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Fast heart rate
Dizziness    
Fainting    

10 possible causes of "Fast heart rate, Dizziness, F..."
Symptoms:
  • Dementia
  • Coma
  • Fast heart rate
  • Dizziness
  • Fainting
  • Malaise
1. Low Blood Sugar (Hypoglycemia)
Also known as hypoglycemia, low blood sugar can be a dangerous condition. People often complain about low blood sugar. However, serious hypoglycemia is rare in adults and children over the age of 10 who are no...
This condition is considered a medical emergency. Urgent care may be required.
Symptoms:
  • Shortness of breath
  • Chest pain
  • Fast heart rate
  • Dizziness
  • Fainting
  • Palpitations
2. Abnormal Heart Rhythms
Have you ever felt your heart skip a beat? If you're not a character in a romance novel, that may mean you have an abnormal heart rhythm (arrhythmia). Within the heart is a complex system of valves, nodes, an...
This condition is considered a medical emergency. Urgent care may be required.
Symptoms:
  • Sleep paralysis
  • Abnormal heart rhythms
  • Fast heart rate
  • Dizziness
  • Fainting
  • Choking
3. Panic Disorder
Panic disorder occurs when you live in fear of having a panic attack. You are having a panic attack when you feel sudden, overwhelming terror that has no obvious cause. You may experience physical symptoms such as ...
Symptoms:
  • Leg pain
  • Peripheral cyanosis
  • Fast heart rate
  • Dizziness
  • Fainting
  • Rapid shallow breathing
4. Pulmonary Embolism
A pulmonary embolism is a blood clot that affects the lungs. Typically, a blood clot travels from another area in the body before becoming lodged in one of the arteries that supply blood to the lungs. A pulmonar...
This condition is considered a medical emergency. Urgent care may be required.
Symptoms:
  • Loss of appetite
  • Abnormal heart rhythms
  • Fast heart rate
  • Dizziness
  • Fainting
  • Heart rate altered
5. Drug Allergy Overview
Drug allergies are overblown responses of the immune system to prescription or over-the-counter drugs that aren't typically harmful. Learn more about symptoms, causes and treatments for allergic reactions to drugs.
This condition is considered a medical emergency. Urgent care may be required.
Symptoms:
  • Confusion
  • Pain
  • Fast heart rate
  • Dizziness
  • Fainting
  • Tired
6. Atrial Fibrillation and Flutter
Atrial fibrillation and atrial flutter are irregular heart rhythms that occur when the upper chambers of your heart (the atria) beat too fast.Atrial fibrillation can be sustained or can occur in bursts. It creates a...
Symptoms:
  • Lightheadedness
  • Fatigue
  • Fast heart rate
  • Dizziness
  • Fainting
  • Palpitations
7. Paroxysmal Supraventricular Tachycardia (PSVT)
Paroxysmal supraventricular tachycardia (PSVT) is a faster-than-normal heart rate. The term paroxysmal means that it only happens from time to time. In the case of PSVT, the rapid heart rate can last from a few minute...
This condition is considered a medical emergency. Urgent care may be required.
Symptoms:
  • Pain
  • Nausea
  • Fast heart rate
  • Dizziness
  • Fainting
  • Impaired judgement
8. Carbon Monoxide Poisoning
Carbon monoxide (CO) is a gas that is both odorless and colorless. It emanates from anything that produces combustion fumes. Common devices that produce these fumes include: heaters fireplaces car mufflers space heater...
This condition is considered a medical emergency. Urgent care may be required.
Symptoms:
  • Incomplete emptying of bladder
  • Constipation
  • Fast heart rate
  • Dizziness
  • Fainting
  • Urinary incontinence
9. Autonomic Neuropathy
Autonomic neuropathy (AN) is a condition that results from damage to nerves that assist in organ and organ system functioning. This nerve damage disturbs signal processing between the autonomic nervous system and th...
Symptoms:
  • Dizziness
  • Lightheadedness
  • Fast heart rate
  • Fainting
  • Fluttering heart
  • Abnormal heart rhythms
10. Wolff-Parkinson-White Syndrome
Wolff-Parkinson-White syndrome is a birth defect in which the heart develops an extra electrical pathway, which can lead to a rapid heart rate (tachycardia). Medications may help alleviate the symptoms. However, ...

This feature is for informational purposes only and should not be used to diagnose.
Please consult a healthcare professional if you have health concerns.
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