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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.
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.
Fainting can happen to anyone, including healthy people. Doctors share symptoms to look for and explain why people pass out. 6 signs you're about to pass out and why it happens
Apart from treating underlying reversible causes (e.g., stopping or reducing certain medications, treating autoimmune causes), several measures can improve the symptoms of orthostatic hypotension and prevent episodes of syncope (fainting). Even small increases in the blood pressure may be sufficient to maintain blood flow to the brain on standing.
According to the Cleveland Clinic, POTS is a chronic condition that causes an abnormally large increase in heart rate when standing or sitting up, which often leads to fainting episodes that ...
Causes: Hypotension, hypoglycaemia, arrhythmia, anaemia, hypokalaemia, thrombosis, water intoxication, dehydration: Risk factors: Poor dietary or diabetic management, genetic predisposition to cardiac arrhythmia: Diagnostic method: Based on symptoms. Some thrombotic pre-syncope may be indicated by a troponin serum level. Treatment: Dependent on ...
The single most important predictor is fainting or near-fainting during exercise, which should require detailed explanation and investigation. [2] The victims include many well-known names, especially in professional association football, and close relatives are often at risk for similar cardiac problems.
Episodes of vasovagal syncope are typically recurrent and usually occur when the predisposed person is exposed to a specific trigger. Before losing consciousness, the individual frequently experiences early signs or symptoms such as lightheadedness, nausea, the feeling of being extremely hot or cold (accompanied by sweating), ringing in the ears, an uncomfortable feeling in the heart, fuzzy ...
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