Related Experiment Video
Updated: Oct 4, 2026

Neuro-rehabilitation Approach for Sudden Sensorineural Hearing Loss
Published on: January 25, 2016
Systemic hypotension and the development of acute sensorineural hearing loss in young healthy subjects
A Pirodda1, G G Ferri, G C Modugno
1Ear, Nose and Throat Section, Department of Surgical and Anaesthesiological Sciences, S. Orsola Hospital, University of Bologna, Bologna, Italy. corlboml@bo.nettuno.it
Background:
Sudden sensorineural hearing loss (SSHL) is an acute disorder whose origin is often unclear. A vascular disorder may be a causative factor.
Objective:
To determine whether hypotension influences the genesis of SSHL in healthy subjects.
Design:
To investigate the role of a 24-hour blood pressure (BP) profile in a population of young subjects with SSHL from January 1, 1996, to December 31, 1999, by a nonrandomized controlled trial.
Setting:
The Ear, Nose and Throat Section of the Department of Surgical and Anaesthesiological Sciences and the Department of Internal Medicine, S. Orsola Hospital, University of Bologna, Bologna, Italy.
Patients:
The study population consisted of 23 untreated healthy patients diagnosed as having SSHL compared with 20 age- and sex-matched normotensive control subjects. Both groups underwent 24-hour BP monitoring, and their BP profiles were analyzed and compared with routine BP values. The data were analyzed with the Statistical Package for the Social Sciences, version 7.1, and the results are expressed as mean +/- SD.
Main Outcome Measures:
The mean BP values were expected to be lower in the study population.
Results:
The average clinic and ambulatory BP values were significantly lower in patients with SSHL, for systolic (clinic, P =.004; ambulatory BP, P =.02) and diastolic (clinic, P =.03; ambulatory BP, P =.03) values. The occurrence of persistent hypotension (the presence of >2 consecutive recordings of systolic BP of < or =105 mm Hg and/or diastolic BP of < or =60 mm Hg) was increased in the population with SSHL.
Conclusion:
Systemic hypotension must be considered as the possible cause responsible for the development of SSHL in young healthy subjects.
Related Concept Videos
Alterations in Blood Pressure
Hypertension (High blood pressure)
Hypertension occurs when blood pressure readings consistently exceed the normal range. It is diagnosed when systolic blood pressure (the top number, indicating pressure while the heart beats)...
Hearing During Infancy and Toddlerhood
Special considerations while measuring blood pressure
Monitoring Both Arms:
Monitoring BP in both arms during the initial assessment is advisable, as the systolic value may differ by five to ten mm Hg between arms. For subsequent BP assessments, use the arm with the higher reading.
Hypertension III: Clinical Manifestations and Diagnostic Studies
Unrenewable Cells
Photoreceptors
The retina is composed of several layers and contains specialized cells called photoreceptors. The photoreceptors (rods and cones) change their membrane potential when stimulated by light energy. There are two types of photoreceptors—rods and cones—which differ in the shape of their outer...
