[Does routine angiographic control make sense after percutaneous coronary intervention?]

Area of Science:

• Cardiovascular Medicine
• Interventional Cardiology
• Diagnostic Imaging

Background:

• Coronary intervention requires careful follow-up to detect restenosis or new stenoses.
• Routine coronary angiography is a common follow-up method, but carries risks and costs.
• Noninvasive diagnostic tests are being explored as alternatives to routine angiography.

Purpose of the Study:

• To evaluate the feasibility of avoiding routine coronary angiography after coronary intervention.
• To determine if noninvasive tests (medical history, exercise electrocardiography) can guide the need for repeat angiography.
• To assess the diagnostic accuracy and potential savings of a selective angiography approach.

Main Methods:

• A cohort of 509 patients who underwent coronary intervention were followed from 1996-2000.
• Routine follow-up included coronary angiography and exercise electrocardiography (ECG).
• Patients with pathologic or questionable noninvasive test results were identified for selective angiography.

Main Results:

• Out of 509 angiograms, 105 restenoses and 15 new stenoses were detected.
• Exercise ECG was not feasible or satisfactory in 58% of patients.
• A selective approach based on medical history and ECG could reduce routine angiograms by 22% but miss 16% of significant stenoses.

Conclusions:

• Recurrent stenosis after coronary intervention occurs in 21% of patients.
• Exercise ECG has limited utility due to poor feasibility and moderate accuracy (68% sensitivity, 60% specificity).
• Selective use of angiography based on noninvasive tests could save resources but carries a risk of missed diagnoses.