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The additional prognostic value of myocardial perfusion SPECT in patients with known coronary artery disease with high exercise capacity

  • Thais R. PeclatEmail author
  • Ana Carolina do A. H. de Souza
  • Victor F. Souza
  • Aline M. K. Nakamoto
  • Felipe M. Neves
  • Izabella C. R. Silva
  • Ronaldo S. L. Lima
Original Article
  • 15 Downloads

Abstract

Background

The prognostic value of myocardial perfusion imaging (MPI) in patients with known coronary artery disease (CAD) and high exercise capacity is still unknown. We sought to determine the MPI additional prognostic value over electrocardiography (ECG) stress testing alone in patients with known CAD who achieved ≥ 10 metabolic equivalents (METs).

Methods and Results

We evaluated 926 patients with known CAD referred for MPI with exercise stress. Patients were followed for a mean of 32.4 ± 9.7 months for the occurrence of all-cause death or nonfatal myocardial infarction (MI). Those achieving ≥ 10 METs were younger, predominantly male, and had lower prevalence of cardiovascular risk factors. Patients reaching ≥ 10 METs had a lower annualized rate of hard events compared to their counterparts achieving < 10 METs (1.13%/year vs 3.95%/year, P < .001). Patients who achieved ≥ 10 METs with abnormal scans had a higher rate of hard events compared to those with normal scans (3.37%/year vs 0.57%/year, P = .023). Cardiac workload < 10 METs and an abnormal MPI scan were independent predictors of hard events.

Conclusions

MPI is able to stratify patients with known CAD achieving ≥ 10 METs for the occurrence of all-cause death and nonfatal MI, with incremental prognostic value over ECG stress test alone.

Keywords

CAD MPI SPECT ECG stress METs prognostic outcomes exercise capacity 

Abbreviations

MPI

Myocardial perfusion imaging

CAD

Coronary artery disease

METs

Metabolic equivalents

SPECT

Single photon emission computed tomography

MI

Myocardial infarction

CABG

Coronary artery bypass graft

PCI

Percutaneous coronary intervention

SSS

Summed stress score

SDS

Summed difference score

SRS

Summed rest score

Notes

Disclosure

The authors Thais R. Peclat, Ana Carolina do A. H. de Souza, Victor F. Souza, Aline M. K. Nakamoto, Felipe M. Neves, Izabella C. R. Silva, and Ronaldo S. L. Lima have nothing to disclose.

Supplementary material

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Supplementary material 1 (PPTX 759 kb)
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12350_2019_1960_MOESM3_ESM.docx (14 kb)
Supplementary material 3 (DOCX 14 kb)

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Copyright information

© American Society of Nuclear Cardiology 2019

Authors and Affiliations

  • Thais R. Peclat
    • 1
    Email author
  • Ana Carolina do A. H. de Souza
    • 1
  • Victor F. Souza
    • 1
  • Aline M. K. Nakamoto
    • 1
  • Felipe M. Neves
    • 1
  • Izabella C. R. Silva
    • 1
  • Ronaldo S. L. Lima
    • 1
    • 2
    • 3
  1. 1.Cardiology, Clementino Fraga Filho University HospitalFederal University of Rio de JaneiroRio de JaneiroBrazil
  2. 2.Fonte ImagemRio de JaneiroBrazil
  3. 3.Clínica de Diagnóstico por ImagemRio de JaneiroBrazil

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