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Serious cardiac arrhythmias after stroke: incidence, time course, and predictors--a systematic, prospective analysis
Bernd Kallmünzer1, Lorenz Breuer, Nicolas Kahl
1Department of Neurology, University Medical Center Erlangen, Schwabachanlage 6, 91054 Erlangen, Germany.
Insights
Cardiac arrhythmias are common after acute cerebrovascular events, peaking within 24 hours. Higher age and stroke severity predict arrhythmia risk, guiding monitoring strategies.
Area of Science:
- Cardiology
- Neurology
- Clinical Medicine
Background:
- Acute cerebrovascular events (e.g., stroke) increase patient susceptibility to cardiac arrhythmias.
- Limited data exists on the temporal patterns and predictors of these arrhythmias.
Purpose of the Study:
- To investigate the incidence, time course, and determinants of cardiac arrhythmias in patients with acute cerebrovascular events.
- To assess the need for urgent evaluation and treatment of arrhythmias within the first 72 hours post-admission.
Main Methods:
- Prospective Stroke-Arrhythmia-Monitoring-Database (SAMBA) study involving 501 acute neurovascular patients.
- Systematic detection of arrhythmias via structured processing of telemetric data in a monitored stroke unit.
- Investigation of arrhythmia onset timing and predisposing factors.
Main Results:
- Significant cardiac arrhythmias occurred in 25.1% of patients, with highest incidence in the first 24 hours.
- Serious arrhythmic tachycardia was more prevalent than bradycardic arrhythmias.
- Arrhythmias were independently associated with older age and more severe neurological deficits (NIH Stroke Scale).
Conclusions:
- The risk of significant cardiac arrhythmia post-acute cerebrovascular event is highest within the initial 24 hours and decreases over the first 3 days.
- The National Institutes of Health Stroke Scale, alongside vascular risk factors, can aid in stratifying monitoring needs.
Background And Purpose:
Patients with acute cerebrovascular events are susceptible to serious cardiac arrhythmias, but data on the time course and the determinants of their onset are scarce.
Methods:
The prospective Stroke-Arrhythmia-Monitoring-Database (SAMBA) assessed cardiac arrhythmias with need for urgent evaluation and treatment in 501 acute neurovascular patients during the first 72 hours after admission to a monitored stroke unit. Arrhythmias were systematically detected by structured processing of telemetric data. Time of arrhythmia onset and predisposing factors were investigated.
Results:
Significant cardiac arrhythmias occurred in 25.1% of all patients. Incidence was highest during the first 24 hours after admission. Serious arrhythmic tachycardia (ventricular or supraventricular>130 beats/min) was more frequent than bradycardic arrhythmia (sinus-node dysfunction, bradyarrhythmia, or atrioventricular block °II and °III). Arrhythmias were independently associated with higher age and severer neurological deficits as measured by the National Institutes of Health Stroke Scale on admission.
Conclusions:
The risk for significant cardiac arrhythmia after an acute cerebrovascular event is highest during the first 24 hours of care and declines with time during the first 3 days. Along with established vascular risk factors, the National Institutes of Health Stroke Scale may be considered for a stratified allocation of monitoring capabilities.
Clinical Trial Registration:
URL: www.clinicaltrials.gov. Unique identifier: NCT01177748.