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Personalized Computer Simulation of diastolic function in Heart Failure

Genomics, Proteomics & Bioinformatics 2016年第4期14卷 244-252页

作者： Ali Amr Elham Kayvanpour Farbod Sedaghat-Hamedani Tiziano Passerini Viorel Mihalef Alan Lai Dominik Neumann Bogdan Georgescu Sebastian Buss Derliz Mercies Edgar Zitron Andreas E. Posch Maximilian Wurstle Tommaso Mansi Hugo A. Katus Benjamin Meder Institute for Cardiomyopathies Department of Medicine IIIUniversity of Heidelberg69120 Heidelberg.Germany German Centre for Cardiovascular Research(DZHK) Heidelberg/MannlleimGermany Siemens Healthcare Medical Imaging TechnologiesPrincetonNJ 08540USA Siemens Healthcare Strategy and Innovation91052 ErlangenGermany

The search for a parameter representing left ventricular relaxation from non-invasive and invasive diagnostic tools has been extensive, since heart failure （HF） with preserved ejection fraction （HF-pEF） is a global health problem. We explore here the feasibility using patient-specific cardiac computer modeling to capture diastolic parameters in patients suffering from different degrees of systolic HF. Fifty eight patients with idiopathic dilated cardiomyopathy have undergone thorough clinical evaluation, including cardiac magnetic resonance imaging （MRI）, heart catheterization, echocardiography, and cardiac biomarker assessment. A previously-introduced framework for creating multi-scale patient-specific cardiac models has been applied on all these patients. Novel parameters, such as global stiffness factor and maximum left ventricular active stress, representing cardiac active and passive tissue properties have been computed for all patients. Invasive pressure measurements from heart catheterization were then used to evaluate ventricular relaxation using the time constant of isovolumic relaxation Tau （τ）. Parameters from heart catheterization and the multi-scale model have been evaluated and compared to patient clinical presentation. The model parameter global stiffness factor, representing diastolic passive tissue properties, is correlated significantly across the patient population with τ. This study shows that multi-modal cardiac models can successfully capture diastolic （dys） function, a prerequisite for future clinical trials on HF-pEF.

关键词： Dilated cardiomyopathy Tau Myocardial stiffness Computer-based 3D modelPersonalized medicine diastolic function

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18β-Glycyrrhetinic Acid Improves Cardiac diastolic function by Attenuating Intracellular Calcium Overload

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Current Medical Science 2020年第4期40卷 654-661页

作者： Jun HAN Guan-hua SU Yu-hui WANG Yong-xin LU Hong-liang ZHAO Xin-xin SHUAI Department of Cardiology Wuhan Fourth HospitalPuai HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430033China Department of Cardiology Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022China

Summary:Ranolazine,a late sodium current inhibitor,has been demonstrated to be effective on heart failure.18B-glycyrrhetinic acid(18β-GA)has the similar inhibitory effect on late sodium ***,its effect on diastolic function is still *** study aimed to determine whether 18β-GA can improve the diastolic function and to explore the underlying *** male Sprague Dawley(SD)rats of Langendorff model were randomly divided into the following groups:group A,normal cardiac perfusion group;group B,ischemia-reperfusion group;group C,ischemia-reperfusion with anemoniasulcata toxinⅡ(ATX-Ⅱ);group D,ranolazine group;and group E,18β-GA group with four different ***,a pressure-overloaded rat model induced by trans-aortic constriction(TAC)was *** and hemodynamics were used to evaluate diastolic function at 14th day after *** of free intracellular calcium(Ca27)concentration was indirectly detected by laser scanning confocal microscope to confirm the inhibition of late sodium *** the intervention of ATX-Ⅱon ischemia reperfusion injury group,5 umol/L ranolazine,and 5,10,20,40μmol/L 18β-GA could improve ATX-I-induced cardiac diastolic dysfunction.630 mg/kg glycyrrhizin tablets could improve cardiac diastolic function in the pressure-overloaded rats.18B-GA and ranolazine had similar effects on reducing the free calcium in *** study demonstrates that 18B-GA and glycyrrhizin could improve diastolic dysfunction induced by ischemia-reperfusion injury in Langendorff-perfused rat hearts and pressure-overloaded *** mechanism may be attributed to the inhibition of enhanced late sodium currents.

关键词： glycyrrhetinic acid diastolic function calcium overload

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Impaired diastolic function in nave untreated human immunodeficiency virus infected patients

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World Journal of Cardiology 2010年第4期2卷 98-103页

作者： Ugo Oliviero Giovanni Bonadies Giorgio Bosso Maria Foggia Valentina Apuzzi Mariarosaria Cotugno Antonio Valvano Enrico Leonardi Guglielmo Borgia Giuseppe Castello Raffaele Napoli Luigi Saccà Department of Inter-nal Medicine University Federico Ⅱ80131 NaplesItaly Department of Infectious Diseases University Federico Ⅱ80131 NaplesItaly National Cancer Institute G.Pascale Foundation80131 NaplesItaly

AIM:To evaluate cardiac function and structure in un-treated human immunodeficiency virus(HIV) patients without clinical evidence of cardiovascular ***:Fifty-three nave untreated HIV-infected patients and 56 healthy control subjects underwent clinical assessment,electrocardiography(ECG) and echocardiography,including tissue doppler ***,a set of laboratory parameters was obtained from all subjects,including HIV-RNA plasma levels,CD4 cell counts and tumor necrosis factor-α ***:The two groups showed normal ECG traces and no differences regarding systolic morphologic *** contrast,a higher prevalence of left ventricular diastolic dysfunction(abnormal relaxation or pseudonormal filling pattern) was found in the HIV patients(36% vs 9% in patients and controls,respec-tively,P diastolic dys-function.

