Farhan Raza, Chris G Lechuga, Oliver Wieben, Naomi C Chesler
{"title":"用心脏磁共振成像与高渗盐水对运动时右心室压力-容积环路进行容积校准：对心室功能和心室-血管耦合的影响。","authors":"Farhan Raza, Chris G Lechuga, Oliver Wieben, Naomi C Chesler","doi":"10.1016/j.healun.2024.10.018","DOIUrl":null,"url":null,"abstract":"<p><strong>Background: </strong>Right ventricular (RV) pressure-volume (PV) loops require postacquisition volume calibration by cardiac MRI (CMR) or hypertonic saline (HS). We defined the impact of these 2 volume calibration methods on rest-to-exercise ventricular contractility (end-systolic elastance: Ees), arterial afterload (Ea), and coupling (Ees/Ea).</p><p><strong>Methods: </strong>In a prospective study, 82 RV PV-loop datapoints (rest, exercise stages every 25 W, and recovery) and CMR were acquired in 19 participants.</p><p><strong>Results: </strong>In comparison to CMR, HS-based calibration overestimated RV end-systolic volume at rest, mean (SD) by +38 ml (48) and end-diastolic volume by +46 ml (68), resulting in underestimated right ventricular ejection fraction (RVEF) by -8%. However, Ees and Ea were similar at rest (r<sup>2</sup> = 0.76 and 0.71, respectively, p < 0.001 for both), and Ees:Ea was identical (r<sup>2</sup> = 1.00, p < 0.001). Exercise metrics also remained similar: RV reserve (ΔEes) and change in coupling (ΔEes/Ea).</p><p><strong>Conclusions: </strong>In comparison to CMR (gold-standard), HS-based calibration underestimates RVEF at rest; however, it is a robust approach for measuring coupling and RV reserve.</p>","PeriodicalId":15900,"journal":{"name":"Journal of Heart and Lung Transplantation","volume":" ","pages":""},"PeriodicalIF":6.4000,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Volume calibration with cardiac MRI versus hypertonic saline for right ventricular pressure-volume loops with exercise: Impact on ventricular function and ventricular-vascular coupling.\",\"authors\":\"Farhan Raza, Chris G Lechuga, Oliver Wieben, Naomi C Chesler\",\"doi\":\"10.1016/j.healun.2024.10.018\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><strong>Background: </strong>Right ventricular (RV) pressure-volume (PV) loops require postacquisition volume calibration by cardiac MRI (CMR) or hypertonic saline (HS). We defined the impact of these 2 volume calibration methods on rest-to-exercise ventricular contractility (end-systolic elastance: Ees), arterial afterload (Ea), and coupling (Ees/Ea).</p><p><strong>Methods: </strong>In a prospective study, 82 RV PV-loop datapoints (rest, exercise stages every 25 W, and recovery) and CMR were acquired in 19 participants.</p><p><strong>Results: </strong>In comparison to CMR, HS-based calibration overestimated RV end-systolic volume at rest, mean (SD) by +38 ml (48) and end-diastolic volume by +46 ml (68), resulting in underestimated right ventricular ejection fraction (RVEF) by -8%. However, Ees and Ea were similar at rest (r<sup>2</sup> = 0.76 and 0.71, respectively, p < 0.001 for both), and Ees:Ea was identical (r<sup>2</sup> = 1.00, p < 0.001). Exercise metrics also remained similar: RV reserve (ΔEes) and change in coupling (ΔEes/Ea).</p><p><strong>Conclusions: </strong>In comparison to CMR (gold-standard), HS-based calibration underestimates RVEF at rest; however, it is a robust approach for measuring coupling and RV reserve.</p>\",\"PeriodicalId\":15900,\"journal\":{\"name\":\"Journal of Heart and Lung Transplantation\",\"volume\":\" \",\"pages\":\"\"},\"PeriodicalIF\":6.4000,\"publicationDate\":\"2024-10-28\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Heart and Lung Transplantation\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1016/j.healun.2024.10.018\",\"RegionNum\":1,\"RegionCategory\":\"医学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CARDIAC & CARDIOVASCULAR SYSTEMS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Heart and Lung Transplantation","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1016/j.healun.2024.10.018","RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CARDIAC & CARDIOVASCULAR SYSTEMS","Score":null,"Total":0}
Volume calibration with cardiac MRI versus hypertonic saline for right ventricular pressure-volume loops with exercise: Impact on ventricular function and ventricular-vascular coupling.
Background: Right ventricular (RV) pressure-volume (PV) loops require postacquisition volume calibration by cardiac MRI (CMR) or hypertonic saline (HS). We defined the impact of these 2 volume calibration methods on rest-to-exercise ventricular contractility (end-systolic elastance: Ees), arterial afterload (Ea), and coupling (Ees/Ea).
Methods: In a prospective study, 82 RV PV-loop datapoints (rest, exercise stages every 25 W, and recovery) and CMR were acquired in 19 participants.
Results: In comparison to CMR, HS-based calibration overestimated RV end-systolic volume at rest, mean (SD) by +38 ml (48) and end-diastolic volume by +46 ml (68), resulting in underestimated right ventricular ejection fraction (RVEF) by -8%. However, Ees and Ea were similar at rest (r2 = 0.76 and 0.71, respectively, p < 0.001 for both), and Ees:Ea was identical (r2 = 1.00, p < 0.001). Exercise metrics also remained similar: RV reserve (ΔEes) and change in coupling (ΔEes/Ea).
Conclusions: In comparison to CMR (gold-standard), HS-based calibration underestimates RVEF at rest; however, it is a robust approach for measuring coupling and RV reserve.
期刊介绍：
The Journal of Heart and Lung Transplantation, the official publication of the International Society for Heart and Lung Transplantation, brings readers essential scholarly and timely information in the field of cardio-pulmonary transplantation, mechanical and biological support of the failing heart, advanced lung disease (including pulmonary vascular disease) and cell replacement therapy. Importantly, the journal also serves as a medium of communication of pre-clinical sciences in all these rapidly expanding areas.
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