PMID- 16500443
OWN - NLM
STAT- MEDLINE
DCOM- 20060411
LR  - 20220318
IS  - 0194-5998 (Print)
IS  - 0194-5998 (Linking)
VI  - 134
IP  - 3
DP  - 2006 Mar
TI  - What is the true incidence of horizontal semicircular canal benign paroxysmal 
      positional vertigo?
PG  - 451-4
AB  - OBJECTIVE: To assess the correct incidence of horizontal semicircular canal 
      (H-SCC) benign paroxysmal positional vertigo (BPPV). STUDY DESIGN: Retrospective 
      assessment of patients with BPPV. METHODS: All patients with BPPV were included 
      and the rates of involvement of posterior, horizontal, and anterior SCCs were 
      determined. RESULTS: One hundred sixty-nine patients with the diagnosis of BPPV 
      were evaluated. One hundred forty-four patients (85.2%) were found to have 
      posterior SCC (P-SCC) involvement, and there were 20 patients (11.8%) with 
      horizontal SCC (H-SCC) and 2 patients (1.2%) with anterior SCC (A-SCC) 
      involvement. Three patients (1.8%) had simultaneous H-SCC and P-SCC BPPV 
      ipsilaterally. Geotropic nystagmus was seen in 17 out of 23 patients (73.9%) in 
      roll test, and ageotropic nystagmus was seen in the remaining 6 patients (26.1%). 
      CONCLUSION: H-SCC constitutes 13.6% of all BPPV cases. H-SCC BPPV with geotropic 
      nystagmus is more common. H-SCC BPPV can coexist with ipsilateral P-SCC BPPV. 
      However, in some cases of H-SCC BPPV, Dix-Hallpike maneuver can cause vertigo and 
      horizontal nystagmus. This may be confused with P-SCC BPPV. Therefore, the roll 
      test must be performed in all cases in addition to Dix-Hallpike maneuver and both 
      ears must be evaluated with respect to all SCCs for BPPV. EBM RATING: C-4.
FAU - Cakir, Burak Omur
AU  - Cakir BO
AD  - Sisli Etfal Education and Research Hospital, I. Department of 
      Otorhinolaryngology-Head and Neck Surgery, Kagithane, Istanbul, Turkey. 
      burak_cakir@hotmail.com
FAU - Ercan, Ibrahim
AU  - Ercan I
FAU - Cakir, Zeynep Alkan
AU  - Cakir ZA
FAU - Civelek, Senol
AU  - Civelek S
FAU - Sayin, Ibrahim
AU  - Sayin I
FAU - Turgut, Suat
AU  - Turgut S
LA  - eng
PT  - Journal Article
PL  - England
TA  - Otolaryngol Head Neck Surg
JT  - Otolaryngology--head and neck surgery : official journal of American Academy of 
      Otolaryngology-Head and Neck Surgery
JID - 8508176
SB  - IM
MH  - Adult
MH  - Aged
MH  - Aged, 80 and over
MH  - Audiometry, Pure-Tone
MH  - Caloric Tests
MH  - Electronystagmography
MH  - Eye Movements/physiology
MH  - Female
MH  - Follow-Up Studies
MH  - Humans
MH  - Magnetic Resonance Imaging
MH  - Male
MH  - Middle Aged
MH  - Nystagmus, Physiologic/physiology
MH  - Posture
MH  - Retrospective Studies
MH  - Rotation
MH  - Semicircular Canals/*physiopathology
MH  - Time Factors
MH  - Vertigo/*classification/physiopathology
EDAT- 2006/02/28 09:00
MHDA- 2006/04/12 09:00
CRDT- 2006/02/28 09:00
PHST- 2005/06/02 00:00 [received]
PHST- 2005/10/17 00:00 [revised]
PHST- 2005/07/24 00:00 [accepted]
PHST- 2006/02/28 09:00 [pubmed]
PHST- 2006/04/12 09:00 [medline]
PHST- 2006/02/28 09:00 [entrez]
AID - S0194-5998(05)02073-5 [pii]
AID - 10.1016/j.otohns.2005.07.045 [doi]
PST - ppublish
SO  - Otolaryngol Head Neck Surg. 2006 Mar;134(3):451-4. doi: 
      10.1016/j.otohns.2005.07.045.