Cardiovascular Health: Thrombosis and Stroke Awareness

Understanding Thrombosis and Stroke

Thrombosis refers to blood-clot formation inside blood vessels. These clots may obstruct blood flow (leading to ischemia) or break loose and travel (causing embolism). Venous thromboembolism, which includes deep-vein thrombosis and pulmonary embolism, is a major cause of hospital mortality. Arterial thrombosis causes heart attacks and ischemic strokes. Globally, heart attack and stroke are top cardiovascular killers, and thrombosis is the common mechanism. Risk factors include prolonged immobility, surgery, cancer, pregnancy, hormonal therapy, obesity, smoking and inherited clotting disorders.

A stroke occurs when blood flow to the brain is interrupted (ischemic) or when a vessel ruptures (hemorrhagic). Ischemic strokes account for about 87 % of cases. Stroke rates in Canada are rising due to population ageing and increased strokes among younger adults. Stroke can occur at any age: one baby has a stroke every day in Canada, and more than 10 000 children live with stroke. Pregnancy increases risk—about 30 per 100 000 women experience a stroke during pregnancy or postpartum. Traditional risk factors such as hypertension, hyperlipidaemia, diabetes and obesity remain dominant, but emerging risks include air pollution and chronic stress.

Impact and Burden in Canada

Stroke is the fourth leading cause of death in Canada. With improved acute care, more people survive strokes, but 60 % of survivors have some disability. More than 40 % live with moderate to severe disability. Approximately nine in ten Canadians have at least one risk factor for heart disease or stroke, yet 80 % of premature strokes and heart disease cases could be prevented through healthy behaviours. Although comprehensive national data on thrombosis are limited, the global statistic that one in four deaths is linked to thrombosis underscores its significance.

Prevention and Awareness

For thrombosis, awareness of risk factors and symptoms is vital. Preventive measures include maintaining mobility during long trips, using prophylactic anticoagulants during and after hospitalisation, and encouraging smoking cessation. For stroke, the FAST acronym (Face drooping, Arm weakness, Speech difficulty, Time to call 911) helps bystanders recognise signs and act quickly. Rapid thrombolytic therapy or mechanical thrombectomy greatly improves outcomes. Community blood-pressure screening, smoking-cessation programmes and dietary interventions are cost-effective prevention strategies. Rural and Indigenous communities often face shortages of specialists and diagnostic equipment; tele-stroke programmes can connect remote hospitals with stroke specialists to facilitate timely interventions.

Research and Future Directions

Research focuses on refining anticoagulant therapies, developing safer clot-dissolving drugs and employing artificial intelligence to predict stroke risk. Wearable devices that detect atrial fibrillation can identify patients who may benefit from preventive anticoagulation. Genetic studies aim to uncover why some individuals are more prone to thrombosis. However, an environmental scan of Canadian AI initiatives notes that most projects are concentrated in hospitals and remain at pilot stages, leaving community settings underrepresented.

Thrombosis and stroke are formidable threats, but awareness and preventive action can drastically reduce their toll. By supporting public campaigns, ensuring equitable access to preventive care and integrating technological innovations with clinician expertise, Canada can translate October’s observances into meaningful cardiovascular-health gains.

References

Heart & Stroke Foundation. (2025). Stroke Month 2025 backgrounder heartandstroke.ca.
International Society on Thrombosis and Haemostasis. (2024). World Thrombosis Day: Our story worldthrombosisday.org.
Statistics Canada. (2025). AI in action: Transforming clinical care across Canada digitalhealthcanada.com.