Laughter-induced syncope

Laughter-induced syncope is an unusual but recognized form of situational syncope (fainting) likely to have a similar pathophysiological origin to tussive syncope. One reported case occurred while a patient was watching the television show Seinfeld, and was given the name Seinfeld syncope.[1]

There are few case reports of this syndrome in the literature. Patients, as in this case, might present initially to the emergency department, and laughter should be considered among the numerous differentials for syncope.

Laughter-induced syncope should not be confused with cataplexy, a sudden loss of muscle tone triggered by strong emotions, particularly laughter. Unlike syncope, there is no loss of consciousness in cataplexy, which affects 65-75% of patients with narcolepsy.[2]

To date there have been few cases of laughter-induced syncope documented in medical literature.[3]

References

  1. ^ Cox SV, Eisenhauer AC, Hreib K (October 1997). "Seinfeld syncope". Catheterization and Cardiovascular Diagnosis. 42 (2): 242. doi:10.1002/(SICI)1097-0304(199710)42:2<242::AID-CCD41>3.0.CO;2-M. PMID 9328725.
  2. ^ Khan, Z; Trotti, LM (July 2015). "Central Disorders of Hypersomnolence: Focus on the Narcolepsies and Idiopathic Hypersomnia". Chest. 148 (1): 262–273. doi:10.1378/chest.14-1304. PMC 4694150. PMID 26149554.
  3. ^ Bloomfield and Jazrawi; Jazrawi, S (2005). "Shear Hilarity Leading to Laugh Syncope in a Healthy Man". Journal of the American Medical Association. 293 (23): 2863–2864. doi:10.1001/jama.293.23.2863-b. PMID 15956630.

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