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The study is aimed at the investigation of the association of biomarkers of circadian rhythms with sleep characteristics and stroke outcome in acute stroke patients. It is designed as an observational cohort study with the retrospective and prospective longitudinal arms.
In the retrospective arm of the study, the routinely collected data of patients admitted to the stroke unit with acute ischemic stroke (from 2018 till 2022) will be evaluated. In the prospective longitudinal arm, about 200-250 patients admitted to the Stroke Unit of one participating center will undergo examination including the assessment of medical records, stroke characteristics, sleep characteristics and blood sampling for the evaluation of genetic biomarkers of circadian rhythms within the first 2-3 days after admission.The assessment of stroke severity and functional deficit will be repeated at 10-14 days after stroke.
The following associations will be assessed:
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Retrospective cohort | Patients with acute ischemic stroke admitted to the Stroke Unit of one participating center in 2018-2022. The data collected within clinical routine will be analyzed including stroke characteristics at baseline and at discharge (10-14 days after admission), neuroimaging data, sleep characteristics (routine polygraphy study), heart rate variability, routine blood tests. |
| |
| Prospective cohort | Approximately 200-250 patients with acute ischemic stroke admitted to the Stroke Unit of one participating center in 2022-2024 will undergo the assessment of medical records, stroke characteristics, the assessment of sleep characteristics and blood sampling for the evaluation of genetic biomarkers of circadian rhythms at baseline (within 2-3 days of admission) and at 10-14 days (at discharge). |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| No intervention is planned | Other | No intervention is planned |
|
| Measure | Description | Time Frame |
|---|---|---|
| Change in the value of National Institutes of Health Stroke Scale from baseline to 14th day after inclusion | National Institutes of Health Stroke Scale (NIHSS) is a tool used to objectively quantify the impairment caused by a stroke, 0-42 scores, higher scores characterize worse impairment | From baseline to 14th day after treatment initiation |
| Stroke-related disability assessed by the change in modified Rankin scale from baseline to 14th day after treatment initiation | values of modified Rankin scale (scale for measuring the degree of disability or dependence in the daily activities of people who have suffered a stroke, from 0 (no symptoms) to 6 (dead) points) | From baseline to 14th day after treatment initiation |
| Stroke-related disability assessed by the change in Rivermead Mobility Index from baseline to 14th day after treatment initiation | a standardized scale used to assess mobility in patients with neurological deficits, a maximum of 15 points is possible; higher scores indicate better mobility performance | From baseline to 14th day after treatment initiation |
| Stroke-related disability assessed by the change in Barthel Index from baseline to 14th day after treatment initiation | a common scale used to measure performance in activities of daily living, 0-100 scores, higher scores define better performance | From baseline to 14th day after treatment initiation |
| Measure | Description | Time Frame |
|---|---|---|
| Sleep quality assessed by Pittsburgh Sleep Quality Index | Pittsburgh Sleep Quality Index is a self-rated questionnaire which assesses sleep quality and disturbances over the last (previous) 1-month (a retrospective assessment) time interval, Each of the sleep components yields a score ranging from 0 to 3, with 3 indicating the greatest dysfunction. The sleep component scores are summed to yield a total score ranging from 0 to 21 with the higher total score indicating worse sleep quality |
| Measure | Description | Time Frame |
|---|---|---|
| sleep-related respiratory characteristics: apnea-hypopnea index | assessed by routine polygraphy: apnea-hypopnea index (higher values indicate greater severity; <5 episodes/h - normal, >=5 episodes/h - pathological) | Baseline |
| sleep-related respiratory characteristics: oxygen desaturation index |
Inclusion Criteria:
Exclusion Criteria:
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Participants will be recruited from the patients with confirmed acute ischemic stroke admitted to the Stroke Unit
| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Lyudmila Korostovtseva, MD, PHD | Contact | +79217873548 | lyudmila_korosto@mail.ru |
| Name | Affiliation | Role |
|---|---|---|
| Lyudmila Korostovtseva, MD, PhD | Almazov National Medical Research Centre | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Almazov National Medical Research Centre | Recruiting | Saint Petersburg | 197341 | Russia |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 34191267 | Background | Korostovtseva L. Ischemic Stroke and Sleep: The Linking Genetic Factors. Cardiol Ther. 2021 Dec;10(2):349-375. doi: 10.1007/s40119-021-00231-9. Epub 2021 Jun 30. | |
