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Number of patients, N
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372
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Age at ICD implant, years, mean (SD)
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61 (13)
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Gender, n (%)
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Male
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294 (79%)
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Cardiovascular disease risk factors, n (%)
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Hypertension
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194 (52%)
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Dyslipidemia
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180 (49%)
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Diabetes
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106 (29%)
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Smoking History
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Unknown
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17 (5%)
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Never
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194 (52%)
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Previous
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121 (33%)
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Current
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40 (11%)
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Angina
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51 (14%)
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Myocardial infarction
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156 (42%)
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Heart failure
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151 (41%)
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Cardiac arrest
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21 (6%)
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Percutaneous coronary intervention
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73 (20%)
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Coronary artery bypass graft surgery
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64 (17%)
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Ischemic heart disease
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221 (59%)
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Stroke
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28 (8%)
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Chronic kidney disease
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25 (7%)
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Cardiovascular medications, n (%)
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Aspirin
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203 (55%)
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Adenosine diphosphate receptor inhibitors
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54 (15%)
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Anticoagulation
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106 (29%)
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Diuretic
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165 (44%)
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Beta blocker
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298 (80%)
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Calcium channel blocker
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20 (5%)
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Angiotensin-converting-enzyme inhibitors
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237 (64%)
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Angiotensin receptor blocker
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45 (12%)
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Statin
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242 (65%)
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Nitroglycerin
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12 (3%)
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Antiarrhythmic drugs
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62 (17%)
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Indication
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Primary prevention
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238 (64%)
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Secondary prevention
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134 (36%)
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Type of ICD device
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Single-chamber ICD
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188 (50.7%)
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Dual-chamber ICD
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109 (29.4%)
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Cardiac resynchronization therapy defibrillator
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74 (19.9%)
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ECG findings
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QRS duration, ms, mean (SD)
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122 (31)
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Intraventricular conduction abnormalities
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Left bundle-branch block
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87 (29.4%)
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Right bundle-branch block
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26 (7.1%)
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Non-specific intraventricular conduction delay
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61 (16.6%)
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Presence of late gadolinium enhancement (LGE)
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266 (71.5%)
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Ischemic LGE
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179 (51%)
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- ECG electrocardiogram, ICD implantable cardioverter defibrillator, LGE late gadolinium enhancement
