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Kesieme EB, Buchan KG. Clinical anatomy of the coronary venous system and relevance to retrograde cardioplegia and cardiac electrophysiological interventions. Clin Anat 2024. [PMID: 38867517 DOI: 10.1002/ca.24195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Revised: 05/11/2024] [Accepted: 05/31/2024] [Indexed: 06/14/2024]
Abstract
Anomalies of coronary venous system, the valve of the coronary sinus (Thebesian valve) and other cardiac malformations may make interventions through the coronary sinus difficult. These variants may pose a challenge in cannulating the coronary sinus for retrograde cardioplegia and for interventions performed through the coronary sinus by cardiac electrophysiologist/interventional cardiologist. Retrograde cardioplegia is an established method of myocardial protection with advantages, indications, and complications. A good knowledge of the anatomy of the coronary sinus and its variants is important in understanding the difficulties encountered while cannulating the coronary sinus for the delivery of retrograde cardioplegia, cardiac resynchronization therapy, treatment of arrhythmias, and percutaneous mitral valve annuloplasty.
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Affiliation(s)
| | - Keith Gunn Buchan
- Department of Cardiothoracic Surgery, Aberdeen Royal Infirmary, Aberdeen, UK
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2
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Choy JS, Hubbard T, Wang H, Awakeem Y, Khosravi P, Khadivi B, Navia JA, Stone GW, Lee LC, Kassab GS. Preconditioning with selective autoretroperfusion: In vivo and in silico evidence of washout hypothesis. Front Bioeng Biotechnol 2024; 12:1386713. [PMID: 38798957 PMCID: PMC11117169 DOI: 10.3389/fbioe.2024.1386713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Accepted: 04/23/2024] [Indexed: 05/29/2024] Open
Abstract
Introduction Prompt reperfusion of coronary artery after acute myocardial infarction (AMI) is crucial for minimizing heart injury. The myocardium, however, may experience additional injury due to the flow restoration itself (reperfusion injury, RI). The purpose of this study was to demonstrate that short preconditioning (10 min) with selective autoretroperfusion (SARP) ameliorates RI, based on a washout hypothesis. Methods AMI was induced in 23 pigs (3 groups) by occluding the left anterior descending (LAD) artery. In SARP-b (SARP balloon inflated) and SARP-nb (SARP balloon deflated) groups, arterial blood was retroperfused for 10 min via the great cardiac vein before releasing the arterial occlusion. A mathematical model of coronary circulation was used to simulate the SARP process and evaluate the potential washout effect. Results SARP restored left ventricular function during LAD occlusion. Ejection fraction in the SARP-b group returned to baseline levels, compared to SARP-nb and control groups. Infarct area was significantly larger in the control group than in the SARP-b and SARP-nb groups. End-systolic wall thickness was preserved in the SARP-b compared to the SARP-nb and control groups. Analyte values (pH, lactate, glucose, and others), measured every 2 min during retroperfusion, suggest a "washout" effect as one important mechanism of action of SARP in reducing infarct size. With SARP, the values progressively approached baseline levels. The mathematical model also confirmed a possible washout effect of tracers. Discussion RI can be ameliorated by delaying restoration of arterial flow for a brief period of time while pretreating the infarction with SARP to restore homeostasis via a washout mechanism.
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Affiliation(s)
- Jenny S. Choy
- California Medical Innovations Institute, Inc., San Diego, CA, United States
| | | | - Haifeng Wang
- Department of Mechanical Engineering, Michigan State University, East Lansing, MI, United States
| | - Yousif Awakeem
- California Medical Innovations Institute, Inc., San Diego, CA, United States
| | | | - Bahram Khadivi
- Scripps Memorial Hospital, Division of Cardiology, La Jolla, CA, United States
| | - Jose A. Navia
- Department of Surgery, Austral University, Buenos Aires, Argentina
| | - Gregg W. Stone
- Division of Cardiology, Department of Medicine, Icahn School of Medicine at Mount Sinai, The Zena and Michael A. Wiener Cardiovascular Institute, New York, United States
| | - Lik Chuan Lee
- Department of Mechanical Engineering, Michigan State University, East Lansing, MI, United States
| | - Ghassan S. Kassab
- California Medical Innovations Institute, Inc., San Diego, CA, United States
- 3DT Holdings, LLC, San Diego, CA, United States
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3
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Wang H, Fan L, Choy JS, Kassab GS, Lee LC. Mechanisms of coronary sinus reducer for treatment of myocardial ischemia: in silico study. J Appl Physiol (1985) 2024; 136:1157-1169. [PMID: 38511210 PMCID: PMC11368528 DOI: 10.1152/japplphysiol.00910.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 03/18/2024] [Accepted: 03/19/2024] [Indexed: 03/22/2024] Open
Abstract
