What question did this study set out to answer?

To assess and compare the diagnostic performance of exercise electrocardiography and thallium tomographic imaging for detecting silent coronary artery disease in asymptomatic diabetic patients.

January 1, 1990HeartOpen Access

Evaluation of exercise electrocardiography and thallium tomographic imaging in detecting asymptomatic coronary artery disease in diabetic patients.

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Why the study?

Does exercise electrocardiography or thallium tomographic imaging better detect asymptomatic coronary artery disease in diabetic patients?

Population

136 diabetic patients without symptoms of heart disease

Comparison

Thallium tomographic imaging and exercise… vs Coronary angiography (reference standard)

Design

Cross-sectional

Authors

MKM. Juhani KoistinenUniversity of Turku HHHeikki V. HuikuriElectrophysiology HPH PirttiahoUniversity of Oulu

Discussion

Member takes

Implication

May support exercise ECG over thallium for asymptomatic CAD screening in diabetes; Level 4 evidence leaves open prospective validation.

Key Points

To assess and compare the diagnostic performance of exercise electrocardiography and thallium tomographic imaging for detecting silent coronary artery disease in asymptomatic diabetic patients.
Conducted exercise electrocardiography and thallium tomographic imaging in 136 diabetic patients without clinical symptoms of coronary heart disease.
Performed confirmatory coronary angiography on 33 patients exhibiting abnormal scintigraphic defects, ST-segment depression, or both, while 6 eligible patients refused catheterisation.
Coronary angiography confirmed significant coronary artery disease (luminal narrowing ≥50%) in 13 patients, minimal stenosis (<50%) in 6 patients, and normal arteries in 14 patients.
Exercise electrocardiography yielded a positive predictive accuracy of 94% with 1 false-positive finding, though it missed disease in 3 patients with abnormal scintigraphy.
Thallium tomography exhibited a positive predictive accuracy of 48%, with 14 of 27 patients with perfusion defects demonstrating no coronary stenosis on angiography.

Structured PICO

Does exercise electrocardiography or thallium tomographic imaging better detect asymptomatic coronary artery disease in diabetic patients?

Population

136 diabetic patients without symptoms of heart disease

Intervention

Thallium tomographic imaging and exercise electrocardiography

Comparator

Coronary angiography (reference standard)

Outcome

Detection of angiographically significant coronary artery disease (≥50% narrowing of the coronary artery lumen)surrogate

Exercise electrocardiography has superior positive predictive accuracy compared to thallium tomographic imaging for detecting asymptomatic coronary artery disease in diabetic patients.

Limitations

Six patients with positive non-invasive tests refused cardiac catheterisation
Potential confounding of thallium results by small intramyocardial artery disease in diabetic patients

Cite This Study

Koistinen et al. (1990) studied this question.

synapsesocial.com/papers/6a6fdd70a528af2d65c3338b https://doi.org/10.1136/hrt.63.1.7

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Evaluation of exercise electrocardiography and thallium tomographic imaging in detecting asymptomatic coronary artery disease in diabetic patients.

Discussion

Member takes

Implication

Key Points

Structured PICO

Limitations

Cite This Study

Evaluation of exercise electrocardiography and thallium tomographic imaging in detecting asymptomatic coronary artery disease in diabetic patients.

Discussion

Member takes

Implication

Key Points

Structured PICO

Limitations

Cite This Study

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