Loading...
Please wait, while we are loading the content...
Similar Documents
Heart Rate and Blood Pressure Dynamics during Head-up Tilt Test 116
| Content Provider | Semantic Scholar |
|---|---|
| Author | Cotet, Ioana Georgiana Moga, Victor-Dan Ciocârlie, Tudor Parge, F. Moga, Mariana Jahraus, Sabine Avram, Rodica |
| Copyright Year | 2014 |
| Abstract | Correspondence to: Victor Moga, MD, PhD Clinic of Cardiology, Timiooara County Hospital, 10 Iosif Bulbuca St., 300736 SUMMARY: The orthostatic stress causes many hemodynamic changes in cardiovascular system. The human body has a remarkable ability to maintain a stable blood pressure in the presence of ever changing forces that constantly shift and redistribute the circulating blood volume. Similar head-up tilt testing (HUTT) stimulates sympathetic nervous system, which leads to increase of total peripheral resistance and acceleration of the heart rate. The exact mechanisms responsible for loss of consciousness associated with profound hypotension and/or bradycardia, and mediated by vagal excess and sympathetic withdrawal, remain uncertain. The aim of our study was to perform the head-up tilt test at different tilt angles in healthy subjects, to assess the role of the autonomic tone mechanisms during postural changes and the dynamic changes of heart rate and blood pressure that are observed also in the pathogenesis of neurally mediated syncope. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://jmed.ro/articole/475.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
