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Publications

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  • Resection of a Giant Epithelioid Hemangioendothelioma Arising from the Superior Vena Cava. The Annals of thoracic surgery Elliott, I. A., Kasinpila, P., Guenthart, B. A., MacArthur, J. W., Berry, M. F. 2021

    Abstract

    Epithelioid hemangioendothelioma is a rare malignant vascular sarcoma. Here we present a patient with a very large tumor arising from the superior vena cava (SVC), in whom a resection with negative margins was accomplished using veno-venous bypass and bovine pericardial patch reconstruction of the SVC.

    View details for DOI 10.1016/j.athoracsur.2021.01.034

    View details for PubMedID 33529605

  • Use of patient-specific computational models for optimization of aortic insufficiency after implantation of left ventricular assist device. The Journal of thoracic and cardiovascular surgery Kasinpila, P. n., Kong, S. n., Fong, R. n., Shad, R. n., Kaiser, A. D., Marsden, A. L., Woo, Y. J., Hiesinger, W. n. 2020

    Abstract

    Aortic incompetence (AI) is observed to be accelerated in the continuous-flow left ventricular assist device (LVAD) population and is related to increased mortality. Using computational fluid dynamics (CFD), we investigated the hemodynamic conditions related to the orientation of the LVAD outflow in these patients.We identified 10 patients with new aortic regurgitation, and 20 who did not, after LVAD implantation between 2009 and 2018. Three-dimensional models of patients' aortas were created from their computed tomography scans. The geometry of the LVAD outflow graft in relation to the aorta was quantified using azimuth angles (AA), polar angles (PAs), and distance from aortic root. The models were used to run CFD simulations, which calculated the pressures and wall shear stress (rWSS) exerted on the aortic root.The AA and PA were found to be similar. However, for combinations of high values of AA and low values of PA, there were no patients with AI. The distance from aortic root to the outflow graft was also smaller in patients who developed AI (3.390.7 vs 4.070.77cm, P=.04). There was no significant difference in aortic root pressures in the 2 groups. The rWSS was greater in AI patients (4.605.70 vs 2.371.20dyne/cm2, P<.001). Qualitatively, we observed a trend of greater perturbations, regions of high rWSS, and flow eddies in the AI group.Using CFD simulations, we demonstrated that patients who developed de novo AI have greater rWSS at the aortic root, and their outflow grafts were placed closer to the aortic roots than those patients without de novo AI.

    View details for DOI 10.1016/j.jtcvs.2020.04.164

    View details for PubMedID 32653292

  • Modeling conduit choice for valve-sparing aortic root replacement on biomechanics with a 3-dimensional-printed heart simulator JOURNAL OF THORACIC AND CARDIOVASCULAR SURGERY Paulsen, M. J., Kasinpila, P., Imbrie-Moore, A. M., Wang, H., Hironaka, C. E., Koyano, T. K., Fong, R., Chiu, P., Goldstone, A. B., Steele, A. N., Stapleton, L. M., Ma, M., Woo, Y. 2019; 158 (2): 392?403
  • Modeling conduit choice for valve-sparing aortic root replacement on biomechanics with a 3-dimensional-printed heart simulator. The Journal of thoracic and cardiovascular surgery Paulsen, M. J., Kasinpila, P., Imbrie-Moore, A. M., Wang, H., Hironaka, C. E., Koyano, T. K., Fong, R., Chiu, P., Goldstone, A. B., Steele, A. N., Stapleton, L. M., Ma, M., Woo, Y. J. 2018

    Abstract

    OBJECTIVE: The optimal conduit for valve-sparing aortic root replacement is still debated, with several conduit variations available, ranging from straight tubular grafts to Valsalva grafts. Benefits of neosinus reconstruction include enhanced flow profiles and improved hemodynamics. Curiously, however, some clinical data suggest that straight grafts may have greater long-term durability. In this study, we hypothesized that straight tubular grafts may help maintain the native cylindrical position of the aortic valve commissures radially, resulting in preserved leaflet coaptation, reduced stresses, and potentially improved valve performance.METHODS: Using 3D printing, a left heart simulator with a valve-sparing root replacement model and a physiologic coronary circulation was constructed. Aortic valves were dissected from fresh porcine hearts and reimplanted into either straight tubular grafts (n=6) or Valsalva grafts (n=6). Conduits were mounted into the heart simulator and hemodynamic, echocardiographic, and high-speed videometric data were collected.RESULTS: Hemodynamic parameters and coronary blood flow were similar between straight and Valsalva grafts, although the former were associated with lower regurgitant fractions, less peak intercommissural radial separation, preserved leaflet coaptation, decreased leaflet velocities, and lower relative leaflet forces compared with Valsalva grafts.CONCLUSIONS: Valsalva grafts and straight grafts perform equally well in terms of gross hemodyanics and coronary blood flow. Interestingly, however, the biomechanics of these 2 conduits differ considerably, with straight grafts providing increased radial commissural stability and leaflet coaptation. Further investigation into how these parameters influence clinical outcomes is warranted.

    View details for PubMedID 30745047

  • Heart-lung transplantation over the past 10 years: an up-to-date concept. European journal of cardio-thoracic surgery : official journal of the European Association for Cardio-thoracic Surgery Shudo, Y., Kasinpila, P., Lingala, B., Kim, F. Y., Woo, Y. J. 2018

    Abstract

    OBJECTIVES: Heart-lung transplantation has been established as an effective treatment for patients with advanced cardiopulmonary failure. Over the years, the number of operations performed has declined. In 2015, only 38 adult heart-lung transplants were reported worldwide. Since then, we have performed 16 operations in high-acuity patients with excellent postoperative outcomes. Herein, we review our single-centre experience with heart-lung transplantation over the past 10 years.METHODS: We retrospectively reviewed 49 heart-lung transplant recipients between 2008 and 2018 to investigate the patient characteristics and outcomes while comparing those results across 2 cohorts (2008-2015, Era I, n=30 and 2016-2018, Era II, n=19).RESULTS: Our patient demographics and waitlist time did not significantly change over time. However, the lung allocation score was significantly higher in Era II compared to Era I (51.119.8 in Era II and 41.619.5 in Era I; P=0.006). We also observed a higher rate-while not statistically significant-of preoperative and postoperative use of mechanical circulatory support in the present era. Although there is a trend of higher acuity in the present era, we continue to have excellent outcomes with 100% 30-day and 1-year survival.CONCLUSIONS: These results suggest that in a high-volume heart-lung transplant programme, excellent postoperative outcomes can be achieved even in patients with rapid and severe cardiopulmonary decline and that, to this day, heart-lung transplantation remains a viable option for patients with advanced cardiopulmonary disease.

    View details for PubMedID 30260389

  • To repair or to replace: four decades in the making ANNALS OF TRANSLATIONAL MEDICINE Kasinpila, P., Woo, Y. 2018; 6 (7)
  • Ambulating femoral venoarterial extracorporeal membrane oxygenation bridge to heart-lung transplant. The Journal of thoracic and cardiovascular surgery Shudo, Y., Kasinpila, P., Lee, A. M., Rao, V. K., Woo, Y. J. 2018

    View details for PubMedID 29628344

  • To repair or to replace: four decades in the making. Annals of translational medicine Kasinpila, P. n., Woo, Y. J. 2018; 6 (7): 125

    View details for PubMedID 29955585

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