What is the clinical evidence from this study?

Study design: Observational. Population: Postoperative coronary artery bypass graft (n=50). Intervention: Contrast-enhanced computed tomography. Primary outcome: Early postoperative graft occlusion.

What question did this study set out to answer?

To assess the feasibility of contrast-enhanced computed tomography for identifying early postoperative coronary bypass graft occlusion.

May 9, 2026Journal of the American College of Cardiology

Evaluation of early postoperative coronary artery bypass graft patency by contrast-enhanced computed tomography

Q: What are the key findings of this study?

Contrast-enhanced computed tomography was feasible for assessing early coronary bypass graft patency, detecting an overall early graft occlusion rate of 7%.

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Key result

Contrast-enhanced CT reliably assesses early CABG patency, detecting a ~7% graft occlusion rate.

n=50

Why the study?

The feasibility of contrast-enhanced computed tomography for detecting early postoperative coronary bypass graft occlusion was uncertain.

Is contrast-enhanced computed tomography a feasible method for detecting early postoperative coronary bypass graft occlusion in patients after CABG?

Key Points

To assess the feasibility of contrast-enhanced computed tomography for identifying early postoperative coronary bypass graft occlusion.
Evaluated 50 patients with a total of 117 coronary artery bypass grafts at an average of 5 ± 4 days after surgery.
Used contrast-enhanced computed tomography to assess graft patency, with sequential graft distal patency and image limitations documented.
Computed tomography successfully evaluated graft status in 47 of 50 patients, with limitations occurring in only three patients due to incisional pain or surgical metal clips.
Early graft occlusion occurred in 7% (8 of 117 grafts) and was significantly higher in grafts with intraoperative blood flow less than 45 ml/min (30%, p < 0.025).
Graft patency was significantly lower among patients with perioperative myocardial infarction (70%) compared to those without (95%, p < 0.025), whereas arrhythmia, myocardial dysfunction, and spasm showed no correlation.

Study Design

Type

Observational (n=50)

Structured PICO

Is contrast-enhanced computed tomography a feasible method for detecting early postoperative coronary bypass graft occlusion in patients after CABG?

Population

50 patients with 117 coronary bypass grafts evaluated at an average of 5 days after surgery to assess graft patency.

Exposure

Contrast-enhanced computed tomography

Outcome

Early postoperative graft occlusion/patencysurrogate

Limitations

Incisional chest pain
Multiple metal clips attached to the graft
Distal patency of sequential grafts cannot be determined by current techniques
Study limited in three patients due to incisional chest pain or multiple metal clips attached to the graft

Discussion

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Implication

Contrast-enhanced computed tomography is a feasible noninvasive screening method for assessing early postoperative CABG patency, which is generally high unless intraoperative flows are low.

Cite This Study

McKay et al. (1983) conducted an observational in Postoperative coronary artery bypass graft (n=50). Contrast-enhanced computed tomography was evaluated on Early postoperative graft occlusion. Contrast-enhanced computed tomography was feasible for assessing early coronary bypass graft patency, detecting an overall early graft occlusion rate of 7%.

synapsesocial.com/papers/69fea7a64625cd62ab19a9ed https://doi.org/10.1016/s0735-1097(83)80168-5

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Implication

Contrast-enhanced computed tomography is a feasible noninvasive screening method for assessing early postoperative CABG patency, which is generally high unless intraoperative flows are low.

Evaluation of early postoperative coronary artery bypass graft patency by contrast-enhanced computed tomography

Key Points

Study Design

Structured PICO

Limitations

Discussion

Implication

Cite This Study

Evaluation of early postoperative coronary artery bypass graft patency by contrast-enhanced computed tomography

Key Points

Study Design

Structured PICO

Limitations

Discussion

Implication

Cite This Study

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