To verify the accuracy of the nursing diagnosis, decreased cardiac tissue perfusion, in patients with coronary artery disease. METHODS: Clinical validation consisted of evaluation by 75 participants. Sensitivity and specificity measurements were performed by means of latent class analysis. RESULTS: The prevalence of the diagnosis was 64.5%. Nausea, dizziness, and vomiting were sensitive and specific; altered heart rate was specific. CONCLUSION: Four indicators were accurate for the nursing diagnosis. IMPLICATIONS FOR NURSING: Accurate defining characteristics contribute to reliable and precise assessment and enable nurses to diagnose and intervene in the outcome of the patient's clinical condition Ver menos