In-depth

Complications

Stroke

Stroke occurs when the blood supply to part of your brain is interrupted, depriving brain tissue of oxygen and nutrients. Stroke is a medical emergency.

Symptoms

Headache

Most headaches aren't caused by a serious illness, but some could be a sign of a life-threatening condition.

Tests and diagnosis

CT angiogram

A computerized tomography (CT) angiogram could tell if your heart's arteries are blocked. These tests aren't for everyone, and some experts worry about radiation risks.

CT scan

A CT scan is an imaging test that uses X-rays to produce detailed images of the inside of your body.

MRI

MRI uses a magnetic field and radio waves to create detailed images of the organs and tissues within your body.

Ultrasound

Ultrasound imaging uses high-frequency sound waves to create images of structures in your body.

Treatments and drugs

Carotid angioplasty and stenting

Carotid angioplasty and stenting — Overview covers definition, risks and results of this stroke treatment.

Oct. 01, 2011