Objective
The myocardial bridge (MB) is an anomaly characterized by a typical intramyocardial route of a segment of one of the major coronary arteries. Pupillometry is a simple, non-invasive technique that provides valuable data concerning the balance of both branches of autonomous nervous system. The aim of the present study was to assess pupillary autonomic functions in patients with MB.
Methods
A total of 21 patients with MB were selected from our medical records between January 2012 to December 2013. Presence of MB detected by coronary computed tomography angiography in all patients. We compared the dynamic pupillometric data of these patients with 20 volunteers matched for age and sex. The images of both eyes are acquired and processed in real time with Metrovision MonPack one: 30 images per second (standard) or 200 images per second (with the fast camera option). The average response to successive visual stimuli (light flashes) is quantified with the following parameters: latency and duration of contraction and dilatation; initial, minimum, maximum, and mean pupil diameter; amplitude of contraction; contraction and dilatation velocity; and percent pupil contraction (PPC).
Methods
A total of 21 patients with MB were selected from our medical records between January 2012 to December 2013. Presence of MB detected by coronary computed tomography angiography in all patients. We compared the dynamic pupillometric data of these patients with 20 volunteers matched for age and sex. The images of both eyes are acquired and processed in real time with Metrovision MonPack one: 30 images per second (standard) or 200 images per second (with the fast camera option). The average response to successive visual stimuli (light flashes) is quantified with the following parameters: latency and duration of contraction and dilatation; initial, minimum, maximum, and mean pupil diameter; amplitude of contraction; contraction and dilatation velocity; and percent pupil contraction (PPC).
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