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What causes chest tightness, fatigue and lightheadedness? 4 possible conditions

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

1

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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2

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 »

3

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.

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4

Ischemic Cardiomyopathy

Ischemic cardiomyopathy (IC) is a condition that occurs when the heart muscle is weakened. It's usually caused by heart attack or coronary artery disease.

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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