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[Non-selective digital subtraction angiography of aortocoronary bypasses]
Insights
Intra-arterial digital subtraction angiography (DSA) effectively assesses coronary bypass graft patency post-surgery. However, it poorly visualizes distal vessels, limiting its use for diagnosing cardiac symptoms after bypass procedures.
Area of Science:
- Cardiovascular Surgery
- Diagnostic Imaging
- Interventional Cardiology
Background:
- Coronary artery bypass grafting (CABG) is a common procedure to restore blood flow to the heart.
- Assessing the patency of bypass grafts is crucial for patient outcomes.
- Digital subtraction angiography (DSA) is a widely used imaging technique in vascular assessment.
Purpose of the Study:
- To evaluate the utility of intra-arterial DSA for assessing coronary bypass graft patency and distal vessel visualization.
- To determine the effectiveness of DSA in the early postoperative phase following coronary artery bypass surgery.
Main Methods:
- Intra-arterial DSA was performed on 225 patients, examining 495 coronary bypasses within four weeks of surgery.
- The study included both aorto-coronary venous bypasses and internal mammary artery bypasses.
- Assessment focused on graft patency and the ability to visualize distal anastomoses and smaller branches.
Main Results:
- Overall graft patency was high, with 85.9% of examined bypasses patent.
- Visualization of distal anastomoses was limited, particularly for smaller branches (12.8%–19.2% filling).
- Successful demonstration of the distal anastomosis was achieved in 40.4% of right anterior interventricular artery bypasses and 36.1% of right coronary artery bypasses.
Conclusions:
- Intra-arterial DSA is suitable for confirming early postoperative coronary bypass graft patency.
- The method's limitations in visualizing distal vessels make it inadequate for investigating cardiac signs and symptoms post-bypass.
- Alternative or complementary imaging techniques may be necessary for comprehensive evaluation of bypass function and patient symptoms.
Abstract:
Intra-arterial DSA was performed on 225 patients with a total of 552 coronary bypasses (515 aorto-coronary venous bypasses and 37 internal mammary artery bypasses). Four hundred and ninety-five bypasses were examined in the four weeks following surgery; of these, 428 (85.9%) were patent. Demonstration of the distal anastomosis was obtained in 40.4% of bypasses of the right anterior interventricular artery and in 36.1% of the right coronary artery, at least in their proximal parts. Bypasses of smaller branches showed filling in 12.8 to 19.2%. Because of the unsatisfactory demonstration of distal vessels by non-selective intra-arterial DSA, this method is suitable only for showing the patency of a bypass in the postoperative phase, but should not be used for investigating cardiac signs and symptoms following a bypass examination.