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Intraoperative echocardiographic visualisation of coronary arteries, before and after aorto-coronary bypass grafting
1Department of Cardiovascular Surgery, University of Bonn Medical Center, FRG.
Insights
High-frequency ultrasound helps surgeons visualize coronary artery lesions missed by angiography. This technique aids in locating vessels obscured by fat or scarring, improving surgical management for coronary artery disease (CAD).
Area of Science:
- Cardiovascular Surgery
- Medical Imaging
- Vascular Biology
Background:
- Coronary artery disease (CAD) evaluation often relies on angiography, which may not fully inform surgical planning.
- Intraoperative visualization is crucial for managing complex coronary artery anatomy, especially in reoperative cases.
- Epicardial scarring and intramyocardial vessels can obscure critical coronary artery details.
Purpose of the Study:
- To evaluate a high-frequency ultrasonic technique for intraoperative visualization of coronary artery lesions.
- To determine if ultrasound can identify lesions not evident on preoperative angiography.
- To assess the utility of ultrasound in guiding surgical interventions for CAD.
Main Methods:
- Intraoperative high-frequency ultrasound was used to investigate coronary arteries in 81 patients.
- The technique focused on localizing lesions, including calcification, intramyocardial vessels, and those obscured by fat or scarring.
- Measurements of arterial diameters were taken pre- and post-intervention to assess treatment effects.
Main Results:
- High-frequency ultrasound successfully visualized stenotic, arteriosclerotic, and fibrotic arterial wall lesions.
- The technique provided additional anatomical information beyond preoperative angiograms.
- It was particularly effective in locating intramyocardial or deeply embedded coronary arteries.
- The effects of intraoperative coronary artery dilatation procedures were successfully monitored.
Conclusions:
- High-frequency ultrasound is a valuable tool for intraoperative assessment of coronary arteries in CAD patients.
- It complements angiography by revealing details crucial for surgical decision-making and intervention.
- This technique enhances the ability to manage complex coronary artery anatomy and assess treatment outcomes.
Abstract:
While angiography remains the standard evaluation method for the visualisation of coronary artery anatomy and morphology, the angiographic findings in patients referred for surgical treatment of coronary artery disease (CAD) often do not totally answer questions related to surgical management. We therefore explored a high-frequency ultrasonic technique that allows the surgeon to localize coronary artery lesions not demonstrated angiographically, such as the distribution of coronary artery calcification in myocardial vessels buried in fat or obscured by epicardial scarring frequently observed in patients who had previously been operated upon. Coronary arteries of 81 patients were investigated intraoperatively. Stenotic arteriosclerotic or fibrotic lesions of the arterial wall could be easily seen. This technique provides additional information to preoperative angiograms, especially in locating major coronary arteries that lie intramyocardially, or those deeply buried in fat. Intraoperative coronary artery dilatation procedures could be followed and the effects determined by measuring pre- and postoperative diameters.