Comparison of dipyridamole-echocardiography test and exercise thallium-201 scanning for diagnosis of coronary artery disease

E. Picano, O. Parodi, F. Lattanzi, G. Sambucetti, M. Masini, P. Marzullo, A. Distante, A. L'Abbate

Research output: Contribution to journalArticlepeer-review

Abstract

Two noninvasive tests to detect and localize coronary stenoses were compared in a fully blinded protocol. Thallium-201 myocardial perfusion imaging during cycloergometer exercise (TET) and high dose dipyridamole-echocardiography test (DET: 2-D echo monitoring with dipyridamole infusion, up to 0.84 mg/kg in 10 min) were performed in 61 patients with chest pain syndrome. Criteria of positivity were: for TET, a reversible defect of perfusion, as quantitatively assessed by the postexercise and redistribution images; for DET, a transient dyssynergy of contraction, absent or of a lesser degree in resting conditions. All patients underwent coronary angiography; 38 had significant coronary artery disease (at least one major artery with > 70% luminal diameter narrowing). The sensitivity for detecting angiographically assessed coronary artery disease was 86% for TET and 79% for DET (p = NS); the specificity was, respectively, 56 and 100% (p <0.01). In 27 out of the 30 patients in whom both TET and DET yielded positive responses, the same myocardial region was involved. In conclusion, DET represents a reasonable diagnostic alternative to TET, showing a similar sensitivity and a higher specificity for the detection of angiographically assessed coronary artery disease. DET needs an acceptable acoustic window to be performed: it is however less expensive than TET, requires a much shorter imaging time and can also be performed in patients unable to exercise.

Original languageEnglish
Pages (from-to)85-92
Number of pages8
JournalAmerican Journal of Noninvasive Cardiology
Volume3
Issue number2-3
Publication statusPublished - 1989

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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