purpose: to study the validity and reliability of subjective refraction, predicted phoropter refraction (ppr) measured by zywave aberrometer, and final surgical plan applied for laser vision correction. methods: this prospective study was conducted on 94 myopic or myopic astigmatic eyes (48 patients) who were candidates for refractive surgery in negah eye hospital from april 2012 to july 2012. ...

atrial fibrillation is the most prevalent permanent arrhythmia. it may be associated with other cardiac pathologies which need surgical treatment. various types of surgery including the traditional cut-sew operations and operations using different energy sources are currently in use. in comparison with medical treatment, surgery is safe, effective, and has reliable results.

objective: the current study aimed to determine the efficacy of radioiodine-131 (131i) ablation therapy with thyroid hormone replacement one day before 131i administration in patients with well-differentiated thyroid cancer (dtc). methods: this retrospective study included 29 patients who underwent 131i therapies twice for dtc during 6-12 months.  since all the patients obviously had residual l...

patients with valvular heart disease and suffering atrial fibrillation of more than 12 months duration have a low probability of remaining in sinus rhythm after valve surgery alone. we performed intra-operative radiofrequency ablation or cryoablation as an alternative to surgical maze ііі procedure to create linear lesion lines for conversion of this arrhythmia to sinus rhythm. a total of 30 pa...

BACKGROUND The angle kappa is important in proper centration of corneal ablation in keratorefractive surgery. Orbscan II device is widely used preoperatively in photoablation surgeries and can be used to measure the angle kappa. OBJECTIVES This study aimed to determine the mean angle kappa and its intercepts in healthy young Iranian adults. PATIENTS AND METHODS In this cross-sectional study...

background: complete atrioventricular block (av block) is a serious complication of slow pathway ablation therapy in the treatment of atrioventricular nodal re-entrant tachycardia (avnrt).   the present study was aimed at determining whether the electroanatomical pace mapping of koch’s triangle could significantly improve the safety, efficiency, and efficacy of selective slow pathway ablation i...

Understanding the role of peripheral defocus on central refractive development is critical because refractive errors can vary significantly with eccentricity and peripheral refractions have been implicated in the genesis of central refractive errors in humans. Two rearing strategies were used to determine whether peripheral hyperopia alters central refractive development in rhesus monkeys. In i...