ArticlePhysiological reports2017
Comparison of multiple non-invasive methods of measuring cardiac output during pregnancy reveals marked heterogeneity in the magnitude of cardiac output change between women.
Article in Physiological reports, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers, 1 of them a synthesis that pooled it.
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Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
11 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Cardiac output and peripheral vascular resistance during normotensive and hypertensive pregnancy - a systematic review and meta-analysis.BJOG : an international journal of obstetrics and gynaecology · 2022Pooled it
- Observational
- Measurement errors in serial echocardiographic assessments of aortic valve stenosis severity.The international journal of cardiovascular imaging · 2020Article
- Association between thyroid-stimulating hormone and maternal hemodynamics in hypertensive disorders of pregnancy: an observational study.BMC pregnancy and childbirth · 2019Observational
- Maternal Cardiovascular Dysregulation During Early Pregnancy After In Vitro Fertilization Cycles in the Absence of a Corpus Luteum.Hypertension (Dallas, Tex. : 1979) · 2019Article
- Is a frozen embryo transfer in a programmed cycle really the best option?Journal of assisted reproduction and genetics · 2019Article
- Effect of Mode of Conception on Maternal Serum Relaxin, Creatinine, and Sodium Concentrations in an Infertile Population.Reproductive sciences (Thousand Oaks, Calif.) · 2019Article
- Wave reflections and global arterial compliance during normal human pregnancy.Physiological reports · 2018Article
- Asthma Outcomes and Management During Pregnancy.Chest · 2018Review
- Comparison of multiple non-invasive methods of measuring cardiac output during pregnancy reveals marked heterogeneity in the magnitude of cardiac output change between women.Physiological reports · 2017Article
- Comparative study between suprasternal and apical windows: a user-friendly cardiac output measurement for the anesthesiologist.Brazilian journal of anesthesiology (Elsevier)Article
Corrections and comments
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Authors and funding
8 authors.
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Abstract
Various non-invasive methods are available to measure cardiac output (CO) during pregnancy. We compared serial measures of CO using various methods to determine which provided the least variability. Ten patients with spontaneous pregnancy had estimation of CO at baseline prior to becoming pregnant and at the end of the first and third trimesters. Echocardiographic data were used to estimate CO using the Teichholz method, Simpson's biplane method, and the Doppler determined velocity time integral (VTI) method. In addition, a Bioz Dx device was used to estimate CO by impedance cardiography. CO estimated with the VTI method had the lowest beat-to-beat variability. CO estimated with the VTI method was higher than CO estimated with the 2D-Teichholz method and Simpson's method. The percent change in CO during pregnancy was similar for all echo methods (VTI, Teichholz, and Simpson's biplane). Baseline CO determined with impedance cardiography was higher than CO determined with the VTI method. However, change in CO during pregnancy was significantly lower when measured with impedance cardiography. There was marked heterogeneity in the degree of rise in CO during the first trimester (-3 to 55%). The wide variation in the gestational rise in CO was unexpected, and at least in part secondary to variable increase in heart rate. We recommend the use of the Doppler determined VTI method for the estimation of CO in pregnancy.
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