The coronary sinus reducer (CSR) is an emerging medical device for treating patients with refractory angina, often associated with myocardial ischemia. Patients implanted with CSR have shown positive outcomes, but the underlying mechanisms are unclear. This study sought to understand the mechanisms of CSR by investigating its effects on coronary microcirculation hemodynamics that may help explain the therapy's efficacy. We applied a validated computer model of the coronary microcirculation to investigate how CSR affects hemodynamics under different degrees of coronary artery stenosis. With moderate coronary stenosis, an increase in capillary transit time (CTT) [up to 69% with near-complete coronary sinus (CS) occlusion] is the key change associated with CSR. Because capillaries in the microcirculation can still receive oxygenated blood from the upstream artery with moderate stenosis, the increase in CTT allows more time for the exchange of gases and nutrients, aiding tissue oxygenation. With severe coronary stenosis; however, the redistribution of blood draining from the nonischemic region to the ischemic region (up to 96% with near-complete CS occlusion) and the reduction in capillary flow heterogeneity are the key changes associated with CSR. Because blood draining from the nonischemic region is not completely devoid of O2, the redistribution of blood to the capillaries in the ischemic region by CSR is beneficial especially when little or no oxygenated blood reaches these capillaries. This simulation study provides insights into the mechanisms of CSR in improving clinical symptoms. The mechanisms differ with the severity of the upstream stenosis.NEW & NOTEWORTHY Emerging coronary venous retroperfusion treatments, particularly coronary sinus reducer (CSR) for refractory angina linked to myocardial ischemia, show promise; however, their mechanisms of action are not well understood. We find that CSR's effectiveness varies with the severity of coronary stenosis. In moderate stenosis, CSR improves tissue oxygenation by increasing capillary transit time, whereas in severe stenosis, it redistributes blood from nonischemic to ischemic regions and reduces capillary flow heterogeneity.
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Affiliation(s)
- Haifeng Wang
- Department of Mechanical Engineering, Michigan State University, East Lansing, Michigan, United States
| | - Lei Fan
- Joint Department of Biomedical Engineering, Marquette University and Medical College of Wisconsin, Milwaukee, Wisconsin, United States
| | - Jenny S Choy
- California Medical Innovations Institute, San Diego, California, United States
| | - Ghassan S Kassab
- California Medical Innovations Institute, San Diego, California, United States
| | - Lik Chuan Lee
- Department of Mechanical Engineering, Michigan State University, East Lansing, Michigan, United States
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4
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Choy JS, Hubbard T, Golts EM, Bhatt DL, Navia JA, Kassab GS. Pre-arterialization of coronary veins prior to retroperfusion of ischemic myocardium: percutaneous closure device. Front Cardiovasc Med 2023; 10:1208903. [PMID: 37790598 PMCID: PMC10543752 DOI: 10.3389/fcvm.2023.1208903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Accepted: 08/31/2023] [Indexed: 10/05/2023] Open
Abstract
Background Chronic coronary retroperfusion to treat myocardial ischemia has previously failed due to edema and hemorrhage of coronary veins suddenly exposed to arterial pressures. The objective of this study was to selectively adapt the coronary veins to become arterialized prior to coronary venous retroperfusion to avoid vascular edema and hemorrhage. Methods and results In 32 animals (Group I = 19 and Group II = 13), the left anterior descending (LAD) artery was occluded using an ameroid occlusion model. In Group I, the great cardiac vein was blocked with suture ligation (Group IA = 11) or with occlusion device (Group IB = 8) to arterialize the venous system within 2 weeks at intermediate pressure (between arterial and venous levels) before a coronary venous bypass graft (CVBG) was implemented through a left internal mammary artery (LIMA) anastomosis. Group II only received the LAD artery occlusion and served as control. Serial echocardiograms showed recovery of left ventricular (LV) function with this adaptation-arterialization approach, with an increase in ejection fraction (EF) in Group I from 38% ± 5% after coronary occlusion to 53% ± 7% eight weeks after CVBG, whereas in Group II the EF never recovered (41% ± 2%-33% ± 7%). The remodeling of the venous system not only allowed restoration of myocardial function when CVBG was implemented but possibly promoted a novel form of "collateralization" between the native arterioles and the newly arterialized venules, which revascularized the ischemic myocardium. Conclusions These findings form a potential rationale for a venous arterialization-revascularization treatment for the refractory angina and the "no-option" patients using a hybrid percutaneous (closure device for arterialization)/surgical approach (CVBG) to revascularize the myocardium.
