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Updated: May 21, 2026
Interventional Diagnostic Procedure: A Practical Guide for the Assessment of Coronary Vascular Function
Published on: March 15, 2022
Utility of intravascular ultrasound guidance in patients undergoing percutaneous coronary intervention for type C
Kohei Wakabayashi1, Joseph Lindsay, Ana Laynez-Carnicero
1Department of Cardiology, Washington Hospital Center, Washington, District of Columbia 20010, USA.
Insights
Intravascular ultrasound (IVUS) guidance for percutaneous coronary intervention (PCI) in complex type C lesions significantly reduces major adverse cardiovascular events and cardiac death. IVUS-guided PCI improves outcomes for challenging coronary artery disease cases.
Area of Science:
- Cardiology
- Interventional Cardiology
- Medical Imaging
Background:
- Percutaneous coronary intervention (PCI) for complex lesions (ACC/AHA type C) presents challenges and may yield suboptimal outcomes.
- Intravascular ultrasound (IVUS) has been proposed as a method to enhance PCI guidance and improve results.
Purpose of the Study:
- To evaluate the effectiveness of IVUS-guided PCI compared to angiography-guided PCI in patients with complex type C coronary lesions.
- To assess the impact of IVUS guidance on major adverse cardiovascular events (MACE) and procedural success.
Main Methods:
- A propensity score-matched analysis of 1,274 patients (637 IVUS-guided, 637 angiography-guided) who underwent PCI for type C lesions between April 2000 and March 2010.
- Comparison of MACE (all-cause mortality, Q-wave MI, target lesion revascularization), procedural success, and specific procedural techniques between the two groups.
Main Results:
- IVUS-guided PCI resulted in significantly smaller final diameter stenosis (3% vs. 7%, P < 0.001) and higher angiographic success (97.9% vs. 94.8%, P < 0.001).
- The incidence of MACE was significantly lower in the IVUS-guided group (11.0% vs. 15.6%, P = 0.017), including a reduction in cardiac death (1.9% vs. 4.4%, P = 0.010).
- IVUS-guided PCI involved less predilatation, more postdilatation, and increased use of cutting balloons.
Conclusions:
- IVUS-guided PCI for complex type C lesions is associated with improved clinical outcomes.
- Consideration of IVUS guidance is recommended for PCI procedures involving complex coronary lesions to enhance patient results.
Background:
Percutaneous coronary intervention (PCI) of complex lesions (i.e., American College of Cardiology/American Heart Association class type C) remains challenging and the outcome may be compromised. The use of intravascular ultrasound (IVUS) to guide PCI was suggested to improve outcome.
Methods:
A cohort of 1,984 patients who underwent PCI to type C lesions in our center from April 2000 to March 2010 was identified. Using propensity score matching with clinical and angiographic characteristics, we identified 637 patients who underwent IVUS guidance and 637 patients who had only angiographic guidance PCI. Major adverse cardiovascular events (MACE), a composite end-point of all-cause mortality, Q-wave myocardial infarction and target lesion revascularization, were compared between the 2 groups.
Results:
After propensity score matching, baseline clinical and angiographic characteristics were well matched. Patients undergoing IVUS-guided PCI had less predilatation and more postdilatation, and were treated more often with cutting balloon. Final diameter stenosis was significantly smaller in the IVUS-guided group (3 ± 11% vs. 7 ± 19%, P < 0.001), resulting in higher angiographic success compared with the non-IVUS-guided group (97.9% vs. 94.8%, P < 0.001). The incidence of MACE was significantly lower in the IVUS-guided group compared to the angiography-guided group (11.0% vs. 15.6%, P = 0.017) as was cardiac death (1.9% vs. 4.4%, P = 0.010).
Conclusion:
IVUS-guided PCI for complex type C lesions is associated with better outcome and should be considered for these lesions.
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