[∗
]Section of Electrophysiology, Division of Cardiology, Johns Hopkins Hospital, Johns
Hopkins School of Medicine, Baltimore, Maryland
[†
]Section of Electrophysiology, Heart and Vascular Institute, University of Pittsburgh
Medical Center, Pittsburgh, Pennsylvania
[‡
]Arrhythmia Division, Inova Heart and Vascular Institute, Fairfax, Virginia
[§
]Division of Pediatric Cardiology, Johns Hopkins Hospital, Johns Hopkins School of
Medicine, Baltimore, Maryland
[‖
]Division of Cardiology, Johns Hopkins Hospital, Johns Hopkins School of Medicine,
Baltimore, Maryland