Cited by 360Cardiovascular Syncope and Autonomic DisordersCardiac electrophysiology and arrhythmiasHeart Rate Variability and Autonomic Control

The DOI matches its Crossref record; 27 of the 27 references it cites were found in a registry or an index.

Use of an Extended Monitoring Strategy in Patients With Problematic Syncope

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Krahn, Andrew D., Klein, George J., Yee, Raymond, Takle-Newhouse, Teri, Norris, Caro·1999·Circulation

Abstract

Background —The conventional investigation of patients who present with syncope involves short-term ECG monitoring or provocative testing with head-up tilt and electrophysiological testing. A symptom-rhythm correlation is often difficult to obtain during spontaneous syncope because of its sporadic, infrequent, and unpredictable nature. Methods and Results —We used a prolonged monitoring strategy to determine the cause of syncope in 85 patients (age, 59±18 years; 44 men) with recurrent undiagnosed syncope with an implantable loop recorder capable of cardiac monitoring for up to 18 months. During a mean of 10.5±4.0 months of follow-up, symptoms recurred in 58 patients (68%) 71±79 days (2.3±2.6 months) after implantable loop recorder insertion. An arrhythmia was detected in 42% of patients who recorded a rhythm during recurrent symptoms, with bradycardia present in 18 and tachycardia in 3. Five of the 18 bradycardic patients and 2 additional sinus rhythm patients received a clinical diagnosis of neurally mediated syncope. Patients who experienced presyncope were much less likely to record an arrhythmia during symptoms compared with recurrence of syncope (24% versus 70%, P =0.0005). There were no adverse events associated with recurrent symptoms, and there were no sudden deaths. Inability to freeze after an event occurred in 8 patients, and pocket infection occurred in 3. Conclusions —The strategy of prolonged monitoring is effective and safe in patients with problematic syncope.

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  1. 10.1161/circ.92.5.1332 · DOI
  2. 10.1161/circ.92.7.1819 · DOI

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Metadata

Authors
Krahn, A. D., Klein, G. J., Yee, R., Takle-Newhouse, T., & Norris, C.
Affiliations
  • Western University (CA)
  • From the Division of Cardiology, University of Western Ontario, London, Ontario, Canada, and Medtronic, Minneapolis, Minn (T.T.-N.).
Venue
Circulation
Published
1999-01-26
Volume
99
Issue
3
Pages
406-410
ISSN
  • 0009-7322 (ISSN-L)
  • 1524-4539
OpenAlex
W2006949147
Cited by
360
References
27
Citations by year
2026: 1 · 2025: 2 · 2024: 10 · 2023: 5 · 2022: 3 · 2021: 7 · 2020: 5 · 2019: 6 · 2018: 12 · 2017: 22 · 2016: 12 · 2015: 13 · 2014: 13 · 2013: 17 · 2012: 9
FWCI
24.90
Type
journal article
Language
en
Open access
Locations
  • Circulation (publishedVersion)
  • PubMed (publishedVersion)
Funders
Heart and Stroke Foundation of Canada
Topics
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiovascular Syncope and Autonomic Disorders
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiac electrophysiology and arrhythmias
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Heart Rate Variability and Autonomic Control
Keywords
syncope, implantable loop recorder, prolonged cardiac monitoring, arrhythmia detection, neurally mediated syncope, bradycardia, tachycardia, presyncope, recurrent syncope
MeSH terms
Adult, Aged, Arrhythmias, Cardiac, Female, Humans, Male, Middle Aged, Recurrence, Syncope, Electrocardiography, Ambulatory, Tilt-Table Test, Prostheses and Implants

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