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What causes dizziness and heart rate altered? 21 possible conditions

See a list of possible causes in order from the most common to the least.

1

Low Blood Sugar (Hypoglycemia)

This condition is considered a medical emergency. Urgent care may be required.

Hypoglycemia, or low blood sugar, is a potentially dangerous condition that's most common in people with diabetes. Learn what causes it and how to prevent it.

Read more »

2

High Blood Pressure Overview

Hypertension, or high blood pressure, occurs when your blood pressure increases to unhealthy levels. Learn how to reduce your risk, note symptoms, and more.

Read more »

3

Stroke Overview

This condition is considered a medical emergency. Urgent care may be required.

A stroke is a medical emergency that requires immediate medical care. Learn about the signs of a stroke and what to do.

Read more »

4

Heart Attack Overview

This condition is considered a medical emergency. Urgent care may be required.

A clot blocks the blood flow to the heart (heart attack), and damages heart muscle. Symptoms include chest pain, shortness of breath, and a blue or grey tinge to the skin.

Read more »

5

Dehydration

This condition is considered a medical emergency. Urgent care may be required.

Dehydration takes place when your body loses more fluid than you drink. The most common cause of water loss from the body is excessive sweating.

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6

Panic Disorder

Panic disorder occurs when you live in fear of a panic attack. You may be having a panic attack when you feel sudden, overwhelming terror with no obvious cause.

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7

Hypovolemic Shock

This condition is considered a medical emergency. Urgent care may be required.

Hypovolemic shock (hemorrhagic shock) is a life-threatening condition that results when you lose more than 20 percent of your body's blood or fluid supply, preventing the heart from pumping sufficient blood to your body.

Read more »

8

Beriberi

Beriberi is a term used for vitamin B1, or thiamine, deficiency. Vitamin B1 is found in foods like milk, beans, vegetables, meat, and whole grains.

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9

Paroxysmal Supraventricular Tachycardia (PSVT)

This condition is considered a medical emergency. Urgent care may be required.

People with paroxysmal supraventricular tachycardia experience a faster-than-normal heart rate. Learn more about the symptoms, treatments, and outlook.

Read more »

10

Caffeine Overdose

The recommended amount of caffeine is usually 400 mg per day for healthy adults. Caffeine overdose may occur if you ingest more than this amount.

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11

Pulmonary Embolism

This condition is considered a medical emergency. Urgent care may be required.

A pulmonary embolism is a blood clot that occurs in the lungs. It can damage part of the lung and other organs and decrease oxygen levels in the blood.

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12

Abdominal Aortic Aneurysm

This condition is considered a medical emergency. Urgent care may be required.

The aorta carries blood from your heart to your abdomen, legs, and pelvis. When the abdominal aortic walls are swollen, it's known as abdominal aortic aneurysm.

Read more »

13

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...

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14

Toxic Megacolon

This condition is considered a medical emergency. Urgent care may be required.

Toxic megacolon is a rare, life-threatening widening of the large intestine and is usually a complication of inflammatory bowel disease (IBD).

Read more »

15

Anorexia Nervosa

Anorexia nervosa is an eating disorder that can result in severe weight loss. Learn more about warning signs and treatment.

Read more »

16

Carbon Monoxide Poisoning

This condition is considered a medical emergency. Urgent care may be required.

Learn about carbon monoxide poisoning and what causes it. Find information on carbon monoxide symptoms, diagnosis, treatment, and prevention.

Read more »

17

Marine Animal Bites or Stings

This condition is considered a medical emergency. Urgent care may be required.

Many marine animals bite or sting. Some animals are venomous, while others can inflict deep bites. Learn more about the risks and prevention.

Read more »

18

Snake Bites

This condition is considered a medical emergency. Urgent care may be required.

A bite from a venomous snake should always be treated as a medical emergency. Even a bite from a harmless snake can lead to an allergic reaction or infection.

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19

Drug Allergy Overview

This condition is considered a medical emergency. Urgent care may be required.

A drug allergy is an allergic reaction to a medication. Find out how to know if you have one and what to do about it.

Read more »

20

Acute Mountain Sickness

Acute mountain sickness is a condition that occurs when your body can't adjust to a high level of altitude. Learn more about the signs and how to treat it.

Read more »

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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