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Myocardial perfusion imaging after coronary revascularization: a clinical appraisal
Wanda Acampa1, Maria Piera Petretta, Stefania Daniele
1Institute of Biostructures and Bioimages, National Council of Research, Naples, Italy.
Insights
Stress myocardial perfusion imaging (MPI) is valuable for evaluating patients after coronary revascularization. While recommended for symptomatic patients, its role in asymptomatic individuals after percutaneous coronary intervention (PCI) or coronary artery bypass grafting (CABG) requires further study.
Area of Science:
- Cardiology
- Nuclear Medicine
- Medical Imaging
Background:
- Revascularization procedures like percutaneous coronary intervention (PCI) and coronary artery bypass grafting (CABG) are common for coronary artery disease.
- Effective management of post-revascularization patients requires tailored follow-up strategies.
- Stress myocardial perfusion single-photon emission computed tomography (MPS) is a key imaging modality for evaluating these patients.
Purpose of the Study:
- To evaluate the role of stress myocardial perfusion single-photon emission computed tomography (MPS) in the follow-up of patients after PCI and CABG.
- To assess the utility of MPS in both symptomatic and asymptomatic patients post-revascularization.
- To determine the appropriate follow-up strategies for patients undergoing revascularization procedures.
Main Methods:
- Review of current guidelines and literature regarding the use of radionuclide imaging (including MPS) in post-revascularization follow-up.
- Analysis of the indications for MPS in patients after PCI and CABG, considering symptomatic status.
- Examination of evidence supporting the use of MPS for risk stratification in asymptomatic patients late after CABG.
Main Results:
- Radionuclide imaging is recommended for symptomatic patients post-PCI and CABG.
- MPS is indicated in specific asymptomatic patient subsets after PCI, particularly with incomplete revascularization.
- Myocardial perfusion imaging (MPI) late after CABG has demonstrated value in risk stratification, even in asymptomatic individuals.
Conclusions:
- Current guidelines recommend stress MPS for symptomatic patients after revascularization.
- The role of routine stress MPS in asymptomatic patients post-PCI and CABG is debated, with specific indications for PCI.
- Silent ischemia poses adverse outcomes, suggesting potential benefit of stress testing in all patients post-revascularization, warranting further large-scale prospective studies.
Abstract:
Revascularization procedures, including percutaneous coronary intervention (PCI) and coronary artery bypass grafting (CABG), are performed in many patients with coronary artery disease. Despite the effectiveness of these procedures, different follow-up strategies need to be considered for the management of patients after revascularization. Stress myocardial perfusion single-photon emission computed tomography (MPS) is a suitable imaging method for the evaluation of patients who have undergone PCI or CABG, and it has been used in the follow-up of such patients. Radionuclide imaging is included in the follow-up strategies after PCI and CABG in patients with symptoms, but guidelines warn against routine testing of all asymptomatic patients after revascularization. After PCI, in the absence of symptoms, radionuclide imaging is recommended and indicated as appropriate after incomplete or suboptimal revascularization and in specific asymptomatic patient subsets. On the other hand, the value of MPS late after CABG in risk stratification has been demonstrated even in the absence of symptoms. Thus, given the adverse outcome associated with silent ischaemia, it can be speculated that all patients regardless of clinical status should undergo stress testing late after revascularization. Larger prospective studies are needed to assess whether stress MPS will have an impact on the outcome in asymptomatic patients after revascularization.
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