Abstract
Background
In contrast to201T1C1,99mTc-sestamibi shows very slow myocardial clearance after its initial myocardial uptake. In the present study, myocardial washout of99mTc-sestamibi was calculated in patients with non-ischemic chronic heart failure (CHF) and compared with biventricular parameters obtained from first-pass and ECG-gated myocardial perfusion SPECT data.
Methods and Results
After administration of99mTc-sestamibi, 25 patients with CHF and 8 normal controls (NC) were examined by ECG-gated myocardial perfusion SPECT and planar data acquisition in the early and delayed (interval of 3 hours) phase. Left ventricular ejection fraction (LVEF, %), peak filling rate (PFR, sec−1), end-diastolic volume (LVEDV, ml) and end-systolic volume (LVESV, ml) were automatically calculated from the ECG-gated SPECT data. Myocardial washout rates over 3 hours were calculated from the early and delayed planar images. Myocardial washout rates in the CHF group (39.6±5.2%) were significantly higher than those in the NC group (31.2±5.5%, p<0.01). The myocardial washout rates for the 33 subjects showed significant correlations with LVEF (r=−0.61, p<0.001), PFR (r=−0.47, p<0.01), LVEDV (r=0.45, p<0.01) and LVESV (r=48, p<0.01),Conclusion: The myocardial washout rate of99mTc-sestamibi is considered to be a novel marker for the diagnosis of myocardial damage in patients with chronic heart failure.
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Kumita, Si., Seino, Y., Cho, K. et al. Assessment of myocardial washout of Tc-99m-sestamibi in patients with chronic heart failure: Comparison with normal control. Ann Nucl Med 16, 237–242 (2002). https://doi.org/10.1007/BF03000101
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DOI: https://doi.org/10.1007/BF03000101