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Hedayat M, Patel TR, Kim T, Belohlavek M, Hoffmann KR, Borazjani I. A hybrid echocardiography-CFD framework for ventricular flow simulations. INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN BIOMEDICAL ENGINEERING 2020; 36:e03352. [PMID: 32419374 DOI: 10.1002/cnm.3352] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Revised: 05/05/2020] [Accepted: 05/11/2020] [Indexed: 06/11/2023]
Abstract
Image-based CFD is a powerful tool to study cardiovascular flows while 2D echocardiography (echo) is the most widely used noninvasive imaging modality for the diagnosis of heart disease. Here, echo is combined with CFD, that is, an echo-CFD framework, to study ventricular flows. To achieve this, the previous 3D reconstruction from multiple 2D echo at standard cross sections is extended by: (a) reconstructing aortic and mitral valves from 2D echo and closing the left-ventricle (LV) geometry by approximating a superior wall; (b) incorporating the physiological assumption of the fixed apex as a reference (fixed) point in the 3D reconstruction; and (c) incorporating several smoothing algorithms to remove the nonphysical oscillations (ringing) near the basal section. The method is applied to echo from a baseline LV and one after inducing acute myocardial ischemia (AMI). The 3D reconstruction is validated by comparing it against a reference reconstruction from many echo sections while flow simulations are validated against the Doppler ultrasound velocity measurements. The sensitivity study shows that the choice of the smoothing algorithm does not change the flow pattern inside the LV. However, the presence of the mitral valve can significantly change the flow pattern during the diastole phase. In addition, the abnormal shape of a LV with AMI can drastically change the flow during diastole. Furthermore, the hemodynamic energy loss, as an indicator of the LV pumping performance, for different test cases is calculated, which shows a larger energy loss for a LV with AMI compared to the baseline one.
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Affiliation(s)
- Mohammadali Hedayat
- J. Mike Walker '66 Department of Mechanical Engineering, Texas A&M University, College Station, Texas, USA
| | - Tatsat R Patel
- Department of Mechanical and Aerospace Engineering, State University of New York at Buffalo, Buffalo, New York, USA
| | - Taeouk Kim
- J. Mike Walker '66 Department of Mechanical Engineering, Texas A&M University, College Station, Texas, USA
| | - Marek Belohlavek
- Department of Cardiovascular Diseases, Mayo Clinic, Scottsdale, Arizona, USA
| | - Kenneth R Hoffmann
- Department of Neurosurgery, University at Buffalo SUNY, Buffalo, New York, USA
| | - Iman Borazjani
- J. Mike Walker '66 Department of Mechanical Engineering, Texas A&M University, College Station, Texas, USA
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Yu Z, Song F, Jin YC, Zhang WM, Zhang Y, Liu EJ, Zhou D, Bi LL, Yang Q, Li H, Zhang BL, Wang SW. Comparative Pharmacokinetics of Gallic Acid After Oral Administration of Gallic Acid Monohydrate in Normal and Isoproterenol-Induced Myocardial Infarcted Rats. Front Pharmacol 2018; 9:328. [PMID: 29681855 PMCID: PMC5897417 DOI: 10.3389/fphar.2018.00328] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Accepted: 03/21/2018] [Indexed: 11/13/2022] Open
Abstract
Gallic acid (GA) is a polyphenolic natural product widely distributed in food, beverage, and traditional Chinese herbs with beneficial effects on the cardiovascular system. In this research, a comparative study was conducted to investigate the possible difference of pharmacokinetic process in normal and isoproterenol-induced myocardial infarcted rats after oral administration of GA monohydrate with the dose of 50 and 100 mg/kg, respectively. Quantification of GA in rat plasma was achieved by using a simple and rapid high-performance liquid chromatographic method. The results revealed that pharmacokinetics of GA were greatly different between normal and pathological state. GA exhibited slower absorption into the bloodstream, and yielded 1.7-fold (50 mg/kg GA) and 1.3-fold (100 mg/kg GA) less values of area under concentration-time curve as well as 2.5-fold lower of maximum blood concentration (Cmax) in MI rats than those in normal rats. In addition, significant prolonged T1/2 and MRT as well as decreased CL were also registered in MI rats. Our findings suggest that myocardial infarction could alter the pharmacokinetic process of GA, and thus the potential pharmacokinetic differences of herbal preparations (or dietary nutrition) containing GA between normal and pathological conditions should be brought to the forefront seriously in clinical practice.
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Affiliation(s)
- Zhe Yu
- Department of Pharmaceutical Analysis, School of Pharmacy, Fourth Military Medical University, Xi'an, China
| | - Fan Song
- Department of Natural Medicine, School of Pharmacy, Fourth Military Medical University, Xi'an, China
| | - Yu-Chen Jin
- Department of Natural Medicine, School of Pharmacy, Fourth Military Medical University, Xi'an, China.,Cadet Brigade, Fourth Military Medical University, Xi'an, China.,Department of Pharmaceutics, School of Pharmacy, Fourth Military Medical University, Xi'an, China
| | - Wei-Min Zhang
- Department of Natural Medicine, School of Pharmacy, Fourth Military Medical University, Xi'an, China.,Cadet Brigade, Fourth Military Medical University, Xi'an, China
| | - Ya Zhang
- Department of Natural Medicine, School of Pharmacy, Fourth Military Medical University, Xi'an, China
| | - En-Jun Liu
- Department of Natural Medicine, School of Pharmacy, Fourth Military Medical University, Xi'an, China
| | - Dan Zhou
- Department of Natural Medicine, School of Pharmacy, Fourth Military Medical University, Xi'an, China.,Department of Pharmacy, Ninth Hospital of Xi'an, Xi'an, China
| | - Lin-Lin Bi
- Department of Natural Medicine, School of Pharmacy, Fourth Military Medical University, Xi'an, China
| | - Qian Yang
- Department of Natural Medicine, School of Pharmacy, Fourth Military Medical University, Xi'an, China
| | - Hua Li
- Department of Natural Medicine, School of Pharmacy, Fourth Military Medical University, Xi'an, China
| | - Bang-Le Zhang
- Department of Pharmaceutics, School of Pharmacy, Fourth Military Medical University, Xi'an, China
| | - Si-Wang Wang
- Department of Natural Medicine, School of Pharmacy, Fourth Military Medical University, Xi'an, China
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