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Affiliation(s)
- Jenny S. Choy
- Department of Biomedical Engineering, California Medical Innovations Institute, San Diego, CA, United States
| | | | - Eugene M. Golts
- Division of Cardiovascular and Thoracic Surgery, University of California, San Diego, CA, United States
| | - Deepak L. Bhatt
- Icahn School of Medicine at Mount Sinai Health System, New York, NY, United States
| | - José A. Navia
- Department of Cardiac Surgery, Austral University, Pilar, Buenos Aires, Argentina
| | - Ghassan S. Kassab
- Department of Biomedical Engineering, California Medical Innovations Institute, San Diego, CA, United States
- 3DT Holdings, LLC, San Diego, CA, United States
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5
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Sehatbakhsh S, Mignatti A, Murthy S, Latib A. A novel therapy in microvascular obstruction in ST-elevation myocardial infarction: pressure-controlled intermittent coronary sinus occlusion therapy. Future Cardiol 2023; 19:615-623. [PMID: 37933690 DOI: 10.2217/fca-2023-0002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2023] Open
Abstract
Percutaneous coronary intervention has transformed the management of ST-elevation myocardial infarction (STEMI) due to a reduction in early mortality and need for repeat revascularization. However, the conventional revascularization strategy, combined with state-of-the-art anti-thrombotic and antiplatelet therapies, can still be associated with poor clinical outcome in some patients, because of reperfusion injury and microvascular obstruction contributing to the infarct size. To address this important therapeutic need, a broad-range of device-based treatments have been introduced. This is an overview of the pressure-controlled intermittent coronary sinus occlusion (PiCSO) device (Miracor Medical SA) which has been proposed for STEMI patients. PiCSO therapy could lead to an improved perfusion, decrease microvascular dysfunction, and thus potentially reduce infarct size.
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Affiliation(s)
| | - Andrea Mignatti
- Division of Cardiology, Montefiore Medical Center, New York, 10467 NY, USA
| | - Sandhya Murthy
- Division of Cardiology, Montefiore Medical Center, New York, 10467 NY, USA
| | - Azeem Latib
- Division of Cardiology, Montefiore Medical Center, New York, 10467 NY, USA
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Gibson CM, Ajmi I, von Koenig CL, Turco MA, Stone GW. Pressure-Controlled Intermittent Coronary Sinus Occlusion: A Novel Approach to Improve Microvascular Flow and Reduce Infarct Size in STEMI. CARDIOVASCULAR REVASCULARIZATION MEDICINE 2022; 45:9-14. [PMID: 35918254 DOI: 10.1016/j.carrev.2022.07.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2022] [Revised: 06/21/2022] [Accepted: 07/19/2022] [Indexed: 01/04/2023]
Abstract
Despite successful primary percutaneous coronary intervention (PCI) for treatment of ST-segment elevation myocardial infarction (STEMI), myocardial salvage is frequently suboptimal resulting in large infarctions with increased rates of heart failure and death. Microvascular dysfunction after the procedure is frequently present and contributes directly to poor outcomes in STEMI. Pressure-controlled intermittent Coronary Sinus Occlusion (PiCSO) is a novel technology designed to mitigate microvascular dysfunction in STEMI. Non-randomized studies have suggested that PiCSO use during primary PCI in STEMI is safe, improves microvascular perfusion and reduces infarct size. Randomized trials are ongoing to investigate the safety and effectiveness of PiCSO in high-risk patients with anterior STEMI undergoing primary PCI.
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Affiliation(s)
- C Michael Gibson
- Beth Israel Lahey, USA; Baim Institute for Clinical Research (FKA Harvard Clinical Research Institute), USA; Harvard Medical School, USA
| | - Issameddine Ajmi
- Helios Frankenwaldklinik Kronach, Freisener Strasse 41, 96317 Kronach, Germany
| | - Cajetan L von Koenig
- Miracor Medical SA, E40 Business Park, Rue de Bruxelles, 174, 4340 Awans, Belgium.
| | | | - Gregg W Stone
- The Zena and Michael A. Weiner Cardiovascular Institute, Icahn School of Medicine at Mount Sinai, NY, USA
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7
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Transcatheter Coronary Sinus Interventions. JACC Cardiovasc Interv 2022; 15:1397-1412. [PMID: 35863788 DOI: 10.1016/j.jcin.2022.05.039] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 05/03/2022] [Accepted: 05/05/2022] [Indexed: 12/12/2022]
Abstract
The coronary sinus has become a popular route for an increasing number of innovative transcatheter interventions to treat coronary and structural heart diseases. However, interventional cardiologists have limited experience with the cardiac venous system and its highly variable anatomy. In this paper, we review the anatomy of the cardiac veins as it relates to transcatheter interventions. We also provide a contemporary overview of the emerging coronary sinus-based transcatheter therapies and their growing literature.
