This site became the new on June 19th. Learn more.
Show more Menu IMPORTANT: Listing of a study on this site does not reflect endorsement by the National Institutes of Health. Talk with a trusted healthcare professional before volunteering for a study. Read more... Menu IMPORTANT: Talk with a trusted healthcare professional before volunteering for a study. Read more... Menu
Give us feedback

Autonomic Nervous System Activity and Oculocardiac Reflex.

This study is currently recruiting participants.
See Contacts and Locations
Verified March 2017 by Magdalena Wujtewicz, Medical University of Gdansk
Information provided by (Responsible Party):
Magdalena Wujtewicz, Medical University of Gdansk Identifier:
First received: October 23, 2012
Last updated: March 21, 2017
Last verified: March 2017
Pulling the eyeball during ophthalmic surgery provokes decrease in heart rate. This phenomenon is called oculocardiac reflex. In some patients asystole may occur. Other cardiac features of this reflex include hypotension, dysrhythmias, atrioventricular block. These cardiovascular disturbances may lead to decreased perfusion and ischemia of vital organs. Patients with existing cardiovascular disease are in risk of complications. Cardiovascular system is mainly innervated with autonomic nervous system (ANS). Sympathetic/parasympathetic activity may be determined by Heart Rate Variability (HRV). HRV analysis based on short 5 minutes electrocardiography has been found useful for prediction of hypotension and bradycardia during induction of general anaesthesia and during spinal block. The aim of this study is to verify whether it is possible to predict oculocardiac reflex with the use of HRV analysis for ANS activity assessment, measured prior to the ophthalmic surgery.

Bradycardia During Pulling of Eyeball

Study Type: Observational
Study Design: Observational Model: Cohort
Time Perspective: Prospective
Official Title: Prediction of Oculocardiac Reflex in Relationship to Autonomic Nervous System Activity, Mesured With the Use of ECG HRV Analysis.

Further study details as provided by Magdalena Wujtewicz, Medical University of Gdansk:

Primary Outcome Measures:
  • oculocardiac reflex occurence in relation to autonomic system activity [ Time Frame: perioperatively - about 2 hours ]

Estimated Enrollment: 60
Study Start Date: April 2009
Estimated Study Completion Date: December 2018
Estimated Primary Completion Date: December 2018 (Final data collection date for primary outcome measure)

Ages Eligible for Study:   18 Years to 65 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Probability Sample
Study Population
patients operated bacause of retinal pathology

Inclusion Criteria:

  • planned surgery
  • over 18 years of age
  • surgery under general anaesthesia

Exclusion Criteria:

  • urgent surgery
  • under 18 years of age and over 65
  • patients with generalised, nontreated disease
  • patients receiving beta blockers or calcium channel blocker
  • diabetic patients
  • patients operated under peri or retrobulbar anaesthesia
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01714362

Contact: Magdalena A Wujtewicz, MDPhD +48583493357

Medical University of Gdansk Recruiting
Gdansk, Poland, 80-211
Contact: Magdalena A. Wujtewicz, MD., PhD    48583493281   
Sponsors and Collaborators
Medical University of Gdansk
Principal Investigator: Magdalena A Wujtewicz, MD PhD Department of Ophthalmology, Mediacal University of Gdansk, Gdansk, Poland
  More Information

Responsible Party: Magdalena Wujtewicz, assistant professor, Medical University of Gdansk Identifier: NCT01714362     History of Changes
Other Study ID Numbers: GUMed-Ow-003
Study First Received: October 23, 2012
Last Updated: March 21, 2017

Keywords provided by Magdalena Wujtewicz, Medical University of Gdansk:
oculocardiac effect

Additional relevant MeSH terms:
Arrhythmias, Cardiac
Heart Diseases
Cardiovascular Diseases
Pathologic Processes processed this record on September 21, 2017