In this study we analyzed retrospectively the results of head-up tilt-table test (HUTT) and clinical features of 591 subjects. The head-up tilt-table test results [normal, vasovagal syncope (mixed, vasodepressor and cardioinhibitory type 2A and 2B)] and the asystole periods were compared by age groups (<25, 25- 50, >50 years old) and gender. Mixed type and vasodepressor type vasovagal syncope were the predominant types of response [140 (23.7%) and 76 (12.9%), respectively]. Mixed type vasovagal syncope was higher in younger ages (<25 years) whereas vasodepressor and cardioinhibitory type 2A and 2B type vasovagal syncope was slightly higher in older ages (>50 years) (p=0.652). While the mostly observed asystole period was 3-6 sec and over in younger ages, it may prolong 7-8 sec and over in adults (25-50 years old) (p=0.285). The only difference with regard to gender was that the rate of vasodepressor type was slightly higher in females (P=0.153) whereas asystole period was more frequently observed in males (P=0.709). Head-up tilt-table test is a convenient and easily applicable test in proper circumstances for all age groups. Although mixed type vasovagal syncope is a predominant diagnosis in the test, cardioinhibitory type vasovagal syncope is not an infrequent one in all age groups. While asystole period of 3-6 sec was mainly observed in younger patients, it was prolonging over 7-8 sec in older ages without any complication.
Keywords: Head-up tilt-table test; vasovagal syncope; asystole; arrhythmia