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Abstract
The coronary circulation is a complex system in which vascular resistances are determined by an interplay of forces in at least three compartments: the epicardial, the microvascular, and the venous district. Cardiologists, and particularly interventional cardiologists, normallly place the focus of their attention on diseases of the epicardial coronary circulation as possible causes of coronary syndromes and neglect the importance of the other two compartments of coronary circulation. The study of the coronary microcirculation, an increasingly recognized source of ischemia, has long been disregarded, but is witnessing a revival since the (re-)introduction of diagnostic tools in the better equipped catheterization laboratories. Unfortunately, to date our understanding of coronary microvascular disease remains incomplete and the numerous proposed classifications fail to reflect its complexity. Further, no specific therapy for these disorders is available. The coronary venous circulation is an even more neglected third vascular district. Its role in regulating coronary resistances is almost completely unexplored, but inital evidence suggests that the modulation of venous pressure might help improve coronary perfusion. Coronary sinus interventions are a group of invasive techniques (both surgical and catheter-based) that are designed to treat ischaemic heart disease by increasing coronary venous pressure and therefore redistributing coronary blood flow towards the endocardium. In this review paper, we revise the role of these interventions with particular focus on acute and chronic coronary microvascular disease.
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Affiliation(s)
- T Gori
- Kardiologie 1, Zentrum für Kardiologie, Universitätsmedizin der Johannes Gutenberg-Universität Mainz, Mainz and DZHK Standort Rhein Main, Germany
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9
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Choy JS, Berwick ZC, Kalasho BD, Fu L, Bhatt DL, Navia JA, Kassab GS. Selective Autoretroperfusion Provides Substantial Cardioprotection in Swine: Incremental Improvements With Mild Hypothermia. ACTA ACUST UNITED AC 2020; 5:267-278. [PMID: 32215349 PMCID: PMC7091507 DOI: 10.1016/j.jacbts.2019.12.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Revised: 12/13/2019] [Accepted: 12/13/2019] [Indexed: 11/28/2022]
Abstract
SARP of coronary veins alone or in combination with focal MH-SARP provided cardioprotection following occlusion of the left anterior descending artery. Significant reduction in infarct size was achieved with MH-SARP and SARP with preservation of myocardial function and cell integrity. MH-SARP or SARP may provide a clinically relevant percutaneous short-term option of cardiac support to high-risk patients undergoing percutaneous coronary intervention.
Mild hypothermia (MH) and retroperfusion are 2 techniques proposed to reduce infarct size due to myocardial infarction. The authors evaluated the effects of focal MH combined with selective coronary venous autoretroperfusion (SARP) as an acute cardioprotective modality before percutaneous coronary intervention (PCI) in a swine model of left ventricular myocardial infarction. Significant reduction in infarct size with preservation of cardiac function and cardiomyocyte viability were achieved. The authors propose that SARP alone or in combination with MH may provide a clinically relevant percutaneous short-term option of cardiac support to high-risk patients undergoing PCI.
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Key Words
- AMI, acute myocardial infarction
- EF, ejection fraction
- GCV, great cardiac vein
- IABP, intra-aortic balloon pump
- LAD, left anterior descending coronary artery
- LV, left ventricle/ventricular
- MH, mild hypothermia
- PCI, percutaneous coronary intervention
- PO2, partial pressure of oxygen
- SARP, selective autoretroperfusion
- STEMI, ST-segment elevation myocardial infarction
- acute myocardial infarction
- cTnI, cardiac troponin I
- cardioprotection
- focal mild-hypothermia
- miR, microRNA
- selective autoretroperfusion
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Affiliation(s)
- Jenny S Choy
- California Medical Innovations Institute, San Diego, California
| | | | | | - Lijuan Fu
- California Medical Innovations Institute, San Diego, California
| | - Deepak L Bhatt
- Brigham and Women's Hospital Heart & Vascular Center, Harvard Medical School, Boston, Massachusetts
| | - Jose A Navia
- Department of Surgery, Austral University, Buenos Aires, Argentina
| | - Ghassan S Kassab
- California Medical Innovations Institute, San Diego, California.,3DT Holdings, San Diego, California
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11
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Nofi C, Bogatyryov Y, Dedkov EI. Preservation of Functional Microvascular Bed Is Vital for Long-Term Survival of Cardiac Myocytes Within Large Transmural Post-Myocardial Infarction Scar. J Histochem Cytochem 2017; 66:99-120. [PMID: 29116876 DOI: 10.1369/0022155417741640] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
This study was aimed to understand the mechanism of persistent cardiac myocyte (CM) survival in myocardial infarction (MI) scars. A transmural MI was induced in 12-month-old Sprague-Dawley rats by permanent coronary artery ligation. The hearts were collected 3 days, 1, 2, 4, 8, and 12 weeks after MI and evaluated with histology, immunohistochemistry, and quantitative morphometry. Vasculature patency was assessed in 4-, 8-, and 12-week-old scars by infusion of 15-micron microspheres into the left ventricle before euthanasia. The infarcted/scarred area has a small continually retained population of surviving CMs in subendocardial and subepicardial regions. Surprisingly, whereas the transverse area of subepicardial CMs remained relatively preserved or even enlarged over 12 post-MI weeks, subendocardial CMs underwent progressive atrophy. Nevertheless, the fractional volume of viable CMs remained comparable in mature scars 4, 8, and 12 weeks after MI (3.6 ± 0.4%, 3.4 ± 0.5%, and 2.5 ± 0.3%, respectively). Despite the opposite dynamics of changes in size, CMs of both regions displayed sarcomeres and gap junctions. Most importantly, surviving CMs were always accompanied by patent microvessels linked to a venous network composed of Thebesian veins, intramural sinusoids, and subepicardial veins. Our findings reveal that long-term survival of CMs in transmural post-MI scars is sustained by a local microcirculatory bed.
