Coronary artery disease and revascularization associated with immune checkpoint blocker myocarditis: Report from an international registry

Eur J Cancer. 2022 Dec:177:197-205. doi: 10.1016/j.ejca.2022.07.018. Epub 2022 Aug 24.

Abstract

Purpose: Immune checkpoint blocker (ICB) associated myocarditis (ICB-myocarditis) may present similarly and/or overlap with other cardiac pathology including acute coronary syndrome presenting a challenge for prompt clinical diagnosis.

Methods: An international registry was used to retrospectively identify cases of ICB-myocarditis. Presence of coronary artery disease (CAD) was defined as coronary artery stenosis >70% in patients undergoing coronary angiogram.

Results: Among 261 patients with clinically suspected ICB-myocarditis who underwent a coronary angiography, CAD was present in 59/261 patients (22.6%). Coronary revascularization was performed during the index hospitalisation in 19/59 (32.2%) patients. Patients undergoing coronary revascularization less frequently received steroids administration within 24 h of admission compared to the other groups (p = 0.029). Myocarditis-related 90-day mortality was 9/17 (52.7%) in the revascularised cohort, compared to 5/31 (16.1%) in those not revascularized and 25/156 (16.0%) in those without CAD (p = 0.001). Immune-related adverse event-related 90-day mortality was 9/17 (52.7%) in the revascularized cohort, compared to 6/31 (19.4%) in those not revascularized and 31/156 (19.9%) in no CAD groups (p = 0.007). All-cause 90-day mortality was 11/17 (64.7%) in the revascularized cohort, compared to 13/31 (41.9%) in no revascularization and 60/158 (38.0%) in no CAD groups (p = 0.10). After adjustment of age and sex, coronary revascularization remained associated with ICB-myocarditis-related death at 90 days (hazard ratio [HR] = 4.03, 95% confidence interval [CI] 1.84-8.84, p < 0.001) and was marginally associated with all-cause death (HR = 1.88, 95% CI, 0.98-3.61, p = 0.057).

Conclusion: CAD may exist concomitantly with ICB-myocarditis and may portend a poorer outcome when revascularization is performed. This is potentially mediated through delayed diagnosis and treatment or more severe presentation of ICB-myocarditis.

Keywords: Acute coronary syndrome; Coronary revascularization; Immune checkpoint blockers; Immune-related adverse events; Myocarditis.

Publication types

  • Research Support, N.I.H., Extramural

MeSH terms

  • Coronary Artery Disease* / diagnostic imaging
  • Coronary Artery Disease* / therapy
  • Humans
  • Immune Checkpoint Inhibitors
  • Myocarditis* / drug therapy
  • Prognosis
  • Registries
  • Retrospective Studies
  • Risk Factors

Substances

  • Immune Checkpoint Inhibitors