A Study Of Relationship Between Self-rating Anxiety Cale Score And Success Rate Of64-Slice Computed Omography Coronary Angiography

Objective: Computed Tomography Coronary Angiography (CTCA) isan important method to get coronary artery images. Because of itsnon-invasion it is more acceptable and widely used in screening for coronaryartery diseases (CHD).64-slice CT is the most common equipment used inclinic recently.64-slice CT has its own indications and counter-indications.But not every totally-fitting patients who are to take CTCA scan can completethis scan and gain CT images which meet diagnosis level. The direct factorsaffected are heart rate and rhythm control in those subjects. And heart rate andrhythm are adjusted by automatic nervous system which is highly related topatients`emotion. This study is trying to analysis the effects of tension andanxiety on CTCA through Self-Rating Anxiety Scale (SAS) investigationbefore and after CT scan.Methods:1)Subjects aged from18to85who were going to do CTCAbetween June/2011and Nov/2011were enrolled. One to two hours before CTscan basic data of gender, age, heart rate at rest, anti-arrhythmia medicinesusing, family history were recorded and SAS score was taken. The samegroup of image department doctors, technicians, nurses performed CTCA forall the enrolled subjects and observed success or not of CTCA scan for eachsubject. Not matter the success or not of CT scan SAS score was redone.2)SAS: SAS is used to depict feeling of anxious patients. SAS is an easy tool to assess subjective feeling and can precisely reflect subjective feeling ofboth psychotic and normal person. The major index of SAS is sum-score. Toadd score of each item is rough score, and integral number of rough-score by1.25is standard score. In china if person whose standard score is above50can be diagnosed anxiety. Standard score between50and59is mild anxious,between60to69is moderate anxious, more than70is severe anxious.3)Anxiety: Anxiety is a state of apprehension, uncertainty, and fearresulting from the anticipation of a realistic or fantasized threatening event orsituation, often impairing physical and psychological functioning such asnervous, cry, thirsty, chest distress, palpitation, sweating.Results:1)According to whether subjects completed CTCA scan andgained images could be diagnosed successfully or not we divided all thesubjects into two groups, which are successful group and non-successfulgroup. The SAS standard score of successful group is lower thannon-successful group(P=0.041).2)We divided all the subjects into five groups according to SAS standardscore frequency table and reference value of SAS standard score to diagnoseanxiety. As SAS standard score rising the success rate of CTCA scan willdecrease(P<0.001). And for further analysis we found subjects whose SASstandard score was less than36had a higher success rate than those no lessthan36(P=0.011).3)SAS standard score after CTCA scan is lower than that before scan insuccessful group (P<0.001). SAS standard score after CTCA scan is higherthan that before scan in non-successful group (P=0.022). 4)In all successfully completed CTCA subjects SAS standard score ofmyocardial bridge patients is higher(P=0.023).Conclusions:1)SAS standard score of most suspected patients of CHDis lower than50to diagnose anxiety. But the SAS standard score in successfulgroup is obviously lower than non-successful group. So even not in anxietypatients, the degree of intension affects64-slice CTCA.2)As SAS standard score rising the success rate of64-slice CTCA willdecrease. They two may have a linear relationship. We may take SAS toevaluate intension and anxiety degree as possible influencing factors in64-slice CTCA scan and SAS standard score36is a cut-off value to judgewhether people can complete CTCA scan.3)SAS standard score is different before and after64-slice CTCA scan.Compared to the SAS score before CT scan in successful group will decreaseand in non-successful group increase after CT scan. CTCA itself may be anindependent factor of causing nervous or anxious.4)In all successfully completed CTCA subjects SAS standard score ofmyocardial bridge patients is higher. Intension and anxiety may causemyocardial bridge patients easier to show. We should pay attention tomyocardial bridge in suspected CHD patients.