators (ICDs) in pediatric patients has increased substantially over the past 3 decades. We report the case of a 15-year-old boy with congenital heart disease who presented with recurrent inappropriate ICD shocks due to a lead malfunction. Inaccessibility of a magnet to inactivate shock therapy in the pediatric emergency department (PED) resulted in numerous additional inappropriate shocks. Herein, we provide a brief overview of ICD care relevant to the PED. The complexities of these devices and their associated therapies require pediatric emergency physicians caring for these patients to recognize basic ICD functions and troubleshoot malfunctions to provide timely management. In particular, it is essential that PEDs be equipped with magnets and that physicians are trained in their appropriate use.
    Pediatric emergency care 06/2012; 28(6):562-5. DOI:10.1097/PEC.0b013e318258be04 · 0.92 Impact Factor