fla
Comparison of Clinical Characteristics and Frequency of Implantable Defibrillator Use Between Randomized Patients in the Antiarrhythmics Vs Implantable Defibrillators (AVID) Trial and Nonrandomized Registry Patientsfn1fn1This study was supported by Contract N01-HC-25117 from the National Heart, Lung, and Blood Institute, Bethesda, Maryland.