The Effect of Oral Calcium Channel Blockers on the Ocular Blood Flow.
- Author:
Hyung Jin KOO
1
;
Changwon KEE
Author Information
1. Department of Ophthalmology, Samsung Medical Center, College of Medicine, Sung Kyun Kwan University.
- Publication Type:Original Article
- Keywords:
Pulsatile ocular blood flow;
Calcium-channel blocker
- MeSH:
Blood Pressure;
Calcium Channel Blockers*;
Calcium Channels*;
Calcium*;
Healthy Volunteers;
Heart Rate;
Intraocular Pressure;
Low Tension Glaucoma;
Nifedipine;
Verapamil
- From:Journal of the Korean Ophthalmological Society
1998;39(7):1516-1522
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
Pulsatile ocular blood flow(POBF) System can measure the ocular blood flow easily and reliably. We attempted to investigate if oral calcium-channel blockers such as nifedipine and verapamil used for treatment of normal tension glaucoma increase the ocular blood flow in normal eyes by using above instrument. Twelve normal volunteers who have no ocular and systemic disorder history were involved in this study, and their ocular blood flow, intraocular pressure, systolic and diastolic blood pressure and pulse rate were measured. We performed the same study for 14 normal volunteers using verapamil. Systolic and diastolic blood pressures were decreased significantly after administration of calcium-channel blockers(P<0.05), but ocular blood flow did not change with administration of calcium-channel blockers(P>0.05). The intraocular pressure did not vary after administration of verapamil, but elevated in mean by 1.1mmHg after administration of nifedipine(P<0.05). Our study showed oral calcium-channel blockers, nifedipine and verapamil, did not increase the ocular blood flow in normal subjects with use of POBF.
