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Myocardial ischaemia in systemic lupus erythematosus: detection and clinical relevance

Wojciech Płazak1, Krzysztof Gryga, Jan Sznajd

  • 1Department of Cardiac and Vascular Diseases, John Paul II Hospital, Jagiellonian University Medical College, Krakow, Poland. wplazak@szpitaljp2.krakow.pl

Kardiologia Polska
|November 18, 2011
PubMed

Insights

Systemic lupus erythematosus (SLE) patients often have myocardial perfusion defects, detectable by SPECT. Exercise ECG shows high specificity for detecting ischemia, while echocardiography and resting ECG are less sensitive in SLE patients.

Area of Science:

  • Cardiology
  • Rheumatology
  • Medical Imaging

Background:

  • Systemic lupus erythematosus (SLE) is associated with severe cardiovascular complications, a leading cause of mortality.
  • Myocardial ischemia detection is crucial for managing SLE patients.

Purpose of the Study:

  • To evaluate echocardiography, ECG, and coronary artery calcium scoring (CACS) for detecting myocardial ischemia in SLE patients.
  • To compare these methods against single photon emission computerised tomography (SPECT).
  • To assess a five-year follow-up of SLE patients.

Main Methods:

  • 50 SLE patients underwent clinical assessment, resting and exercise ECG, echocardiography, CACS, and SPECT (Tc-99m sestamibi).
  • Patients were followed for five years post-assessment.

Main Results:

  • SPECT revealed perfusion defects in 50% of SLE patients; 36% had persistent defects.
  • Exercise ECG demonstrated 68% sensitivity and 100% specificity for myocardial ischemia detection compared to SPECT.
  • Coronary calcifications were observed in 24% of patients; CACS had 28% sensitivity and 58% specificity.

Conclusions:

  • SPECT identifies myocardial perfusion defects in approximately half of young, predominantly female, SLE patients.
  • Exercise ECG is a highly specific tool for identifying ischemia in SLE patients, even when resting ECG and echocardiography are normal.
  • While prognosis is good with negative SPECT, patients with perfusion defects and coronary calcifications may develop ischemia symptoms; low calcium scores (<150) indicate low short-term atherosclerosis progression risk.
Abstract

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