Implantable Loop Recorders in Patients with Unexplained Syncope: Does Ethnic Background Influence Diagnostic Yield?

Majdi Halabi, Hagar Drimer-Shabtai, Inna Rosenfeld, Adi Sharabi-Nov, Mussa Saad, Ibrahim Marai, Ziad Abuiznait, Ayelet Armon-Omer, Zippi Regev-Avraham, Zeev Israeli

Research output: Contribution to journalArticlepeer-review


Background: Implantable loop recorders (ILRs) are a central tool in the evaluation of unexplained syncope. These devices record and store electrocardiograms, both automatically and on patient-dependent activation. Therefore, obtaining optimal diagnostic results relies on a patient's comprehension and collaboration. Objectives: To evaluate the effect of ethnic background and mother-tongue language on the diagnostic yield (DY) of ILRs. Methods: Patients at two medical centers in Israel, who had ILRs as part of syncope workup were included. Inclusion criteria were age over 18 years and an ILR for at least one year (or less if the cause of syncope was detected]. Patient demographics, ethnic background, and previous medical history were recorded. All findings from ILR recordings, activation mode (manual vs. automatic), and treatment decisions (none, ablation, device implantation) were collected. Results: The study comprised 94 patients, 62 Jews (i.e., ethnic majority) and 32 non-Jews (i.e., ethnic minority). While baseline demographic characteristics, medical history, and drug therapy were similar in both groups, Jewish patients were significantly older at the time of device implantation: 64.3 ± 16.0 years of age vs. 50.6 ± 16.9, respectively; (P < 0.001). Arrhythmias recorded in both groups as well as treatment decisions and device activation mode were similar. Total follow-up time from device implantation was longer in the non-Jewish vs. the Jewish group (17.5 ± 12.2 vs. 24.0 ± 12.4 months, respectively; P < 0.017). Conclusions: The DY of ILR implanted for unexplained syncope did not seem to be influenced by patient's mother-tongue language or ethnicity.

Original languageEnglish
Pages (from-to)426-429
Number of pages4
JournalIsrael Medical Association Journal
StatePublished - Jun 2023

Bibliographical note

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© 2023 Israel Medical Association. All rights reserved.


  • diagnostic yield
  • ethnicity
  • implantable loop recorders (ILR)
  • syncope


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