Kei Sato, Louise See Hoe, Jonathan Chan, Nchafatso G. Obonyo, Karin Wildi, Silver Heinsar, Sebastiano M. Colombo, Carmen Ainola, Gabriella Abbate, Noriko Sato, Margaret R. Passmore, Mahe Bouquet, Emily S. Wilson, Kieran Hyslop, Samantha Livingstone, Andrew Haymet, Jae-Seung Jung, Kris Skeggs, Chiara Palmieri, Nicole White, David Platts, Jacky Y. Suen, David C. McGiffin, Gianluigi Li Bassi, John F. Fraser
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We propose a novel non-invasive echocardiographic parameter, Pressure-Strain Product (PSP), as a potential surrogate of catheter-based LVSWI. This study aimed to investigate if PSP could correlate with catheter-based LVSWI in an ovine model of brain stem death (BSD) donors. The association between PSP and myocardial mitochondrial function in the post-transplant hearts was also evaluated.</p>\n </section>\n \n <section>\n \n <h3> Methods</h3>\n \n <p>Thirty-one female sheep (weight 47 ± 5 kg) were divided into two groups; BSD (<i>n</i> = 15), and sham neurologic injury (<i>n</i> = 16). Echocardiographic parameters including global circumferential strain (GCS) and global radial strain (GRS) and pulmonary artery catheter-based LVSWI were simultaneously measured at 8-timepoints during 24-h observation. PSP was calculated as a product of GCS or GRS, and mean arterial pressure for PSP<sub>circ</sub> or PSP<sub>rad</sub>, respectively. Myocardial mitochondrial function was evaluated following 6-h observation after heart transplantation.</p>\n </section>\n \n <section>\n \n <h3> Results</h3>\n \n <p>In BSD donor hearts, PSP<sub>circ</sub> (<i>n</i> = 96, rho = .547, <i>p</i> < .001) showed the best correlation with LVSWI among other echocardiographic parameters. PSP<sub>circ</sub> returned AUC of .825 to distinguish higher values of cardiomyocyte mitochondrial function (cut-off point; mean value of complex 1,2 O<sub>2</sub> Flux) in post-transplant hearts, which was greater than other echocardiographic parameters.</p>\n </section>\n \n <section>\n \n <h3> Conclusions</h3>\n \n <p>PSP<sub>circ</sub> could be used as a surrogate of catheter-based LVSWI reflecting mitochondrial function.</p>\n </section>\n </div>","PeriodicalId":12013,"journal":{"name":"European Journal of Clinical Investigation","volume":"54 10","pages":""},"PeriodicalIF":4.4000,"publicationDate":"2024-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/eci.14259","citationCount":"0","resultStr":"{\"title\":\"Echocardiographic surrogate of left ventricular stroke work in a model of brain stem death donors\",\"authors\":\"Kei Sato, Louise See Hoe, Jonathan Chan, Nchafatso G. 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We propose a novel non-invasive echocardiographic parameter, Pressure-Strain Product (PSP), as a potential surrogate of catheter-based LVSWI. This study aimed to investigate if PSP could correlate with catheter-based LVSWI in an ovine model of brain stem death (BSD) donors. The association between PSP and myocardial mitochondrial function in the post-transplant hearts was also evaluated.</p>\\n </section>\\n \\n <section>\\n \\n <h3> Methods</h3>\\n \\n <p>Thirty-one female sheep (weight 47 ± 5 kg) were divided into two groups; BSD (<i>n</i> = 15), and sham neurologic injury (<i>n</i> = 16). Echocardiographic parameters including global circumferential strain (GCS) and global radial strain (GRS) and pulmonary artery catheter-based LVSWI were simultaneously measured at 8-timepoints during 24-h observation. PSP was calculated as a product of GCS or GRS, and mean arterial pressure for PSP<sub>circ</sub> or PSP<sub>rad</sub>, respectively. 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Echocardiographic surrogate of left ventricular stroke work in a model of brain stem death donors
Background
The commonest echocardiographic measurement, left ventricular ejection fraction, can not necessarily predict mortality of recipients following heart transplantation potentially due to afterload dependency. Afterload-independent left ventricular stroke work index (LVSWI) is alternatively recommended by the current guideline; however, pulmonary artery catheters are rarely inserted in organ donors in most jurisdictions. We propose a novel non-invasive echocardiographic parameter, Pressure-Strain Product (PSP), as a potential surrogate of catheter-based LVSWI. This study aimed to investigate if PSP could correlate with catheter-based LVSWI in an ovine model of brain stem death (BSD) donors. The association between PSP and myocardial mitochondrial function in the post-transplant hearts was also evaluated.
Methods
Thirty-one female sheep (weight 47 ± 5 kg) were divided into two groups; BSD (n = 15), and sham neurologic injury (n = 16). Echocardiographic parameters including global circumferential strain (GCS) and global radial strain (GRS) and pulmonary artery catheter-based LVSWI were simultaneously measured at 8-timepoints during 24-h observation. PSP was calculated as a product of GCS or GRS, and mean arterial pressure for PSPcirc or PSPrad, respectively. Myocardial mitochondrial function was evaluated following 6-h observation after heart transplantation.
Results
In BSD donor hearts, PSPcirc (n = 96, rho = .547, p < .001) showed the best correlation with LVSWI among other echocardiographic parameters. PSPcirc returned AUC of .825 to distinguish higher values of cardiomyocyte mitochondrial function (cut-off point; mean value of complex 1,2 O2 Flux) in post-transplant hearts, which was greater than other echocardiographic parameters.
Conclusions
PSPcirc could be used as a surrogate of catheter-based LVSWI reflecting mitochondrial function.
期刊介绍：
EJCI considers any original contribution from the most sophisticated basic molecular sciences to applied clinical and translational research and evidence-based medicine across a broad range of subspecialties. The EJCI publishes reports of high-quality research that pertain to the genetic, molecular, cellular, or physiological basis of human biology and disease, as well as research that addresses prevalence, diagnosis, course, treatment, and prevention of disease. We are primarily interested in studies directly pertinent to humans, but submission of robust in vitro and animal work is also encouraged. Interdisciplinary work and research using innovative methods and combinations of laboratory, clinical, and epidemiological methodologies and techniques is of great interest to the journal. Several categories of manuscripts (for detailed description see below) are considered: editorials, original articles (also including randomized clinical trials, systematic reviews and meta-analyses), reviews (narrative reviews), opinion articles (including debates, perspectives and commentaries); and letters to the Editor.
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