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Diagnosis of Occlusion Myocardial Infarction in Patients with Left Bundle Branch Block and Paced Rhythms

Muzamil Khawaja1, Janki Thakker1, Riyad Kherallah1

  • 1Department of Medicine, Baylor College of Medicine, Houston, USA.

Current Cardiology Reports
|November 18, 2021
PubMed

Insights

Diagnosing occlusion myocardial infarction (OMI) in patients with left bundle branch block (LBBB) or ventricular paced rhythms (VPR) is challenging. The Cai et al. algorithm, integrating clinical data with modified ECG criteria, is recommended for improved OMI diagnosis.

Area of Science:

  • Cardiology
  • Electrocardiography
  • Medical Diagnostics

Background:

  • Diagnosing occlusion myocardial infarction (OMI) in patients with left bundle branch block (LBBB) and ventricular paced rhythms (VPR) presents significant electrocardiographic (ECG) challenges.
  • Current guidelines lack specific recommendations for ECG criteria in these complex patient groups.

Purpose of the Study:

  • To review the difficulties in diagnosing OMI using ECG in patients with LBBB and VPR.
  • To evaluate the diagnostic performance of existing and newer ECG criteria.
  • To assess the impact of novel pacing modalities on OMI diagnosis.

Main Methods:

  • Review of existing literature on ECG criteria for OMI in LBBB and VPR.
  • Analysis of diagnostic performance of Sgarbossa and modified Sgarbossa criteria.
  • Discussion of emerging pacing technologies and their ECG implications.

Main Results:

  • Existing ECG criteria show variable diagnostic performance in LBBB and VPR patients.
  • Newer pacing modalities may alter ECG findings, complicating OMI detection.
  • Limited data exists on OMI detection with advanced pacing like biventricular or His-bundle pacing.

Conclusions:

  • The Cai et al. algorithm, combining clinical assessment with Smith Modified Sgarbossa ECG criteria, is recommended for suspected OMI in LBBB and right ventricular pacing.
  • Further research is needed on ECG diagnosis of OMI in patients with newer pacing modalities.
Abstract

Keywords:
Left bundle branch blockOcclusion myocardial infarctionRight ventricular pacingST-elevation myocardial infarctionSgarbossa criteriaSmith-modified Sgarbossa criteria

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