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Affiliation(s)
- Colleen Nofi
- Department of Biomedical Sciences, College of Osteopathic Medicine, New York Institute of Technology, Old Westbury, New York
| | - Yevgen Bogatyryov
- Department of Biomedical Sciences, College of Osteopathic Medicine, New York Institute of Technology, Old Westbury, New York
| | - Eduard I Dedkov
- Department of Biomedical Sciences, Cooper Medical School of Rowan University, Camden, New Jersey
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12
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Abstract
The heart is uniquely responsible for providing its own blood supply through the coronary circulation. Regulation of coronary blood flow is quite complex and, after over 100 years of dedicated research, is understood to be dictated through multiple mechanisms that include extravascular compressive forces (tissue pressure), coronary perfusion pressure, myogenic, local metabolic, endothelial as well as neural and hormonal influences. While each of these determinants can have profound influence over myocardial perfusion, largely through effects on end-effector ion channels, these mechanisms collectively modulate coronary vascular resistance and act to ensure that the myocardial requirements for oxygen and substrates are adequately provided by the coronary circulation. The purpose of this series of Comprehensive Physiology is to highlight current knowledge regarding the physiologic regulation of coronary blood flow, with emphasis on functional anatomy and the interplay between the physical and biological determinants of myocardial oxygen delivery. © 2017 American Physiological Society. Compr Physiol 7:321-382, 2017.
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Affiliation(s)
- Adam G Goodwill
- Department of Cellular and Integrative Physiology, Indiana University School of Medicine, Indianapolis, IN
| | - Gregory M Dick
- California Medical Innovations Institute, 872 Towne Center Drive, Pomona, CA
| | - Alexander M Kiel
- Department of Cellular and Integrative Physiology, Indiana University School of Medicine, Indianapolis, IN
- Weldon School of Biomedical Engineering, Purdue University, 206 S Martin Jischke Drive, Lafayette, IN
| | - Johnathan D Tune
- Department of Cellular and Integrative Physiology, Indiana University School of Medicine, Indianapolis, IN
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13
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Wu H, Kassab GS, Tan W, Huo Y. Flow velocity is relatively uniform in the coronary sinusal venous tree: structure-function relation. J Appl Physiol (1985) 2017; 122:60-67. [PMID: 27789767 DOI: 10.1152/japplphysiol.00295.2016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Revised: 10/06/2016] [Accepted: 10/23/2016] [Indexed: 11/22/2022] Open
Abstract
The structure and function of coronary venous vessels are different from those of coronary arteries and are much less understood despite the therapeutic significance of coronary sinus interventions. Here we aimed to perform a hemodynamic analysis in the entire coronary sinusal venous tree, which enhances the understanding of coronary venous circulation. A hemodynamic model was developed in the entire coronary sinusal venous tree reconstructed from casts and histological data of five swine hearts. Various morphometric and hemodynamic parameters were determined in each vessel and analyzed in the diameter-defined Strahler system. The findings demonstrate an area preservation between the branches of the coronary venous system that leads to relatively uniform flow velocity in different orders of the venous tree. Pressure and circumferential and wall shear stresses decreased abruptly from the smallest venules toward vessels of order -5 (80.4 ± 39.1 µm) but showed a more modest change toward the coronary sinus. The results suggest that vessels of order -5 denote a hemodynamic transition from the venular bed to the transmural subnetwork. In contrast with the coronary arterial tree, which obeys the minimum energy hypothesis, the coronary sinusal venous system complies with the area-preserving rule for efficient venous return, i.e., da Vinci's rule. The morphometric and hemodynamic model serves as a physiological reference state to test various therapeutic rationales through the venous route. NEW & NOTEWORTHY A hemodynamic model is developed in the entire coronary sinusal venous tree of the swine heart. A key finding is that the coronary sinusal venous system complies with the area preservation rule for efficient venous return while the coronary arterial tree obeys the minimum energy hypothesis. This model can also serve as a physiological reference state to test various therapeutic rationales through the venous route.
