Abstract
Background
We evaluated the prognostic value of changes in perfusion defect size (PDS) on serial MPS in patients treated with primary percutaneous coronary intervention (PCI) after acute myocardial infarction (AMI).
Methods
We enrolled 112 patients treated with primary PCI after AMI who underwent two stress MPS within 1 month and after 6 months. Improvement in PDS was defined as a reduction ≥5%. Remodeling was defined as an increase in left ventricular (LV) end-diastolic volume index ≥20%. Cardiac events included cardiac death, nonfatal MI, unstable angina, repeated revascularization, and heart failure.
Results
During a median follow-up of 86 months, 22 events occurred. Event rate was higher (P < .01) in patients with worsening of PDS compared to those with unchanged or improved PDS. Moreover, patients with remodeling had a higher (P < .001) event rate compared to those without. At Cox analysis, worsening of PDS and remodeling resulted independent predictors of events (both P < .01). Patients with both worsening of PDS and remodeling had the worst event-free survival (P <.001).
Conclusion
In patients treated with primary PCI after AMI, worsening of PDS and remodeling are associated to higher risk of events at long-term follow-up. Gated stress MPS improves risk stratification in these patients.
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Abbreviations
- AMI:
-
Acute myocardial infarction
- PCI:
-
Percutaneous coronary intervention
- MPS:
-
Single-photon emission computed tomography myocardial perfusion imaging
- LV:
-
Left ventricular
- PDS:
-
Perfusion defect size
- EDV:
-
End-diastolic volume
- ESV:
-
End-systolic volume
- EF:
-
Ejection fraction
- AER:
-
Annual event rate
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Emilia Zampella, Teresa Mannarino, Valeria Gaudieri, Adriana D’Antonio, Francesco Giallauria, Roberta Assante, Valeria Cantoni, Roberta Green, Ciro Gabriele Mainolfi, Carmela Nappi, Andrea Genova, Mario Petretta, Alberto Cuocolo, and Wanda Acampa declare that they have no financial conflict of interest.
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Zampella, E., Mannarino, T., Gaudieri, V. et al. Effect of changes in perfusion defect size during serial stress myocardial perfusion imaging on cardiovascular outcomes in patients treated with primary percutaneous coronary intervention after myocardial infarction. J. Nucl. Cardiol. 29, 2624–2632 (2022). https://doi.org/10.1007/s12350-021-02770-z
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DOI: https://doi.org/10.1007/s12350-021-02770-z