Heart Block Overview Heart block is a type of arrhythmia that affects the electrical system of the heart and causes it to beat irregularly and slower than usual. A third degree heart block is the most serious type. It can lead to a cardiac arrest. This is due to a delay, obstruction, or disruption along the […]

Double Vision Overview Double vision occurs when a person sees a double image where there should only be one. The two images can be side by side, on top of one another, or both. It can happen for many reasons, including diabetes and a blow to the head. Double vision can affect balance, movement, and […]

Cardiac Arrest Overview Sudden cardiac arrest occurs when an electrical malfunction causes the heart to stop beating. It prevents blood flow to the organs, and this can be fatal without immediate treatment. Below, we look at what happens during sudden cardiac arrest, including the signs and symptoms and what to do next. We also explore […]

Gangrene Overview Gangrene occurs when a lack of oxygen-rich blood causes tissue to die in some part of the body, often the hands or feet. It is a serious condition that can result in amputation of a limb or death. It needs urgent treatment to halt the spread of tissue death as rapidly as possible. Diabetes is […]

Lightheadedness Overview A person can experience lightheadedness for a variety of reasons. These include hypotension, inner ear disorders, and illness. Lightheadedness is a feeling of faintness, dizziness, or being close to passing out. It can occur alongside vertigo, which affects balance and makes a person feel as though they or their surroundings are spinning. Although […]