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Detection of restenosis after coronary angioplasty for single-vessel disease: How reliable are exercise electrocardiography and scintigraphy in asymptomatic patients?
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1989
Year
DiagnosisCoronary Artery DiseaseAcute Myocardial InfarctionElectrophysiological EvaluationPublic HealthCardiologyAtherosclerosisPositive EcgRadiologyMyocardial InfarctionCardiovascular ImagingPercutaneous Coronary InterventionNegative EcgEmergency MedicineCardiovascular DiseaseSingle-vessel DiseaseCoronary UnitCoronary AngioplastyAsymptomatic PatientsMedicineExercise Ecg
The diagnostic value of exercise electrocardiography and thallium myocardial scintigraphy for the detection of restenosis was assessed in 111 patients undergoing control angiography 6 months after successful coronary angioplasty. All patients were free of symptoms at the time of the study. A diameter reduction of 70% or more at the site of angioplasty was considered restenosis. The sensitivity of exercise electrocardiography is low (64%). Exercise ECG and scintigraphy are highly specific (respectively 90% and 93%). The predictive value of a positive ECG or thallium scintigraphy is poor (respectively 53% and 63%). The value of a negative scintigraphic result is slightly better than the predictive value of a negative ECG (98% vs 95%; NS). A negative exercise scintigraphy almost excludes severe restenosis. These non-invasive tests seem suitable for the detection of asymptomatic restenosis.