Long-term prognostic value of low-dose normal stress-only myocardial perfusion imaging by wide beam reconstruction: A competing risk analysis

被引:8
作者
Nappi, Carmela [1 ]
Acampa, Wanda [1 ,2 ]
Nicolai, Emanuele [3 ]
Daniele, Stefania [2 ]
Zampella, Emilia [1 ]
Assante, Roberta [1 ]
Gaudieri, Valeria [2 ]
Mannarino, Teresa [1 ]
Petretta, Mario [4 ]
Cuocolo, Alberto [1 ]
机构
[1] Univ Federico II, Dept Adv Biomed Sci, Naples, Italy
[2] CNR, Inst Biostruct & Bioimaging, Naples, Italy
[3] IRCCS SDN, Naples, Italy
[4] Univ Federico II, Dept Translat Med Sci, Naples, Italy
关键词
SPECT; MPI; diagnostic and prognostic application;
D O I
10.1007/s12350-018-1373-x
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Background. A normal stress myocardial perfusion single-photon emission computed tomography (MPS) is associated with a good clinical outcome. New iterative algorithms, such as wide beam reconstruction (WBR), which improve image interpretation with half-dose or half-time acquisition, have been proposed for cardiac MPS. The aim of this study was to assess the long-term predictive value of a low-dose normal stress-only MPS with WBR using conventional Anger camera in patients with known or suspected coronary artery disease (CAD). Methods and Results. A total of 2106 patients with known or suspected CAD and normal perfusion at half-dose stress-only MPS protocol were followed for a mean of 6.62.7 years. MPS data were reconstructed with WBR iterative algorithm. End-point events were cardiac death or nonfatal myocardial infarction. Noncardiac death was considered the competing event. During follow-up, 149 cardiac events occurred with an annualized event rate of 1.2%. Independent predictors of cardiac events at Cox analysis were age, male gender, diabetes mellitus, previous myocardial infarction and the need for pharmacologic stress testing. At Fine-Gray analysis the cumulative incidence of cardiac events progressively increases with age and in the presence of diabetes for any combination of gender and stress type. Survival tree analysis confirmed that long-term prognosis considerably varies according of risk factors profile. Conclusions. Low-dose normal stress-only WBR MPS has a reliable long-term prognostic value in patients with suspected or known CAD. This finding supports the introduction of such a method into clinical practice with a consistent dose optimization in the interest of patients and exposed staff.
引用
收藏
页码:547 / 557
页数:11
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