Related Experiment Videos
[Transitory carotid ischemic attacks: clinical and pathogenic aspects]
E Fiorini1, F Regli, J Bogousslavsky
1Service de neurologie, Centre hospitalier universitaire vaudois, Lausanne.
Insights
This study on carotid transient ischemic attacks (TIA) found common risk factors like hypertension and smoking. Atherosclerosis is a frequent cause, and some TIAs were linked to cerebral infarction.
Area of Science:
- Neurology
- Vascular Medicine
- Cardiology
Background:
- Transient ischemic attacks (TIAs) are critical indicators of cerebrovascular disease.
- Understanding the clinical profile and underlying mechanisms of carotid TIAs is essential for effective prevention and treatment.
Purpose of the Study:
- To elucidate the clinical characteristics of carotid transient ischemic attacks (TIAs).
- To investigate the pathological mechanisms contributing to TIAs in a hospitalized patient cohort.
- To identify prevalent risk factors and etiological pathways associated with TIAs.
Main Methods:
- Retrospective analysis of 117 patients hospitalized for TIAs.
- Clinical data collection including demographics, cardiovascular risk factors, and neurological symptoms.
- Cerebral infarction confirmation using CT-Scan and assessment of lesion characteristics.
- Categorization of TIAs based on affected brain hemisphere and presence of retinal symptoms.
Main Results:
- Male predominance observed in most age groups, with exceptions in the youngest and oldest cohorts.
- Key risk factors identified: arterial hypertension, smoking, hyperlipidemia, intermittent claudication, and elevated hematocrit (>46%).
- Cerebral infarction was confirmed in 17% of patients with hemispheric and mixed TIAs.
- Atherosclerotic causes were more prevalent in mixed and retinal TIAs compared to hemispheric TIAs.
- Cardiac embolism accounted for 11% of TIAs as an individual cause and 5% when associated with carotid atherosclerosis.
Conclusions:
- Carotid TIAs present with distinct clinical features and are associated with significant cardiovascular risk factors.
- Atherosclerosis is a major contributor, particularly in mixed and retinal TIAs, potentially due to more severe stenosis.
- Cerebral infarction is a common complication, underscoring the severity of these events.
- Cardiac embolism represents a notable, albeit less frequent, pathogenic mechanism.
Abstract:
The aim of this study is to describe the clinical characteristics and the pathological mechanisms of carotid transient ischemic attacks (TIA) in 117 patients which were hospitalised for such symptoms. Our results show a male predominance, except for age group under 40 and over 79 years. The principal cardiovascular index and risk factors are: arterial hypertension, smoking, hyperlipidemia, vascular intermittent claudication and hematocrit greater than 46%. Amongst our patients, 17% with hemispherical and mixed TIAs had a cerebral infarction proved by CT-Scan, the recent aspect and localisation of which were compatible with symptoms. The atherosclerotic causes are more frequently associated with mixed and retinal TIAs than hemispheric TIAs. This fact may be attributed to a larger proportion of stenotic atherosclerotic lesions by mixed TIAs than hemispheric ones. The cardiac embolic pathogenic mechanism is responsible for 11% of TIAs if considered individually; of 5% if associated with carotid atherosclerosis.