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Affiliation(s)
- Hao Wu
- Department of Mechanics and Engineering Science, College of Engineering, Peking University, Beijing, People's Republic of China.,State Key Laboratory for Turbulence and Complex Systems, College of Engineering, Peking University, Beijing, People's Republic of China
| | | | - Wenchang Tan
- Department of Mechanics and Engineering Science, College of Engineering, Peking University, Beijing, People's Republic of China; .,State Key Laboratory for Turbulence and Complex Systems, College of Engineering, Peking University, Beijing, People's Republic of China.,Shenzhen Graduate School, Peking University, Shenzhen, People's Republic of China; and
| | - Yunlong Huo
- Department of Mechanics and Engineering Science, College of Engineering, Peking University, Beijing, People's Republic of China.,State Key Laboratory for Turbulence and Complex Systems, College of Engineering, Peking University, Beijing, People's Republic of China.,College of Medicine, Hebei University, Baoding, People's Republic of China
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14
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De Maria GL, Kassimis G, Raina T, Banning AP. Reconsidering the back door approach by targeting the coronary sinus in ischaemic heart disease. Heart 2016; 102:1263-9. [DOI: 10.1136/heartjnl-2016-309642] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Accepted: 04/09/2016] [Indexed: 01/14/2023] Open
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15
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Spencer JH, Sundaram CC, Iaizzo PA. The relative anatomy of the coronary arterial and venous systems. Clin Anat 2014; 27:1023-9. [DOI: 10.1002/ca.22419] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Revised: 05/02/2014] [Accepted: 05/02/2014] [Indexed: 11/07/2022]
Affiliation(s)
- Julianne H. Spencer
- Department of Biomedical Engineering; University of Minnesota; Minneapolis Minnesota
- Medtronic, Inc.; Minneapolis Minnesota
- Institute for Engineering in Medicine; University of Minnesota; Minneapolis Minnesota
| | | | - Paul A. Iaizzo
- Department of Surgery; University of Minnesota; Minneapolis Minnesota
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16
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Yu Y, Li HT, Gao MX, Zhang F, Gu CX. Outcomes of middle cardiac vein arterialization via internal mammary/thoracic artery anastomosis. PLoS One 2013; 8:e80963. [PMID: 24278355 PMCID: PMC3835571 DOI: 10.1371/journal.pone.0080963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2013] [Accepted: 10/08/2013] [Indexed: 11/18/2022] Open
Abstract
OBJECTIVE Cardiac vein arterialization is seldom applied for treating right coronary artery disease. This study aimed to improve outcomes of cardiac vein arterialization in a porcine model using intramammary artery anastomosis. METHODS A chronic, stenotic coronary artery model was established in 12 of 14 Chinese experimental miniature pigs of either sex, which were randomly divided into equal control (n =6) and experimental (n = 6) groups. In experimental animals, blood flow was reconstructed in the right coronary artery using intramammary artery. Arterialization involved dissection of right internal mammary artery from bifurcation to apex of thorax followed by end-to-side anastomosis of internal mammary artery and middle cardiac vein plus posterior descending branch of right coronary artery. Intraoperative heart rate was maintained at 110 beats/min. Graft flow assessment and echocardiography were performed when blood pressure and heart rate normalized. RESULTS The experimental group had significantly higher mean endocardial and epicardial blood flow postoperatively than control group (mean endocardial blood flow: 0.37 vs. 0.14 ml/(g*min), p<0.001; mean epicardial blood flow: 0.29 vs. 0.22, p = 0.014). Transmural blood flow was also higher in experimental group than in control group (0.33 vs. 0.19, p<0.001); ejection fraction increased from 0.46% at baseline to 0.51% (p = 0.0038) at 6 hours postoperatively, and mean blood flow of internal mammary artery was 44.50, perfusion index 0.73 at postoperative 6 months, 43.33 and 0.80 at 3 months. CONCLUSION Successful cardiac vein arterialization via intramammary artery in a porcine model suggests that this may be a viable method for reconstructing blood flow in chronic, severe coronary artery disease.
