Risks

A nuclear stress test is generally safe. Complications are rare. As with any medical procedure, there is a risk of complications, which may include:

• Abnormal heart rhythms (arrhythmias). Arrhythmias that occur during a stress test usually go away shortly after you stop exercising or the medication wears off. Life-threatening arrhythmias are rare.
• Heart attack. Although extremely rare, it's possible that a nuclear stress test could cause a heart attack.
• Low blood pressure. Blood pressure may drop during or immediately after exercise, possibly causing you to feel dizzy or faint. The problem should go away after you stop exercising.
• Dizziness or chest pain. These symptoms can occur during a nuclear stress test. Some people also have nausea, shakiness, headache, flushing, shortness of breath and anxiety during the stress test. These signs and symptoms are usually mild and brief, but tell your doctor if they occur.