关键词： diastolic function Human immunodeficiency virus Naive subjects Cardiovascular risk factors

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Racial Differences in Left Ventricular Filling Pressure Following Acute Aerobic Exercise Between Chinese and Caucasians

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Journal of Science in Sport and Exercise 2022年第3期4卷 275-282页

作者： Peng Sun Huimin Yan Sushant M.Ranadive Abbi D.Lane Rebecca MKappus Tracy Baynard Xiaodan Sun Shichang Li Bo Fernhall Key Laboratory of Adolescent Health Assessment and Exercise Intervention Ministry of EducationEast China Normal UniversityShanghaiPeople’s Republic of China College of Applied Health Sciences University of Illinois at ChicagoChicagoILUSA Department of Kinesiology and Community Health University of Illinois at Urbana-ChampaignChampaignILUSA Damujia Central Health Center WeifangShandongPeople’s Republic of China

Background Left ventricular filling pressure(LVFP)is an important early indicator of heart failure that is more prevalent in Caucasians than ***-induced change in LVFP may provide more incremental information to assess dias-tolic *** it was unknown whether there was difference in LVFP following acute exercise between Caucasians and *** The purpose of this study was to investigate the change of LVFP following an acute 45-min aerobic exercise in healthy Caucasian and Chinese *** Sixty participants(30 Caucasians and 30 Chinese,half was male,respectively)performed an acute bout of aero-bic exercise at 70%of heart rate ***,Left ventricle(LV)morphology and function parameters were measured at baseline,then at 30-min and 60-min *** There was a similar LV ejection fraction,LV fraction shorten,lateral E/eʹand lateral eʹbetween Chinese and Caucasians at *** was a significant race-by-time interaction in lateral E/eʹand lateral eʹbetween Chinese and Caucasians from pre-exercise to 30 min and 60 min after acute aerobic ***ΔE/eʹwas significant correlated with baseline systolic blood *** The change of LVFP was different between Chinese and Caucasians following acute aerobic *** racial differences may be primarily caused by the changes of LV relaxation following exercise,baseline systolic blood pressure may also contribute to the differences.

关键词： diastolic function Left ventricular filling pressure Racial differences

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Assessment of cardiac function in absence of congenital and acquired heart disease in patients with Down syndrome

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世界儿科杂志:英文版 2016年第4期12卷 463-469页

作者： Sevket Balli Ilker Kemal Yucel Ayse Esin Kibar Ibrahim Ece Eylem Sen Dalkiran Sukru Candan Department of Pediatric Cardiology Balikesir Ataturk HospitalBalikesirTurkey Department of Pediatric Cardilogy Siyami Ersek Education and Research HospitalIstanbulTurkey Department of Pediatric Cardiology Children's HospitalMersinTurkey Department of Pediatric Cardiology Yuzuncu Yil University of MedicineVanTurkey Department of Pediatrics Balikesir Ataturk HospitalBalikesirTurkey Department of Medical Genetics Balikesir Ataturk HospitalBalikesirTurkey

Background:Extra genetic material in patients with Down syndrome(DS)may affect the function of any organ *** evaluated cardiac functions using conventional tissue Doppler and two-dimensional speckle tracking echocardiography in patients with DS in the absence of congenital and acquired heart disease in ***:A total of 115 patients with DS between 6 and 13 years of age with clinically and anatomically normal heart and 55 healthy children were included in this cross-sectional *** was diagnosed by a karyotype *** with mosaic type were not included in this *** and diastolic functions were evaluated by ***:Pulsed waved Doppler transmitral early/late inflow velocity(E/A),tissue Doppler mitral annular early/late diastolic peak velocity(Ea/Aa),transtricuspid E/A and tricuspid valve annulus Ea/Aa,pulmonary venous Doppler systolic/diastolic(S/D)wave ratio were lower in patients with Down syndrome than in the control group(P=0.04,P=0.001,Pfunction and identifying a higher incidence of biventricular dysfunction in patients with Down syndrome compared with the healthy controls.

关键词： diastolic function Down syndrome strain imaging analysis systolic function tissue Doppler

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Detection of Left Ventricular Regional Relaxation Abnormalities in Patients with Hypertrophic Cardiomyopathy by Quantitative Tissue Velocity Imaging

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Journal of Huazhong University of Science and Technology(Medical Sciences) 2004年第2期24卷 185-188页

作者：潘敏邓又斌常青杨好意毕小军向慧娟黎春蕾 Department of Medical Ultrasound Tongji Hospital Tongji Medical College Huazhong University of Science and Technology

To assess the left ventricular regional relaxation abnormalities in patients with hypertrophic cardiomyopathy (HCM) by quantitative tissue velocity imaging (QTVI), Doppler echocardiography and QTVI were performed in HCM (n=10) and healthy subjects (n=11) at apical long-axis, two-chamber and four-chamber views. Regional early diastolic velocity (rVe) and regional atrial contraction (rVa) were measured at each segment of ventricular middle, basal and annular levels. Mean rVe and mean rVa at three levels as well as mean rVe/rVa ratio were calculated. Our results showed that transmitral inflow peak velocities during early diastole (E) and atrial contraction (A) were also measured and E/A ratio was calculated. The rVe of all left ventricular segments in HCM were lower than those in healthy subjects (Pfunction independently. QTVI is more sensitive and more accurate than conventional Doppler imaging for characterizingregional diastolic properties in HCM.

关键词： hypertrophy cardiomyopathy echocardiography imaging diastolic function

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