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A N Sumin1, E V Korok, A A Korotkevitch

  • 1Research Institute for Complex Issues of Cardiovascular Disease. an_sumin@mail.ru.

Kardiologiia
|February 4, 2019
PubMed
Summary

Single-photon emission computed tomography (SPECT) effectively detects obstructive coronary artery (CA) lesions in patients with ischemic heart disease (IHD) when appropriate use criteria are met. However, SPECT

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Area of Science:

  • Cardiovascular Imaging
  • Nuclear Cardiology
  • Diagnostic Accuracy

Background:

  • Ischemic heart disease (IHD) diagnosis relies on identifying obstructive coronary artery (CA) lesions.
  • Single-photon emission computed tomography (SPECT) is a key imaging modality for assessing CA stenosis.
  • Adherence to appropriate use criteria (AUC) may influence SPECT's diagnostic performance.

Purpose of the Study:

  • To evaluate the diagnostic capabilities of SPECT in detecting obstructive CA lesions.
  • To assess how SPECT's performance varies based on adherence to AUC for IHD patients.

Main Methods:

  • Retrospective analysis of 107 IHD patients undergoing both coronary angiography (CAG) and SPECT.
  • Patients categorized into two groups based on SPECT AUC score (appropriate vs. uncertain/inappropriate).
  • Comparison of SPECT findings with CAG results for hemodynamically significant CA stenoses.

Main Results:

  • Patients with appropriate SPECT indications (Group 1) showed a higher prevalence of obstructive CA lesions (63.6%) compared to those with uncertain/inappropriate indications (Group 2, 21.1%).
  • SPECT demonstrated higher sensitivity for detecting stenoses >70% in the left anterior descending artery in Group 1.
  • While specificity was high in both groups (83% in Group 1, 93% in Group 2), overall sensitivity for detecting significant CA lesions was low (40% vs. 25%).

Conclusions:

  • SPECT imaging is more likely to detect obstructive CA lesions in IHD patients with clear indications.
  • Despite high specificity, SPECT's sensitivity for diagnosing significant CA lesions remains low, irrespective of AUC adherence.
  • Clinical assessment remains crucial for guiding SPECT utilization in IHD.

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