Comparison of cortisol levels in patients with vasovagal syncope and postural tachycardia syndrome.

Objectives: To compare the levels of cortisol in patients of vasovagal syncope (VVS) and postural tachycardia syndrome (POTS).

Methods: A cross-sectional analytical study was conducted at Islamic International Medical College, Rawalpindi and Electrophysiology Department at (AFIC). This study included 80 subjects, comprising of 35 patients in each group of vasovagal syncope and postural tachycardia syndrome and 10 healthy subjects.

Association of serotonin levels in patients of vasovagal syncope and postural tachycardia syndrome.

Objective: To determine the level of serotonin in patients of vasovagal syncope and postural tachycardia syndrome after head-up tilt test.

Methods: The cross-sectional analytical study was conducted at the Islamic International Medical College and the Department of Electrophysiology, Armed Forces Institute of Cardiology, Rawalpindi, from April 2017 to March 2018. Group A comprised cases of vasovagal syncope, group B had patients of postural tachycardia syndrome, and group C had healthy controls.