{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,23]],"date-time":"2026-10-23T23:49:39Z","timestamp":1792799379933,"version":"4.5.0"},"reference-count":65,"publisher":"Oxford University Press (OUP)","issue":"4","license":[{"start":{"date-parts":[[2023,1,13]],"date-time":"2023-01-13T00:00:00Z","timestamp":1673568000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/pages\/standard-publication-reuse-rights"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2023,3,15]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>Pregnancy is marked by the onset of rapid hemodynamic alterations in order to accommodate the needs of the developing fetus. Arterial stiffness is an independent predictor of cardiovascular events and mortality, and its measurement in clinical practice has been recommended. It follows a U-shaped curve in uncomplicated pregnancy, decreasing to a nadir in mid-pregnancy and rising at term. Systemic vasodilation occurs due to elevated nitric oxide, prostacyclin, endothelium-derived hyperpolarizing factor, estrogen, progesterone, and relaxin. Vascular resistance decreases to a nadir in mid-pregnancy, while endothelial function is enhanced starting in the first trimester. Plasma volume increases by about 50%, and total red blood cell mass increases by up to 40%. Cardiac output increases by up to 45%, at first due primarily to elevated stroke volume, then mainly due to increased heart rate. Along with echocardiography, cardiac magnetic resonance imaging is safe for use in pregnancy. It may assess cardiac function more accurately than echocardiography, and may be indicated in specific clinical cases. Moreover, blood pressure decreases to a nadir in mid-pregnancy and rises to near preconception values postpartum. An appreciation of the vascular changes occurring in healthy pregnancy can aid in the prediction and diagnosis of pregnancy complications, such as preeclampsia and other hypertensive disorders of pregnancy, and inform treatment. In particular, noninvasive arterial stiffness\/hemodynamics assessment provides unique clinical information beyond blood pressure and traditional maternal characteristics, and can signal a need for further testing, or be used in combination with other tests to predict or diagnose complications of pregnancy.<\/jats:p>","DOI":"10.1093\/ajh\/hpac132","type":"journal-article","created":{"date-parts":[[2023,1,13]],"date-time":"2023-01-13T20:46:39Z","timestamp":1673642799000},"page":"183-191","source":"Crossref","is-referenced-by-count":34,"title":["Alterations in Vessel Hemodynamics Across Uncomplicated Pregnancy"],"prefix":"10.1093","volume":"36","author":[{"given":"Alvin","family":"Kuate Defo","sequence":"first","affiliation":[{"name":"Vascular Health Unit, Research Institute of the McGill University Health Centre, Department of Medicine, Faculty of Medicine, McGill University , Montreal, Quebec , Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4774-2549","authenticated-orcid":false,"given":"Stella S","family":"Daskalopoulou","sequence":"additional","affiliation":[{"name":"Vascular Health Unit, Research Institute of the McGill University Health Centre, Department of Medicine, Faculty of Medicine, McGill University , Montreal, Quebec , Canada"},{"name":"Division of Internal Medicine, Department of Medicine, McGill University Health Centre, McGill University , Montreal, Quebec , Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","published-online":{"date-parts":[[2023,1,13]]},"reference":[{"key":"2023031513253226100_","doi-asserted-by":"crossref","first-page":"522","DOI":"10.1161\/HYPERTENSIONAHA.118.11191","article-title":"Cardiovascular system in preeclampsia and 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