Diagnosing vasovagal syncope often involves ruling out other possible causes of your fainting — particularly heart-related problems. These tests may include:
- Electrocardiogram. This test records the electrical signals your heart produces. It can detect irregular heart rhythms and other cardiac problems. You may need to wear a portable monitor for at least a day or as long as a month.
- Echocardiogram. This test uses ultrasound imaging to view the heart and look for conditions, such as valve problems, that can cause fainting.
- Exercise stress test. This test studies heart rhythms during exercise. It's usually conducted while you walk or jog on a treadmill.
- Blood tests. Your doctor may look for conditions, such as anemia, that can cause or contribute to fainting spells.
Tilt table test
If no heart problems appear to cause your fainting, your doctor may suggest you undergo a tilt table test. For a tilt table test:
- You lie flat on your back on a table.
- The table changes position, tilting you upward at various angles.
- A technician monitors your heart rhythms and blood pressure to see if the postural changes affect them.
Aug. 04, 2017
- Syncope. Merck Manual Professional Version. http://www.merckmanuals.com/professional/cardiovascular_disorders/symptoms_of_cardiovascular_disorders/syncope.html#v1145025. Accessed Dec. 14, 2015.
- Stone CK, et al., eds. Immediate management of life-threatening problems causing syncope. In: Current Diagnosis & Treatment: Emergency Medicine. 7th ed. New York, N.Y.: The McGraw-Hill Companies; 2011. http://www.accessmedicine.com. Accessed Dec. 14, 2015.
- Jardine DL. Vasovagal syncope: New physiologic insights. Cardiology Clinics. 2013;31:75.
- Aminoff MJ, et al. Seizures & syncope. In: Clinical Neurology. 8th ed. New York, N.Y.: The McGraw-Hill Companies; 2012. http://www.accessmedicine.com. Accessed Dec. 14, 2015.
- Angaran P, et al. Syncope. Neurology Clinics. 2011;29:903.
- Olshansky B. Upright tilt table testing in the evaluation of syncope. http://www.uptodate.com/home. Accessed Dec. 15, 2015.