TY - JOUR
T1 - Reassessing the Role of Ischemia Imaging
T2 - Insights from the ISCHEMIA Trial
AU - Nayfeh, Malek
AU - Al-Mallah, Mouaz H.
N1 - Publisher Copyright:
© 2024, The Author(s), under exclusive licence to Korean Society of Nuclear Medicine.
PY - 2024
Y1 - 2024
N2 - Ischemia imaging plays an important role in prognostication as well as guiding decision for revascularization with known CAD, as shown in multiple observational registries. However, results from the ISCHEMIA trial (International Study of Comparative Health Effectiveness With Medical and Invasive Approaches) presented conflicting results, hinting at no survival benefit after revascularization in patients with moderate to severe ischemia on nuclear imaging. More recent analysis from the trial did, however, show decrease in cardiac mortality and increase in non-cardiac mortality following early revascularization. However, the ISCHEMIA trial has several limitations; most importantly, the trial design does not support a comparison between imaging modalities. Additionally, results of the trial do not apply to patients with previous CABG or ACS as they are exclusion criteria, which affects the diagnostic accuracy of nuclear stress imaging. Observational imaging registries offer better evidence about the accuracy of single-photon emission computed tomography (SPECT) and positron emission tomography (PET) in guiding revascularization for patients with ischemia. Results from ISCHEMIA trial can be used to guide management of patients with severe to moderate ischemia, provided they meet inclusion criteria. For those who do, shared decision-making is important to decide between invasive management or optimal medical therapy only.
AB - Ischemia imaging plays an important role in prognostication as well as guiding decision for revascularization with known CAD, as shown in multiple observational registries. However, results from the ISCHEMIA trial (International Study of Comparative Health Effectiveness With Medical and Invasive Approaches) presented conflicting results, hinting at no survival benefit after revascularization in patients with moderate to severe ischemia on nuclear imaging. More recent analysis from the trial did, however, show decrease in cardiac mortality and increase in non-cardiac mortality following early revascularization. However, the ISCHEMIA trial has several limitations; most importantly, the trial design does not support a comparison between imaging modalities. Additionally, results of the trial do not apply to patients with previous CABG or ACS as they are exclusion criteria, which affects the diagnostic accuracy of nuclear stress imaging. Observational imaging registries offer better evidence about the accuracy of single-photon emission computed tomography (SPECT) and positron emission tomography (PET) in guiding revascularization for patients with ischemia. Results from ISCHEMIA trial can be used to guide management of patients with severe to moderate ischemia, provided they meet inclusion criteria. For those who do, shared decision-making is important to decide between invasive management or optimal medical therapy only.
KW - Ischemia
KW - PET
KW - Revascularization
KW - SPECT
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U2 - 10.1007/s13139-023-00834-1
DO - 10.1007/s13139-023-00834-1
M3 - Review article
AN - SCOPUS:85181965144
SN - 1869-3474
JO - Nuclear Medicine and Molecular Imaging
JF - Nuclear Medicine and Molecular Imaging
ER -