Diagnostic and Prognostic Value of Cardiac Computed Tomography Angiography in Coronary Artery Disease

Q: What is the clinical evidence from this study?

Study design: Systematic Review. Population: Suspected or established coronary artery disease, particularly in patients with diabetes mellitus (n=18306). Intervention: Cardiac computed tomography angiography (CCTA) vs. Invasive coronary angiography (ICA), functional testing, or standard of care (SOC). Primary outcome: Diagnostic performance for obstructive CAD (>50% stenosis) and major adverse cardiovascular events (MACEs).

Q: What does this research mean for the field?

Cardiac computed tomography angiography is an effective non-invasive tool for CAD diagnosis and risk stratification that reliably identifies coronary stenosis and is associated with lower cardiovascular event rates in patients with diabetes mellitus. Novelty: ClaimNovelty.SYNTHESIS. Consensus alignment: ConsensusAlignment.NEUTRAL.

Saikat Barua; Tarannum Morshed; Kamrun Nahar; Rushaida Haque; Halima Begum

doi:10.70818/nmcj.v03i01.083

June 30, 2026Naogaon Medical College JournalOpen Access

Diagnostic and Prognostic Value of Cardiac Computed Tomography Angiography in Coronary Artery Disease

View Full Paper

Ask AI

Bookmark

Share

Key result

Cardiac computed tomography angiography demonstrated 81% sensitivity and 92% negative predictive value for obstructive CAD and lowered MACE rates in diabetic patients across major RCTs (1.1%-3.8% vs. 2.6%-7.7%).

Why the study?

Patients with diabetes mellitus have increased risk of coronary atherosclerosis and adverse cardiovascular events, motivating an evaluation of the diagnostic and prognostic role of CCTA in CAD risk stratification in this population.

Does cardiac computed tomography angiography (CCTA) improve diagnostic accuracy and reduce major adverse cardiovascular events compared to invasive coronary angiography, standard of care, or functional testing in patients with suspected or established coronary artery disease, particularly those with diabetes mellitus?

Key Points

To evaluate the diagnostic and prognostic role of cardiac computed tomography angiography (CCTA) in coronary artery disease risk stratification, particularly among patients with diabetes mellitus.
Conducted a systematic review of observational studies, diagnostic accuracy studies, and randomized controlled trials retrieved from PubMed, MEDLINE, Scopus, Web of Science, and Google Scholar.
Evaluated diagnostic performance against invasive coronary angiography (stenosis >50%) and assessed clinical outcomes including major adverse cardiovascular events.
Diagnostic studies comparing CCTA with invasive coronary angiography showed variable results; Schuijf et al. reported 81% sensitivity, 82% specificity, 62% positive predictive value, and 92% negative predictive value, while Andreini et al. observed significantly higher performance in non-diabetic patients (p=0.001).
In randomized trials, diabetic patients evaluated with CCTA had lower event rates than comparison groups: 3.1% vs. 7.7% in SCOT-HEART (HR 0.36, 95% CI 0.15–0.87), 1.1% vs. 2.6% in PROMISE (HR 0.38, 95% CI 0.18–0.79), and 3.8% vs. 6.5% in DISCHARGE (HR 0.58, 95% CI 0.27–1.25).

Study Design

Type

Systematic Review (n=18,306)

Structured PICO

Does cardiac computed tomography angiography (CCTA) improve diagnostic accuracy and reduce major adverse cardiovascular events compared to invasive coronary angiography, standard of care, or functional testing in patients with suspected or established coronary artery disease, particularly those with diabetes mellitus?

P

Population

Systematic review of 7 studies totaling 18,306 adult patients (including 3,376 with diabetes mellitus) with suspected or established coronary artery disease evaluated across 4 diagnostic accuracy studies (n=596) and 3 major randomized controlled trials (SCOT-HEART, PROMISE, DISCHARGE; n=17,710).

I

Intervention

Cardiac computed tomography angiography (CCTA), including 16-slice and 64-slice multidetector CT (MDCT), evaluated alone or combined with standard of care (SOC).

C

Comparator

Invasive coronary angiography (ICA; defining significant anatomical stenosis as >50%) in diagnostic accuracy studies and the DISCHARGE trial; standard of care (SOC) alone in the SCOT-HEART trial; and functional testing in the PROMISE trial.

