title: Association of a 4-Tiered Classification of LV Hypertrophy With Adverse CV Outcomes in the General Population.
abstract: OBJECTIVE
  This study was performed to determine whether a 4-tiered classification of left ventricular hypertrophy (LVH) defines subgroups in the general population that are at variable risks of adverse cardiovascular (CV) outcomes.
  
  
  BACKGROUND
  We recently proposed a 4-tiered classification of LVH where eccentric LVH is subdivided into "indeterminate hypertrophy" and "dilated hypertrophy" and concentric LVH into "thick hypertrophy" and "both thick and dilated hypertrophy," based on the presence of increased left ventricular (LV) end-diastolic volume.
  
  
  METHODS
  Participants from the Dallas Heart study who underwent cardiac magnetic resonance and did not have LV dysfunction or a history of heart failure (HF) (n = 2,458) were followed for a median of 9 years for the primary outcome of HF or CV death. Multivariable Cox proportional hazards models were used to adjust for age, sex, African-American race, hypertension, diabetes, and history of CV disease.
  
  
  RESULTS
  In the cohort, 70% had no LVH, 404 (16%) had indeterminate hypertrophy, 30 (1%) had dilated hypertrophy, 289 (12%) had thick hypertrophy, and 7 (0.2%) had both thick and dilated hypertrophy. The cumulative incidence of HF or CV death was 2% with no LVH, 1.7% with indeterminate, 16.7% with dilated, 11.1% with thick, and 42.9% with both thick and dilated hypertrophy (log-rank p < 0.0001). Compared with participants without LVH, those with dilated (hazard ratio [HR]: 7.3; 95% confidence interval [CI]: 2.8 to 18.8), thick (HR: 2.4; 95% CI: 1.4 to 4.0), and both thick and dilated (HR: 5.8; 95% CI: 1.7 to 19.5) hypertrophy remained at increased risk for HF or CV death after multivariable adjustment, whereas the group with indeterminate hypertrophy was not (HR: 0.9; 95% CI: 0.4 to 2.2).
  
  
  CONCLUSIONS
  In the general population, the 4-tiered classification system for LVH stratified LVH into subgroups with differential risk of adverse CV outcomes.
authors: Division of Cardiology, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas.
authors: Sonia
authors: S
authors: Garg
authors: Division of Cardiology, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas.
authors: James A
authors: JA
authors: de Lemos
authors: Department of Clinical Science, University of Texas Southwestern Medical Center, Dallas, Texas.
authors: Colby
authors: C
authors: Ayers
authors: Division of Cardiology, Department of Internal Medicine, Duke University Medical Center, Durham, North Carolina.
authors: Michel G
authors: MG
authors: Khouri
authors: Division of Cardiology, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas.
authors: Ambarish
authors: A
authors: Pandey
authors: Division of Cardiology, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas; Department of Clinical Science, University of Texas Southwestern Medical Center, Dallas, Texas.
authors: Jarett D
authors: JD
authors: Berry
authors: Division of Cardiology, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas; Department of Radiology, University of Texas Southwestern Medical Center, Dallas, Texas.
authors: Ronald M
authors: RM
authors: Peshock
authors: Division of Cardiology, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas. Electronic address: mark.drazner@utsouthwestern.edu.
authors: Mark H
authors: MH
authors: Drazner
mesh_terms: D000328:Adult; D016009:Chi-Square Distribution; D018450:Disease Progression; D005260:Female; D006333:Heart Failure / Q000175:diagnosis / Q000401:mortality / Q000503:physiopathology; D006801:Humans; D017379:Hypertrophy, Left Ventricular / Q000145:classification / Q000175:diagnosis* / Q000401:mortality / Q000473:pathology / Q000503:physiopathology; D015994:Incidence; D053208:Kaplan-Meier Estimate; D019028:Magnetic Resonance Imaging, Cine; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D009206:Myocardium / Q000473:pathology*; D011237:Predictive Value of Tests; D011379:Prognosis; D016016:Proportional Hazards Models; D018570:Risk Assessment; D012307:Risk Factors; D013781:Texas / Q000453:epidemiology; D016277:Ventricular Function, Left
keywords: cardiac magnetic resonance; heart failure; hypertrophy; left ventricular geometry; troponin