Previous investigations have allowed for stratification of patients with postural tachycardia syndrome (POTS) on the basis of peripheral blood flow. One such subset, comprising "normal-flow POTS" patients, is characterized by normal peripheral resistance and blood volume in the supine position but thoracic hypovolemia and splanchnic blood pooling in the upright position. We studied 32 consecuti...

OBJECTIVE We investigated the prevalence of suicidal ideation in relationship with symptoms of sleep disruption in people with postural orthostatic tachycardia syndrome (POTS). METHODS Online surveys (including the Pittsburgh Sleep Quality Index and the Suicide Behaviors Questionnaire - Revised) were completed by 705 POTS patients and 170 non-POTS controls. RESULTS Poor sleep quality was re...

Postural Tachycardia Syndrome (POTS) Print ISSN: 0009-7322. Online ISSN: 1524-4539 Copyright © 2013 American Heart Association, Inc. All rights reserved. is published by the American Heart Association, 7272 Greenville Avenue, Dallas, TX 75231 Circulation doi: 10.1161/CIRCULATIONAHA.112.144501 2013;127:2336-2342 Circulation. http://circ.ahajournals.org/content/127/23/2336 World Wide Web at: The ...

To determine the effects of drought stress, especially light on flower number in passion fruit, one-year-old fruit plants grown 7.5 L plastic pots were subjected to different soil water content treatments, namely wetness, drought, and heavy for two months. Average, maximum, minimum contents (v/v) 44, 47, 41% wetness treatment, 23, 40, 11% treatment 11, 33, 6% treatment. Flower decreased as stre...

POTS is a global public-health disease, but predictor for therapeutic response to metoprolol in children with POTS is lacking. This study was designed to investigate predictive value of plasma C-type natriuretic peptide (CNP) in the therapeutic efficacy of metoprolol on postural tachycardia syndrome (POTS) in children. Totally 34 children with POTS and 27 healthy children were included in the s...

Previous investigations have demonstrated a subset of postural tachycardia syndrome (POTS) patients characterized by normal peripheral resistance and blood volume while supine but thoracic hypovolemia and splanchnic blood pooling while upright secondary to splanchnic hyperemia. Such "normal-flow" POTS patients often demonstrate hypocapnia during orthostatic stress. We studied 20 POTS patients (...

Standing translocates thoracic blood volume into the dependent body. The skeletal muscle pump participates in preventing orthostatic intolerance by enhancing venous return. We investigated the hypothesis that skeletal muscle pump function is impaired in postural tachycardia (POTS) associated with low calf blood flow (low-flow POTS) and depends in general on muscle blood flow. We compared 12 sub...

22 The postural tachycardia syndrome (POTS), a chronic form of orthostatic intolerance, has 23 signs and symptoms of lightheadedness, loss of vision, headache, fatigue, and neurocognitive 24 deficits consistent with reductions in cerebrovascular perfusion. We hypothesized that young, 25 normocapnic POTS patients exhibit abnormal cerebral autoregulation (CA) that results in 26 decreased static a...