| 31317919 | Background | Bochkarev MV, Korostovtseva LS, Medvedeva EA, Rotar OP, Sviryaev YV, Zhernakova YV, Shalnova SA, Konradi AO, Chazova IE, Boitsov SA, Shlyakhto EV. [Sleep disorders and stroke: data of the esse-rf study]. Zh Nevrol Psikhiatr Im S S Korsakova. 2019;119(4. Vyp. 2):73-80. doi: 10.17116/jnevro201911904273. Russian. |
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whole blood, serum, saliva
| Baseline |
| Sleepiness assessed by Epworth Sleepiness Scale | a common tool to assess sleepiness; 0-24 points, higher score indicate greater sleepiness | Baseline |
| Fatigue assessed by Fatigue severity Scale | a common 9-item tool used to determine and quantify fatigue as subjective feeling of exhaustion, persisting lack of energy and rapid inanition, 9-63 points, higher score indicates more severe fatigue | Baseline |
| Insomnia assessed by Insomnia severity index | a 7-item tool to assess the severity of insomnia, 0-5 points per each item, higher score indicates more severe insomnia | Baseline |
| Chronotype assessed by Morningness-Eveningness Questionnaire | a common 19-item tool to estimate individual chronotype, a score ranging from 16 to 86; scores of 41 and below indicate "evening types", scores of 59 and above indicate "morning types", scores between 42-58 indicate "intermediate types" | Baseline |
assessed by routine polygraphy: oxygen desaturation index (higher values indicate greater severity; <5 episodes/h - normal, >=5 episodes/h - pathological) |
| Baseline |
| sleep-related respiratory characteristics: time under oxygen saturation <90% | assessed by routine polygraphy: time under oxygen saturation <90% (higher values indicate greater severity), in minutes | Baseline |
| sleep-related respiratory characteristics: average oxygen saturation | assessed by routine polygraphy: average oxygen saturation (lower values indicate greater severity), in % | Baseline |
| sleep-related respiratory characteristics: lowest oxygen saturation | assessed by routine polygraphy: lowes oxygen saturation (lower values indicate greater severity), in % | Baseline |
| Nocturnal heart rate variability characteristics derived from nocturnal pulseoximeter data: standard deviation of normal-to-normal intervals | standard deviation of normal-to-normal intervals (msec) | Baseline |
| Nocturnal heart rate variability characteristics derived from nocturnal pulseoximeter data: number of interval differences of successive heart beats greater than 50 ms | number of interval differences of successive heart beats greater than 50 ms | Baseline |
| Nocturnal heart rate variability characteristics derived from nocturnal pulseoximeter data: spectral power in high-frequency power bands | spectral power in high-frequency power bands (Hz) | Baseline |
| Nocturnal heart rate variability characteristics derived from nocturnal pulseoximeter data: spectral power in low-frequency power bands | spectral power in low-frequency power bands (Hz) | Baseline |
| Sleep duration assessed by polysomnography | Sleep duration (minutes) | Baseline |
| Sleep efficiency assessed by polysomnography | sleep efficiency (%) | Baseline |
| Sleep latency assessed by polysomnography | sleep latency (minutes) | Baseline |
| Sleep S1 stage duration assessed by polysomnography | S1 sleep stage percentage of total sleep time (%) | Baseline |
| Sleep S2 stage duration assessed by polysomnography | S2 sleep stage percentage of total sleep time (%) | Baseline |
| Sleep S3 stage duration assessed by polysomnography | S3 sleep stage percentage of total sleep time (%) | Baseline |
| Rapid eye movement (REM) stage duration assessed by polysomnography | Rapid eye movement (REM) sleep stage percentage of total sleep time (%) | Baseline |
| Wake after sleep onset time assessed by polysomnography | wake after sleep onset time (minutes), higher values indicate worse disturbance | Baseline |
| Arousal index assessed by polysomnography | Arousal index (episodes/hour of sleep), higher values indicate worse disturbance | Baseline |
| periodic limb movement index assessed by polysomnography | periodic limb movement index (episodes/hour of sleep), higher values indicate worse disturbance | Baseline |
| Stroke lesion volume | Stroke lesion volume assessed by neuroimaging (computer tomography scan or magnetic resonance imaging) (ml or mm3) | Baseline |
| 30635478 | Background | Seiler A, Camilo M, Korostovtseva L, Haynes AG, Brill AK, Horvath T, Egger M, Bassetti CL. Prevalence of sleep-disordered breathing after stroke and TIA: A meta-analysis. Neurology. 2019 Feb 12;92(7):e648-e654. doi: 10.1212/WNL.0000000000006904. Epub 2019 Jan 11. |
| ID | Term |
|---|---|
| D000083242 | Ischemic Stroke |
| D012893 | Sleep Wake Disorders |
| D060825 | Cognitive Dysfunction |
| D012891 | Sleep Apnea Syndromes |
| ID | Term |
|---|---|
| D020521 | Stroke |
| D002561 | Cerebrovascular Disorders |
| D001927 | Brain Diseases |
| D002493 | Central Nervous System Diseases |
| D009422 | Nervous System Diseases |
| D014652 | Vascular Diseases |
| D002318 | Cardiovascular Diseases |
| D009461 | Neurologic Manifestations |
| D012816 | Signs and Symptoms |
| D013568 | Pathological Conditions, Signs and Symptoms |
| D001523 | Mental Disorders |
| D003072 | Cognition Disorders |
| D019965 | Neurocognitive Disorders |
| D001049 | Apnea |
| D012120 | Respiration Disorders |
| D012140 | Respiratory Tract Diseases |
| D020919 | Sleep Disorders, Intrinsic |
| D020920 | Dyssomnias |
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