What is a stroke?

A stroke is defined as a medical condition that occurs when the blood supply to a part of the brain is interrupted or reduced, preventing brain tissue from getting the necessary oxygen and nutrients. This can be caused by either a blood clot blocking a blood vessel (ischemic stroke) or a ruptured blood vessel leading to bleeding in or around the brain (hemorrhagic stroke). The immediate impact of a stroke can result in serious neurological damage, which can affect speech, movement, and other bodily functions, depending on the area of the brain that is affected.

Understanding that a stroke results directly from issues with blood circulation in the brain is crucial for recognizing the symptoms and the need for urgent medical intervention. This knowledge is pivotal for anyone trained in emergency response, such as lifeguards who may encounter situations where rapid recognition and action can save lives.