O

Outcome

Diagnostic performance (sensitivity, specificity, positive predictive value, negative predictive value, and accuracy for detecting obstructive CAD >50% stenosis) and prognostic major adverse cardiovascular events (MACEs, variously defined across trials as composite of CAD death, cardiovascular death, non-fatal myocardial infarction, non-fatal stroke, hospitalization for unstable angina, or major procedural complications).composite

Limitations

No meta-analysis was performed due to heterogeneity in study designs, populations, imaging protocols, and outcome definitions.
Diagnostic studies included relatively small diabetic subgroups and employed different generations of CT technology (16-slice vs. 64-slice MDCT).
Included randomized trials differed in their primary endpoints, follow-up periods, and comparator strategies.
Subgroup findings in diabetic patients do not necessarily establish a definitive treatment benefit.
A meta-analysis was not performed because of heterogeneity in study designs, populations, imaging protocols, and outcome definitions.
Diagnostic studies included relatively small diabetic subgroups and employed different generations of CT technology (e.g., 16-slice or 64-slice MDCT).
Randomized trials differed in their primary endpoints, follow-up periods, and comparator strategies.
Subgroup findings do not necessarily establish a definitive treatment benefit in diabetic patients.

Ask about this paper

Answers are grounded in this paper and cite their sources.

Implication

This systematic review demonstrates that cardiac computed tomography angiography provides reliable non-invasive diagnostic assessment of coronary stenosis and is associated with lower cardiovascular event rates in diabetic patients compared with standard care or functional testing.

Abstract

Background: Coronary artery disease (CAD) is a major cause of cardiovascular morbidity and mortality worldwide. Patients with diabetes mellitus are at increased risk of coronary atherosclerosis and adverse cardiovascular events. Cardiac computed tomography angiography (CCTA) enables non-invasive assessment of coronary stenosis and atherosclerotic plaque, facilitating cardiovascular risk stratification. Objective: To evaluate the diagnostic and prognostic role of CCTA in CAD risk stratification, particularly among patients with diabetes mellitus. Methods: This systematic review included studies retrieved from PubMed, MEDLINE, Scopus, Web of Science, and Google Scholar. Observational studies, diagnostic accuracy studies, and randomized controlled trials evaluating CCTA in CAD were reviewed. Data on diagnostic performance, coronary stenosis, and cardiovascular outcomes were extracted and narratively synthesized. Methodological quality was assessed using appropriate tools. Results: Diagnostic studies comparing CCTA with invasive coronary angiography reported variable diagnostic performance. Schuijf et al. reported 81% sensitivity, 82% specificity, 62% positive predictive value, and 92% negative predictive value. Andreini et al. found significantly better diagnostic performance in non-diabetic patients (p=0.001), while Burgstahler et al. and Moon et al. reported no significant differences. In the SCOT-HEART, PROMISE, and DISCHARGE trials, diabetic patients in CCTA-based groups demonstrated numerically lower cardiovascular event rates than comparison groups (3.1% vs. 7.7%, 1.1% vs. 2.6%, and 3.8% vs. 6.5%, respectively). Conclusion: CCTA is a valuable non-invasive tool for CAD diagnosis and risk stratification. Further large-scale studies are needed to establish its long-term prognostic benefits in diabetic populations.

Discussion

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

Cite This Study

Barua et al. (2026) conducted a systematic review in Suspected or established coronary artery disease, particularly in patients with diabetes mellitus (n=18,306). Cardiac computed tomography angiography (CCTA) vs. Invasive coronary angiography (ICA), functional testing, or standard of care (SOC) was evaluated on Diagnostic performance for obstructive CAD (>50% stenosis) and major adverse cardiovascular events (MACEs). Cardiac computed tomography angiography demonstrated 81% sensitivity and 92% negative predictive value for obstructive CAD and lowered MACE rates in diabetic patients across major RCTs (1.1%-3.8% vs. 2.6%-7.7%).

synapsesocial.com/papers/6af0e999de503f37741409fa https://doi.org/10.70818/nmcj.v03i01.083

View Full Paper

Ask AI

Bookmark

Share

Diagnostic and Prognostic Value of Cardiac Computed Tomography Angiography in Coronary Artery Disease

Key Points

Study Design

Structured PICO

Limitations

Ask about this paper

Implication

Abstract

Discussion

Cite This Study

Diagnostic and Prognostic Value of Cardiac Computed Tomography Angiography in Coronary Artery Disease

Key Points

Study Design

Structured PICO

Limitations

Ask about this paper

Implication

Abstract

Discussion

Cite This Study

Keep reading

Keep reading