title: Myocardial T1 Measurement Predicts Beneficial LV Remodeling After Long-Term Heart Failure Therapy.
abstract: BACKGROUND
  The myocardial longitudinal relaxation time (T1) on cardiac magnetic resonance imaging (CMR) can quantify myocardial fibrosis in the presence or absence of visually detectable late gadolinium (Gd) enhancement (LGE). Mineralocorticoid receptor antagonist (MRA) treatment produces beneficial remodeling in nonischemic dilated cardiomyopathy (NIDCM). We assessed the hypothesis that interstitial myocardial fibrosis measured with the use of CMR predicts left ventricular (LV) beneficial remodeling in NIDCM after heart failure (HF) treatment including MRAs.
  
  
  RESULTS
  Twelve patients with NIDCM, on stable beta-blocker and angiotensin-converting enzyme inhibitor/angiotensin receptor-blocking therapy, were studied before and after 6-29 months of treatment with MRAs, by means of CMR assessment of LV structure, function, and T1 from standard Look-Locker sequences (T1LL). All patients had depressed cardiac function, dilated left ventricles, and no visual LGE. After adding MRA to HF treatment, the LV ejection fraction increased and the LV end-systolic volume index (LV end-systolic volume/m2) decreased in all patients (P < .0001). This this was inversely proportional to the baseline myocardial T1LL(r = -0.65; P = .02).
  
  
  CONCLUSIONS
  Myocardial T1LL, in the absence of visually detectable LGE, was quantitatively related to the degree of beneficial LV remodeling achieved in response to adding MRA to a HF regimen.
authors.affiliation: Division of Cardiovascular Medicine and Department of Biostatistics, Vanderbilt University School of Medicine and the Cardiology Section, Veterans Administration Tennessee Valley Healthcare System, Nashville, Tennessee.
authors.forename: William S
authors.initials: WS
authors.lastname: Bradham
authors.affiliation: Division of Cardiovascular Medicine and Department of Biostatistics, Vanderbilt University School of Medicine and the Cardiology Section, Veterans Administration Tennessee Valley Healthcare System, Nashville, Tennessee.
authors.forename: Susan P
authors.initials: SP
authors.lastname: Bell
authors.affiliation: Division of Cardiovascular Medicine and Department of Biostatistics, Vanderbilt University School of Medicine and the Cardiology Section, Veterans Administration Tennessee Valley Healthcare System, Nashville, Tennessee.
authors.forename: Douglas W
authors.initials: DW
authors.lastname: Adkisson
authors.affiliation: Division of Cardiovascular Medicine and Department of Biostatistics, Vanderbilt University School of Medicine and the Cardiology Section, Veterans Administration Tennessee Valley Healthcare System, Nashville, Tennessee.
authors.forename: Holly M
authors.initials: HM
authors.lastname: Smith
authors.affiliation: Division of Cardiovascular Medicine and Department of Biostatistics, Vanderbilt University School of Medicine and the Cardiology Section, Veterans Administration Tennessee Valley Healthcare System, Nashville, Tennessee.
authors.forename: Frank E
authors.initials: FE
authors.lastname: Harrell
authors.affiliation: Division of Cardiovascular Medicine and Department of Biostatistics, Vanderbilt University School of Medicine and the Cardiology Section, Veterans Administration Tennessee Valley Healthcare System, Nashville, Tennessee.
authors.forename: Mark A
authors.initials: MA
authors.lastname: Lawson
authors.affiliation: Division of Cardiovascular Medicine and Department of Biostatistics, Vanderbilt University School of Medicine and the Cardiology Section, Veterans Administration Tennessee Valley Healthcare System, Nashville, Tennessee.
authors.forename: Henry
authors.initials: H
authors.lastname: Ooi
authors.affiliation: Division of Cardiovascular Medicine and Department of Biostatistics, Vanderbilt University School of Medicine and the Cardiology Section, Veterans Administration Tennessee Valley Healthcare System, Nashville, Tennessee.
authors.forename: Douglas B
authors.initials: DB
authors.lastname: Sawyer
authors.affiliation: Division of Cardiovascular Medicine and Department of Biostatistics, Vanderbilt University School of Medicine and the Cardiology Section, Veterans Administration Tennessee Valley Healthcare System, Nashville, Tennessee. Electronic address: marvin.w.kronenberg@vanderbilt.edu.
authors.forename: Marvin W
authors.initials: MW
authors.lastname: Kronenberg
mesh_terms: D000328:Adult; D000806:Angiotensin-Converting Enzyme Inhibitors / Q000627:therapeutic use*; D002316:Cardiotonic Agents / Q000627:therapeutic use*; D004359:Drug Therapy, Combination; D005260:Female; D005500:Follow-Up Studies; D006333:Heart Failure / Q000175:diagnosis* / Q000188:drug therapy / Q000503:physiopathology; D006801:Humans; D019028:Magnetic Resonance Imaging, Cine / Q000379:methods*; D008297:Male; D008875:Middle Aged; D000451:Mineralocorticoid Receptor Antagonists / Q000627:therapeutic use*; D009206:Myocardium / Q000473:pathology*; D011237:Predictive Value of Tests; D013997:Time Factors; D020257:Ventricular Remodeling / Q000502:physiology*
chemical_list: D000806:Angiotensin-Converting Enzyme Inhibitors; D002316:Cardiotonic Agents; D000451:Mineralocorticoid Receptor Antagonists
keywords: Cardiac magnetic resonance imaging; heart failure; myocardial fibrosis