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Opt. Express"],"published-print":{"date-parts":[[2024,2,1]]},"abstract":"<jats:p>Sympathetic vasomotor response is the most important part of the autonomic regulation of circulation, which determines the quality of life. It is disrupted in a number of diseases, particularly in patients with congestive heart failure (CHF). However, experimental evaluation of reflex vasoconstriction is still a non-trivial task due to the limited set of available technologies. The aim of this study is to assess the dynamics of vasomotor response of forearm vessels due to both the deactivation of cardiopulmonary baroreceptors and cold stress using a newly designed imaging plethysmograph (IPG) and compare its performance with classical air plethysmograph (APG). In both vasoconstriction tests, vasomotor response was assessed as a change in the blood flow rate due to venous occlusion compared to that at rest. Both tests were carried out in 45 CHF patients both before and after heart transplantation, as well as in 11 age-matched healthy volunteers. Prior to transplantation, both APG and IPG showed a significant decrease in vasomotor response in CHF patients due to both tests as compared to the control group. After heart transplantation, an increase in vasomotor reactivity was revealed in both vasoconstriction tests. We have found that both plethysmographic techniques provide correlated assessment of changes in the vasomotor response. In addition, we have found that IPG is more resistant to artifacts than APG. The new IPG method has the advantage of measuring blood flow in a contactless manner, making it very promising for experimental evaluation of vasomotor response in clinical conditions.<\/jats:p>","DOI":"10.1364\/boe.511925","type":"journal-article","created":{"date-parts":[[2024,1,2]],"date-time":"2024-01-02T18:00:14Z","timestamp":1704218414000},"page":"687","update-policy":"https:\/\/doi.org\/10.1364\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Plethysmographic assessment of vasomotor response in patients with congestive heart failure before and after heart transplantation"],"prefix":"10.1364","volume":"15","author":[{"given":"Oleg V.","family":"Mamontov","sequence":"first","affiliation":[{"name":"Russian Academy of Sciences"},{"name":"Almazov National Medical Research Centre"},{"name":"Pavlov First Saint Petersburg State Medical University"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3366-8376","authenticated-orcid":true,"given":"Valeriy V.","family":"Zaytsev","sequence":"additional","affiliation":[{"name":"Russian Academy of Sciences"},{"name":"Almazov National Medical Research Centre"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2506-9736","authenticated-orcid":true,"given":"Alexei A.","family":"Kamshilin","sequence":"additional","affiliation":[{"name":"Russian Academy of Sciences"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"285","published-online":{"date-parts":[[2024,1,8]]},"reference":[{"key":"boe-15-2-687-R1","doi-asserted-by":"publisher","first-page":"10","DOI":"10.1113\/expphysiol.2011.057406","volume":"97","author":"Raven","year":"2012","journal-title":"Exp. 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