Myocardial Lipid and Creatine of Heart Failure on MRS

PRESS localized 1D MRS sequence was used on a 3-T MR system. The lipid resonances will be analyzed using the LC-Model algorithm, and a Cramer-Rao lower bound (CRLB) threshold of 50% was used as quality control. Resonances of fatty acid (FA, lipid resonances δ 0.9, 1.3 and 1.6 ppm) and polyunsaturated fatty acid (PUFA, lipid resonance δ 2.1 and 2.3, 2.8, 5.3 ppm) will be evaluated on MRS, with ratios normalized with total TG value.