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Figure 1. Study sample. ICD, implantable cardioverter-defibrillator; NCDR, National Cardiovascular Data Registry; QRS, QRS interval duration.

Figure 1. Study sample. ICD, implantable cardioverter-defibrillator; NCDR, National Cardiovascular Data Registry; QRS, QRS interval duration.

Figure 2. Percentage of primary prevention patients who received a discretionary dual-chamber implantable cardioverter-defibrillator (ICD) by hospital.

Figure 2. Percentage of primary prevention patients who received a discretionary dual-chamber implantable cardioverter-defibrillator (ICD) by hospital.

Figure 3. Percentage of primary prevention patients who received a discretionary dual-chamber implantable cardioverter-defibrillator (ICD) by physician.

Figure 3. Percentage of primary prevention patients who received a discretionary dual-chamber implantable cardioverter-defibrillator (ICD) by physician.

Figure 4. Proportion of patients receiving a dual-chamber implantable cardioverter-defibrillator by hospital referral region.

Figure 4. Proportion of patients receiving a dual-chamber implantable cardioverter-defibrillator by hospital referral region.

Table 1. Baseline Characteristics Stratified by Type of Implantable Cardioverter-Defibrillator (ICD)
Table 1. Baseline Characteristics Stratified by Type of Implantable Cardioverter-Defibrillator (ICD)
Table 2. Patient, Health Care Provider, and Hospital Characteristics Associated With Receiving a Discretionary Dual-Chamber Implantable Cardioverter-Defibrillator (DC ICD)
Table 2. Patient, Health Care Provider, and Hospital Characteristics Associated With Receiving a Discretionary Dual-Chamber Implantable Cardioverter-Defibrillator (DC ICD)
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Original Investigation
Apr 23, 2012

Variation in Use of Dual-Chamber Implantable Cardioverter-DefibrillatorsResults From the National Cardiovascular Data Registry

Author Affiliations

Author Affiliations: Department of Medicine, University of Colorado Denver School of Medicine, Aurora (Drs Matlock, Peterson, Varosy, and Masoudi); Colorado Cardiovascular Outcomes Research Group, Denver (Drs Matlock, Peterson, Varosy, and Masoudi); Institute for Health Research, Kaiser Permanente Colorado, Denver (Drs Matlock, Peterson, and Masoudi); Department of Medicine, Denver Health Medical Center, Denver (Dr Peterson); Department of Internal Medicine, Yale University, New Haven, Connecticut (Mr Wang and Dr Curtis); Department of Medicine, Division of Cardiology, Beth Israel Deaconess Medical Center and the Boston VA Healthcare System, Boston, Massachusetts (Dr Reynolds); and The Medical Service, Section of Cardiology, Veterans Affairs Eastern Colorado Health Care System, Denver (Dr Varosy).

Arch Intern Med. 2012;172(8):634-641. doi:10.1001/archinternmed.2012.394
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