Detection of Diffuse Myocardial Fibrosis in Patients with Nonischemic Cardiomyopathy: Cardiac MR Evaluation

Thursday, October 11, 2012 — Poster Session III
10:00 a.m. – Noon	Natcher Conference Center, Building 45	CC	IMAG-18

Authors

• S. Liu
• M. S. Nacif
• C. T. Sibley
• E. Yang
• J. Han
• D. A. Bluemke

Abstract

Purpose: To evaluate CMR for quantifying diffuse interstitial fibrosis in heart failure (HF). Methods and Materials: Patients were enrolled in two groups: systolic HF (HFS) and diastolic HF (HFD). A healthy control group age matched was also enrolled. All CMR were performed on a 3T scanner with a bolus of 0.15mmol/kg of gadopentetate dimeglumine. A MOLLI T1 mapping sequence was acquired at short axis. Results: 28 subjects (19 patients, age 63±12 years and 9 matched healthy subjects, age 61±7 years) were evaluated. 15 had HFS and 4 had HFD. The ejection fraction (EF) was 62.0±5.8% in healthy, 63.5±11.3% in HFD and 31.0±7.3% in HFS. Pre-contrast T1 was lower in HF compared to healthy subjects (1196±29ms in HFD, 1255±15ms in HFS, and 1321±20ms in healthy, respectively, p=0.002 healthy vs. HFD, p=0.03 healthy vs. HFS). λ was greater in HFD and HFS compared to healthy subjects (48.5±1.5% in HFD, 50.9±0.9% in HFS, 45.8±1.2% in healthy, respectively, p=0.006 for healthy vs. HFS). ECV was also greater in HFD and HFS compared to healthy subjects (29.0±0.9% in HFD, 29.8±0.6% in HFS, 27.1± 0.7% in healthy, respectively, p=0.002 for healthy vs. HFS). Conclusion: ECV and λ are increased in HF subjects compared to healthy subjects.

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