Delay in patients suspected of transient ischaemic attack: a cross-sectional study

Delays in Presentation Time Under the COVID-19 Epidemic in Patients With Transient Ischemic Attack and Mild Stroke: A Retrospective Study of Three Hospitals in a Japanese Prefecture

Background: Coronavirus Disease 2019 (COVID-19) has spread worldwide with collateral damage and therefore might affect the behavior of stroke patients with mild symptoms seeking medical attention.

Methods: Patients with ischemic stroke who were admitted to hospitals within 7 days of onset were retrospectively registered. The clinical characteristics, including onset-to-door time (ODT), of patients with a transient ischemic attack (TIA)/mild stroke (National Institutes of Health Stroke Scale [NIHSS] score of ≤ 3 on admission) or moderate/severe stroke were compared between those admitted from April 2019 to March 2020 (pre-COVID-19 period) and from April to September 2020 (COVID-19 period). Multivariable regression analysis was performed to identify factors associated with the ODT.

Results: Of 1,100 patients (732 men, median age, 73 years), 754 were admitted during the pre-COVID-19 period, and 346 were admitted during the COVID-19 period. The number and proportion of patients with TIA/minor stroke were 464 (61.5%) in the pre-COVID-19 period and 216 (62.4%) during the COVID-19 period. Among patients with TIA/mild stroke, the ODT was longer in patients admitted during the COVID-19 period compared with that of the pre-COVID-19 period (median 864 min vs. 508 min, p = 0.003). Multivariable analysis revealed the COVID-19 period of admission was associated with longer ODT (standardized partial regression coefficient 0.09, p = 0.003) after adjustment for age, sex, route of arrival, NIHSS score on admission, and the presence of hypertension, diabetes mellitus, and wake-up stroke. No significant change in the ODT was seen in patients with moderate/severe stroke.

Conclusions: The COVID-19 epidemic might increase the ODT of patients with TIA/mild stroke.

Understanding TIA: an ethnographic study of TIA consultations

BACKGROUND

Transient ischaemic attack (TIA) is a transient episode of neurological dysfunction. Rapid access TIA clinics have been set up as integrated 'one-stop' clinics that aim to investigate, diagnose, educate and implement treatment to reduce the risk of further TIA/stroke.

OBJECTIVE

This study aimed to examine how TIA consultations were conducted by observing the consultations and then interviewing patients.

METHODS

This ethnographic study observed fifteen patient-clinician consultations where a diagnosis of TIA was made within three different TIA outpatient clinics in the East Midlands. All fifteen patients, their accompanying family-members/carers and three stroke clinicians were interviewed. Data analysis was informed by the constant comparative approach.

RESULTS

There was considerable variation in the conduct of these consultations across sites and clinicians. This resulted in variation in patient experience and knowledge after the consultation including the ability to recognize TIA-associated risk factors and their management. As TIA symptoms resolve, patients may reduce their need to seek health care services in addition to demonstrating reduced concordance with secondary stroke prevention. Health professionals recognize that this single appointment provides patients with a large amount of information which may be difficult to process. Importantly, there was little discussion about future symptoms and how to respond. A management plan, which considered a patient's health belief, knowledge and encouraged the involvement of family members, improved information recall.

CONCLUSIONS

TIA is a complex medical diagnosis with multiple risk factors that may make the management complex and hence difficult for patients to undertake. Our findings found variability in the conduct, provision of information and patient understanding. Guidance on nationally agreed consultation framework may prove useful. Improved patient education may include individualized/sustained education utilizing multidisciplinary team members across family/primary and secondary care, video or greater online education and improved general public education.

Serum biomarkers in patients suspected of transient ischaemic attack in primary care: a diagnostic accuracy study

OBJECTIVE

The diagnosis of transient ischaemic attack (TIA) based on symptoms and signs can be challenging and would greatly benefit from a rapid serum biomarker of brain ischaemia. We aimed to quantify the added diagnostic value of serum biomarkers in patients suspected of TIA beyond symptoms and signs.

METHODS

This is a cross-sectional diagnostic accuracy study with a 6-month follow-up period. Participants were patients suspected of TIA by the general practitioner (GP) in whom a blood sample could be collected within 72 hours from symptom onset. A research nurse visited the participant for the blood sample and a standardised interview. The GP referred participants to the regional TIA service. An expert panel of three neurologists classified cases as TIA, minor stroke or any other diagnosis, based on all available diagnostic information including the GP's and neurologist's correspondence and the follow-up period. We used multivariable logistic regression analyses to quantify the diagnostic accuracy of clinical predictors and the improvement of accuracy by seven biomarkers (NR2, NR2 antibodies, PARK7, NDKA, UFD1, B-FABP and H-FABP).

RESULTS

206 patients suspected of TIA participated, of whom 126 (61.2%) were diagnosed with TIA (n=104) or minor stroke (n=22) by the expert panel. The median time from symptom onset to the blood sample collection was 48.0 (IQR 28.3-56.8) hours. None of the seven biomarkers had discriminative value in the diagnosis of TIA, with C-statistics ranging from 0.45 to 0.58. The final multivariable model (C-statistic 0.83 (0.78-0.89)) consisted of eight clinical predictors of TIA/minor stroke: increasing age, a history of coronary artery disease, sudden onset of symptoms, occurrence of symptoms in full intensity, dysarthria, no history of migraine, absence of loss of consciousness and absence of headache. Addition of the individual biomarkers did not further increase the C-statistics.

CONCLUSIONS

Currently available blood biomarkers have no added diagnostic value in suspected TIA.

TRIAL REGISTRATION NUMBER

NCT01954329.