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Affiliation(s)
- Yang Yu
- Department of Cardiac Surgery, Beijing An Zhen Hospital, Capital Medical University, Beijing, China
| | - Hai-tao Li
- Department of Cardiac Surgery, Beijing An Zhen Hospital, Capital Medical University, Beijing, China
| | - Ming-xin Gao
- Department of Cardiac Surgery, Beijing An Zhen Hospital, Capital Medical University, Beijing, China
| | - Fan Zhang
- Department of Cardiac Surgery, Beijing An Zhen Hospital, Capital Medical University, Beijing, China
| | - Cheng-xiong Gu
- Department of Cardiac Surgery, Beijing An Zhen Hospital, Capital Medical University, Beijing, China
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Khattab AA, Stieger S, Kamat PJ, Vandenberghe S, Bongoni A, Stone GW, Seiler C, Meier B, Hess OM, Rieben R. Effect of pressure-controlled intermittent coronary sinus occlusion (PICSO) on myocardial ischaemia and reperfusion in a closed-chest porcine model. EUROINTERVENTION 2013; 9:398-406. [DOI: 10.4244/eijv9i3a63] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Mlynarski R, Mlynarska A, Sosnowski M. Association between changes in coronary artery circulation and cardiac venous retention: a lesson from cardiac computed tomography. Int J Cardiovasc Imaging 2012; 29:885-90. [PMID: 23076605 PMCID: PMC3644407 DOI: 10.1007/s10554-012-0139-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2012] [Accepted: 10/08/2012] [Indexed: 02/05/2023]
Abstract
To use computed tomography (CT) image data to measure a potential association between the implantation of coronary artery bypass grafts (CABG) and changes in the coronary venous system has not yet been examined. In 112 (aged 59.4 ± 9.0; 45F) patients (pts.), a 64-slice CT angiography was performed. Patients were divided into 2 groups: CABG (56 pts.) and control (56 pts.)—without changes in coronaries. In each case, ten multi-planar reconstructions (MPR) and 3D volume rendering reconstructions using a 2 mm layer with ECG-gating, helical pitch: 12.8; rotation time: 0.4 s and average tube voltage: 135 kV at 380 mA. The visualization of the coronary veins was independently graded by 2 experts trained in CT. In the CABG group, the average number of visible coronary veins was 5.3 ± 1.3, while in the control group it was 3.1 ± 1.1 (p < 0.001). Statistical differences were also observed for the following coronary veins: posterolateral (control 2.1 ± 1.9 vs. CABG 2.9 ± 1.9; p < 0.05), lateral (control 2.2 ± 1.7 vs. CABG 3.1 ± 1.3; p < 0.01) and anterolateral (control 0.5 ± 0.9 vs. CABG 1.3 ± 1.0; p < 0.001). Implantation of CABG influences the coronary venous system. In patients after CABG, the number of identifiable coronary veins is significantly higher as compared to that in subjects without changes in coronaries. This might suggest an association between changes in coronary artery circulation and cardiac venous retention.
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Affiliation(s)
- Rafal Mlynarski
- Department of Electrocardiology, Upper-Silesian Medical Centre, ul Ziolowa 45/47, 40-635 Katowice, Poland.
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VAN DE HOEF TIMP, NOLTE FROUKJE, DELEWI RONAK, HENRIQUES JOSEP, SPAAN JOSA, TIJSSEN JANG, SIEBES MARIA, WYKRZYKOWSKA JOANNAJ, STONE GREGGW, PIEK JANJ. Intracoronary Hemodynamic Effects of Pressure-Controlled Intermittent Coronary Sinus Occlusion (PICSO): Results from the First-In-Man Prepare PICSO Study. J Interv Cardiol 2012; 25:549-56. [DOI: 10.1111/j.1540-8183.2012.00768.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Zhao Y, Gu TX, Zhang GW, Shi EY, Yu L, Wang C. Endothelial factors after selective retrograde coronary venous bypass under different pressures. SCAND CARDIOVASC J 2011; 45:369-73. [PMID: 22070402 DOI: 10.3109/14017431.2011.616219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND Selective retrograde coronary venous bypass (SRCVB) may be a promising treatment for patients with advanced coronary artery disease (CAD). The aim of this study is to investigate the effect of SRCVB on plasma endothelial factor levels in dog myocardial ischemic model, and explore the possible mechanisms. METHODS 24 crossbreed dogs were randomly divided into three groups: (1) control group; (2) SRCVB group with 60 mmHg perfusion pressure; (3) SRCVB group with 90 mmHg perfusion pressure. The posterior descending coronary artery (PDA) was ligated in all groups, and SRCVB was performed in the last two groups. The levels of plasma nitric oxide (NO) and endothelin (ET) at different time points were determined in each group. In SRCVB groups, ink and imaging agent were injected to the heart through SVG graft for assessment of vein perfusion. RESULTS At the acute period, there were significant increase in the plasma levels of NO and decrease in ET in SRCVB 90 mmHg group compared with the control (P < 0. 01), and a further improvement were found in SRCVB 60 mmHg group (P < 0. 01). The ink or imaging agent was found in the myocardial tissue and flowed back to right atrium through contralateral coronary vein. CONCLUSIONS SRCVB with low level of perfusion pressure could provide effective perfusion for ischemic myocardium and alleviate the myocardial endothelial cell injury. It may be a new therapeutic strategy for severe CAD.
