Cardiac magnetic resonance imaging: the new reference method for infarct characterization and prognostication after myocardial infarction?
Key result
Microvascular obstruction (P<0.0001) and infarct size (P=0.0043) measured by cardiac magnetic resonance were stronger predictors of the primary outcome than infarct size by SPECT (P=0.012).
Why the study?
Does CMR provide superior prognostic utility compared to SPECT for infarct characterization in acute STEMI patients?
Population
281 acute STEMI patients treated by primary angioplasty who had undergone both Tc99m-Sestamibi-SPECT and CMR
Comparison
Cardiac magnetic resonance imaging for infarct… vs Tc99m-Sestamibi-SPECT
Design
Editorial, imaging physicians were blinded to the adverse events for the…
Authors
Discussion
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Member takes
Implication
CMR provides superior prognostic utility over SPECT in post-MI patients, primarily due to its ability to detect microvascular obstruction, suggesting it should be the new reference standard.
Structured PICO
Does CMR provide superior prognostic utility compared to SPECT for infarct characterization in acute STEMI patients?
P
Population
281 acute STEMI patients treated by primary angioplasty who underwent both SPECT and CMR imaging.
E
Exposure
Cardiac magnetic resonance (CMR) imaging for infarct characterization
C
Comparator
Tc99m-Sestamibi-SPECT
O
Outcome
Composite of spontaneous cardiovascular events (excluding revascularization or unstable angina)composite
Main Result
p-value: p=<0.0001
CMR provides superior prognostic utility over SPECT in post-MI patients, primarily due to its ability to detect microvascular obstruction, suggesting it should be the new reference standard.
Limitations
- Retrospective nature of the analysis
- Selection of patients from clinical trials
- Slight discordance in time from admission for each test modality
- Exclusion of potentially higher-risk patients with contra-indications to CMR
- Incomplete enrolment
- retrospective nature of the analysis
- selection of patients from clinical trials
- slight discordance in time from admission for each test modality
- exclusion of potentially higher-risk patients with contra-indications to CMR
- incomplete enrolment
Cite This Study
Corocoran et al. (2013) conducted an editorial in Acute STEMI (n=281). Cardiac magnetic resonance (CMR) vs. Tc99m-Sestamibi-SPECT was evaluated on Primary outcome (p=<0.0001). Microvascular obstruction (P<0.0001) and infarct size (P=0.0043) measured by cardiac magnetic resonance were stronger predictors of the primary outcome than infarct size by SPECT (P=0.012).