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The most common cause of cardiac syncope is cardiac arrhythmia (abnormal heart rhythm) wherein the heart beats too slowly, too rapidly, or too irregularly to pump enough blood to the brain. [9] Some arrhythmias can be life-threatening. [9] Two major groups of arrhythmias are bradycardia and tachycardia. Bradycardia can be caused by heart blocks.
A hypertensive emergency is very high blood pressure with potentially life-threatening symptoms and signs of acute damage to one or more ... vomiting, or syncope. ...
Reflex syncope can occur in otherwise healthy individuals, and has many possible causes, often trivial ones such as prolonged standing with the legs locked. [citation needed] The main danger of vasovagal syncope (or dizzy spells from vertigo) is the risk of injury by falling while unconscious.
Some of these conditions can be minor, while others can be life-threatening. Coronary Artery Disease. Coronary artery disease is the most common type of heart disease. It’s strongly linked to:
Heat syncope is fainting or dizziness as a result of overheating (syncope is the medical term for fainting). It is a type of heat illness. The basic symptom of heat syncope is fainting, with or without mental confusion. [1] Heat syncope is caused by peripheral vessel dilation, resulting in diminished blood flow to the brain and dehydration.
In patients treated with beta blockers, life-threatening arrhythmias are more likely if a person had already survived a cardiac arrest, had a syncope, or are carriers of disease-causing mutations affecting the highly conserved terminal portion of RYR2 gene, [25] called the C-terminal domain (amino acids 4889–4969). [30]
People with high blood pressure who slept for shorter durations were more likely to show poor cognitive function and increased levels of markers of brain aging and injury, a new study has found.
The other is the fact that the first sign may be a life-threatening allergic reaction known as anaphylaxis (think: throat-swelling, difficulty breathing) in people who develop the condition, often ...