What question did this study set out to answer?

July 1, 2004Health Technology AssessmentOpen Access

Systematic review of the effectiveness and cost-effectiveness, and economic evaluation, of myocardial perfusion scintigraphy for the diagnosis and management of angina and myocardial infarction

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Why the study?

Does SPECT myocardial perfusion scintigraphy improve diagnostic accuracy, prognostic risk stratification, and cost-effectiveness compared to stress ECG and/or coronary angiography in patients with suspected coronary artery disease?

Key Points

To assess the clinical effectiveness, prognostic value, and cost-effectiveness of single photon emission computed tomography (SPECT) myocardial perfusion scintigraphy for diagnosing and managing angina and myocardial infarction.
Systematic review of major electronic databases with independent dual-reviewer data extraction covering 21 diagnostic, 46 prognostic, and 3 comparative imaging studies.
Health economic evaluation using a decision tree model for diagnosis and a Markov model for long-term management of suspected coronary artery disease, measuring incremental cost per quality-adjusted life-year (QALY) in 2001–02 UK pounds sterling.
SPECT demonstrated superior diagnostic performance over stress ECG, with higher sensitivity, higher positive likelihood ratios, and lower negative likelihood ratios across evaluated studies.
Perfusion defect extent, size, and reversibility on SPECT accurately predicted future cardiac death or non-fatal myocardial infarction, allowing low-risk patients with normal scans to safely avoid invasive coronary angiography.
Economic modeling found SPECT strategies were dominant or generated additional QALYs at acceptable cost compared with stress ECG pathways, with cost-effectiveness improving when SPECT directly replaced unnecessary angiography.

Structured PICO

Population

Patients with suspected coronary artery disease, angina, or myocardial infarction (systematic review including 21 diagnostic studies, 46 prognostic studies, and 3 other studies).

Intervention

Single photon emission computed tomography (SPECT) myocardial perfusion scintigraphy.

Comparator

Stress electrocardiography (ECG) and/or coronary angiography (CA).

Outcome

Diagnostic performance (sensitivity, specificity, likelihood ratios), prognostic value for future cardiac events, and cost-effectiveness (incremental cost per QALY).

SPECT myocardial perfusion scintigraphy provides superior diagnostic and prognostic information compared to stress ECG for suspected coronary artery disease and appears to be a cost-effective strategy.

Limitations

All prognostic studies were observational and may be biased by unknown confounding factors
Relatively small number of diagnostic studies
Heterogeneity was evident among studies
External validity of the studies was low
Some assumptions in the economic model were based on non-UK study data

Discussion

No takes yet. Share an insight, caveat, or question.

Implication

Supports SPECT over stress ECG for suspected CAD; confirms integrated diagnostic, prognostic, and economic value in Level 1 evidence.

Cite This Study

Mowatt et al. (2004) studied this question.

synapsesocial.com/papers/6a6fd2ca660549caf2c45f90 https://doi.org/10.3310/hta8300

View Full Paper

Ask AI

Bookmark

Systematic review of the effectiveness and cost-effectiveness, and economic evaluation, of myocardial perfusion scintigraphy for the diagnosis and management of angina and myocardial infarction

Key Points

Structured PICO

Limitations

Discussion

Implication

Cite This Study

Systematic review of the effectiveness and cost-effectiveness, and economic evaluation, of myocardial perfusion scintigraphy for the diagnosis and management of angina and myocardial infarction

Key Points

Structured PICO

Limitations

Discussion

Implication

Cite This Study

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