Stroke warning signs

What is a stroke

A stroke is a sudden loss of brain function caused by interrupted blood flow or bleeding inside the brain. The two main types are ischemic stroke, caused by a clot that blocks an artery, and hemorrhagic stroke, caused by bleeding. A transient ischemic attack or TIA causes temporary symptoms that resolve, but it signals high short term risk for a full stroke.

At The NY Center for the Prevention of Heart Disease we focus on stroke as a preventable consequence of vascular risk factors such as high blood pressure, atrial fibrillation, and unmanaged cholesterol. Our approach combines risk assessment, lifestyle measures, and targeted medical therapy.

Why stroke warning signs matter in New York

Every minute counts with stroke because brain tissue is sensitive to low blood flow. In a dense urban area like New York, quick recognition and rapid transport to a hospital with stroke capabilities improves the chance of receiving treatments that reduce long term disability. People over 45, those with diabetes, hypertension, atrial fibrillation, or a family history of vascular disease are at higher risk.

We work with primary care physicians, neurologists, and hospitals across Manhattan, the Bronx, Queens, Brooklyn, Westchester, Long Island, and New Jersey to identify and manage those risks before an event occurs. When symptoms appear, the immediate priority is emergency care, followed by coordinated secondary prevention.

Key warning signs to know

Clinicians often teach the FAST memory aid for quick recognition. FAST stands for Face, Arms, Speech, Time. Time refers to acting immediately if any of those signs appear. We also note that TIAs can present with the same signs but resolve on their own; TIAs require urgent evaluation because they often precede stroke.

How clinicians evaluate suspected stroke

1. Initial assessment. Emergency responders and emergency clinicians check airway, breathing, circulation, blood glucose, and rapidly document the time symptoms began. A focused neurologic exam scores deficits and guides urgency.
2. Imaging. Noncontrast head CT is the common first imaging test to distinguish ischemic stroke from hemorrhage. MRI can provide more detail about small or posterior circulation strokes.
3. Blood tests and cardiac monitoring. Tests look for contributing factors such as clotting abnormalities, infection, or severe electrolyte imbalance. Cardiac monitoring and an EKG detect atrial fibrillation or other heart rhythm problems that can cause embolic stroke.
4. Treatment decisions. For ischemic stroke within specific time windows, treatments such as intravenous thrombolysis or mechanical thrombectomy can restore blood flow. Hemorrhagic stroke care focuses on stabilizing bleeding and blood pressure, and on neurosurgical evaluation when needed.
5. After the acute phase. Patients receive stroke subtype evaluation, secondary prevention planning, and rehabilitation referrals. Preventive cardiology plays a role in long term risk reduction through blood pressure control, cholesterol management, and rhythm management when appropriate.

Common mimics and how they differ

Not every sudden neurologic symptom is a stroke. Common mimics include hypoglycemia, migraine with aura, seizure, peripheral vestibular conditions, and conversion disorders. Key differences clinicians use include the pattern and duration of symptoms, blood glucose levels, prior neurologic history, and imaging findings. If symptoms are new, sudden, or unexplained, they warrant urgent evaluation to rule out stroke.

Prevention priorities we focus on

Prevention reduces the chance of first stroke and of recurrence after a TIA or stroke. Our preventive cardiology work emphasizes the highest impact areas below.

• Blood pressure control through lifestyle and medication when needed. High blood pressure is the leading modifiable risk factor for stroke.
• Atrial fibrillation detection and management, because AF can throw clots to the brain. See our Atrial Fibrillation Treatment page for how we evaluate rhythm issues.
• Cholesterol management, including when statin therapy and other lipid strategies are appropriate. Learn more on our Cholesterol Management page.
• Diabetes management and weight optimization to reduce vascular risk.
• Smoking cessation, regular aerobic activity, and a heart healthy diet to lower overall risk.

Medical treatment choices such as anticoagulation after atrial fibrillation, antiplatelet therapy after certain events, and the decision to pursue invasive tests or procedures are individualized. Those decisions balance stroke prevention benefits against bleeding risk and are made in collaboration with patients and referring providers.

Checklist for recognizing a possible stroke

Related services we offer

Our practice concentrates on preventing heart attack, stroke and sudden cardiac death through comprehensive risk management. Services that are most relevant to stroke prevention include preventive cardiology and rhythm care. For more on these services visit our Preventive Cardiology page, our Stroke Prevention page, and our Hypertension Management page. We also work closely on cholesterol strategies; see our Cholesterol Management page for details. For patients with known atrial fibrillation we coordinate treatment strategies as described on our Atrial Fibrillation Treatment page.

Locations we serve

We provide preventive cardiology care for adults across Manhattan, the Bronx, Queens, Brooklyn, Westchester, Long Island, New Jersey, and the greater New York metropolitan area. For an overview of our practice locations and how we coordinate with local hospitals and clinicians, see our Locations hub.

Helpful resources and further reading

Authoritative external resources can help you understand stroke and local systems of care. For general information on warning signs and when to seek care, the American Stroke Association maintains a patient oriented page on stroke symptoms. For clinical overviews the National Institute of Neurological Disorders and Stroke provides detailed guides on stroke types and treatment. The Centers for Disease Control and Prevention offers public health data and prevention guidance.