Effect of an oral anxiolytic medication and heart rate variability on image quality of 64-slice MDCT coronary angiography.

PURPOSE: The aim of the study was to investigate the relationship between image quality in 64-slice multidetector computed tomography (MDCT) and patients' preimaging anxiety status and heart rate variability (HRV), and to evaluate the efficacy of an orally administered anxiolytic medication on HRV and image quality. MATERIALS AND METHODS: Sixty patients [14 women, 46 men; mean age 52.53 ± 10.55 (SD), range 33-78 years] were studied. Anxiety levels were assessed with the State-Trait Anxiety Inventory 60 min before the procedure. The participating patients were randomly assigned to one of the two study groups: a control group (no medication administered for anxiety reduction) and an anxiolytic medication group, with 30 patients in each group. The presence of motion artefacts and image quality for each coronary artery segment were evaluated using a four-point grading system. To estimate HRV, the duration of each heartbeat during MDCT data acquisition was measured in each patient. RESULTS: A moderate correlation was found between HRV during MDCT scanning and the mean image quality for all coronary segments (r=0.47, p<0.01). There was an association between HRV and state anxiety scores in all cases (r=0.370, p<0.01). HRV in the patients who received alprazolam was statistically significantly lower than in controls (p<0.05). The average image quality in patients who used alprazolam was also statistically significantly higher than in controls (p<0.05). CONCLUSIONS: The most important finding in our study is that oral premedication to reduce anxiety is also effective in decreasing HRV and improves image quality. Therefore, we suggest that using alprazolam in addition to a ß-blocker may improve image quality in patients undergoing MDCT coronary angiography (MDCT-CA). Anxiolytic usage may improve image quality by lowering the HRV in selected cases where administration of a ß-blocker is contraindicated. We also suggest that further studies in larger series are required to validate this finding.

Clinical features and co-morbidity of social phobics in Turkey.

The aim of this study is to investigate the clinical features and frequency and importance of related co-morbid disorders of social phobia in a clinical sample. Eighty-seven patients meeting DSM-III-R diagnostic criteria for social phobia were studied. All patients were assessed by using a semi-structured socio-demographic form, the Structured Clinical Interview for DSM-III-R, Manual for the Structured Clinical Interview for DSM-III-R Personality Disorders, Liebowitz Social Anxiety Scale, Hamilton Rating Scale for Depression and Hamilton Rating Scale for Anxiety. Sixty-eight (78.2%) of the group were male, 19 (21.8%) were female. The ages varied between 16-58 years, with a mean of 26.2 years (SD = 8.5). Fifty-one point seven percent of the subjects were assessed as having a co-morbid axis I disorder, of which 12.6% consisted of panic disorder and 10.3% agoraphobia. An additional axis II disorder had been found in 67.8% of the subjects, and 54.0% of them had been diagnosed as having avoidant personality disorder. The frequency of co-morbid disorders in our social phobic sample is lower than most of the studies in the literature. The interface between social phobia and avoidant personality disorder needs to be studied and discussed further.