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Affiliation(s)
- Ye Zhao
- Department of Cardiac Surgery, The First Affiliated Hospital of China Medical University, Shenyang, China
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Choy JS, Svendsen M, Lu X, Zheng H, Sulkin MS, Sinha AK, Morales C, Moussa I, Navia JA, Kassab GS. Selective autoretroperfusion preserves myocardial function during coronary artery ligation in swine. ACUTE CARDIAC CARE 2011; 13:99-108. [PMID: 21539459 DOI: 10.3109/17482941.2011.578748] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND External pumps have been previously used to minimize edema and hemorrhage caused by coronary retroperfusion. The objective of this study was to use a pump-less approach (selective autoretroperfusion, SARP) to preserve myocardial function after acute coronary artery ligation. METHODS In five experimental pigs, the LAD artery was ligated distal to the first diagonal and retroperfusion was instituted for three hours from a brachiocephalic artery at 50 mmHg pressure through an adjustable occluder on the cannula. In eight control pigs, the LAD artery was ligated distal to the second diagonal for the same duration with no SARP. RESULTS ECG showed more prominent S-T segment elevation in the untreated control group despite the more distal ligation. The degree of myocardial contraction was significantly attenuated in the control group but was largely preserved in the SARP treated group. The myocytes were well preserved in the SARP group with no rupture of venous microvessels. Myocyte edema and disruption was observed in the control group with only mild extracellular edema in the SARP treated group. CONCLUSION SARP preserved myocardial function with no damage to the myocyte and venules during three hours of acute LAD ligation.
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Affiliation(s)
- Jenny S Choy
- Department of Biomedical Engineering, Indiana University Purdue University Indianapolis, USA
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Kaimovitz B, Lanir Y, Kassab GS. A full 3-D reconstruction of the entire porcine coronary vasculature. Am J Physiol Heart Circ Physiol 2010; 299:H1064-76. [PMID: 20622105 PMCID: PMC2957345 DOI: 10.1152/ajpheart.00151.2010] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2010] [Accepted: 07/08/2010] [Indexed: 11/22/2022]
Abstract
We have previously reconstructed the entire coronary arterial tree of the porcine heart down to the first segment of capillaries. Here, we extend the vascular model through the capillary bed and the entire coronary venous system. The reconstruction was based on comprehensive morphometric data previously measured in the porcine heart. The reconstruction was formulated as a large-scale optimization process, subject to both global constraints relating to the location of the larger veins and to local constraints of measured morphological features. The venous network was partitioned into epicardial, transmural, and perfusion functional subnetworks. The epicardial portion was generated by a simulated annealing search for the optimal coverage of the area perfused by the arterial epicardial vessels. The epicardial subnetwork and coronary arterial capillary network served as boundary conditions for the reconstruction of the in-between transmural and perfusion networks, which were generated to optimize vascular homogeneity. Five sets of full coronary trees, which spanned the entire network down to the capillary level, were reconstructed. The total number of reconstructed venous segments was 17,148,946 ± 1,049,498 (n = 5), which spanned the coronary sinus (order -12) to the first segment of the venous capillary (order 0v). Combined with the reconstructed arterial network, the number of vessel segments for the entire coronary network added up to 27,307,376 ± 1,155,359 (n = 5). The reconstructed full coronary vascular network agreed with the gross anatomy of coronary networks in terms of structure, location of major vessels, and measured morphometric statistics of native coronary networks. This is the first full model of the entire coronary vasculature, which can serve as a foundation for realistic large-scale coronary flow analysis.
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Affiliation(s)
- Benjamin Kaimovitz
- Faculty of Biomedical Engineering, Israel Institute of Technology, Haifa, Israel
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Acute subepicardial infarction associated with severe septic shock--insight in myocardial perfusion. Pathol Res Pract 2009; 206:401-4. [PMID: 19945802 DOI: 10.1016/j.prp.2009.11.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2009] [Revised: 10/08/2009] [Accepted: 11/02/2009] [Indexed: 11/23/2022]
Abstract
Isolated infarctions of the subepicardial myocardium without changes in subendocardium are extremely rare. We present an autoptic case with an acute subepicardial infarction of the right- and left-ventricular myocardium. A 53-year-old male was admitted to hospital with acute upper abdominal pain. Clinical examination revealed an acute infero-lateral myocardial infarction. The patient succumbed to acute heart failure a few hours later. Autopsy revealed numerous pulmonary abscesses due to suppurative lobular pneumonia with consecutive pericardial effusion. Furthermore, we diagnosed an acute myocardial infarct encompassing the entire right and left ventricles but limited to the subepicardial myocardium only. Microscopically, we observed fibrin microemboli in the subepicardial microvessels. The existence of an isolated subepicardial myocardial infarct challenges our understanding of myocardial perfusion.
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