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Increased incidence of life-threatening ventricular arrhythmias in implantable defibrillator patients after the World Trade Center attack

Jonathan S. Steinberg, MD, FACC^*,,*, Aysha Arshad, MBBS^*, Marcin Kowalski, MD^*, Atul Kukar, DO^*, Valentin Suma, MD^*, Margot Vloka, MD^*,, Frederick Ehlert, MD^*,, Bengt Herweg, MD^*,, Jacqueline Donnelly, BA^*, Julie Philip, PA-C^*, George Reed, PHD and Alan Rozanski, MD, FACC^*

^* Division of Cardiology, St. Luke's-Roosevelt Hospital Center and Columbia University College of Physicians and Surgeons, New York, New York, USA
Valley Hospital, Ridgewood, New Jersey, USA
Division of Preventive and Behavioral Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, USA

View larger version (11K): [in a new window]   Figure 1 Kaplan-Meier survival curve comparing probability of implantable cardioverter-defibrillator (ICD) discharges for termination of ventricular tachycardia or ventricular fibrillation (vertical axis) for 30 days before and 30 days after September 11. A significantly greater proportion of patients experienced ICD discharges after the World Trade Center attack.

View larger version (14K): [in a new window]   Figure 2 The day-to-day incidence of ventricular tachyarrhythmia triggering implantable cardioverter-defibrillator therapy during an eight-month observation period, with a substantial increase in event rate in the 30-day period after September 11, 2001, followed by a return to baseline.