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Mazimba S, Jeukeng C, Ondigi O, Mwansa H, Johnson AE, Elumogo C, Breathett K, Kwon Y, Mubanga M, Mwansa V, Baldeo C, Ibrahim S, Selinski C, Mehta N, Bilchick K. Coronary perfusion pressure is associated with adverse outcomes in advanced heart failure. Perfusion 2023; 38:1492-1500. [PMID: 35947883 DOI: 10.1177/02676591221118693] [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: 11/15/2022]
Abstract
BACKGROUND Myocardial perfusion is an important determinant of cardiac function. We hypothesized that low coronary perfusion pressure (CPP) would be associated with adverse outcomes in heart failure. Myocardial perfusion impacts the contractile efficiency thus a low CPP would signal low myocardial perfusion in the face of increased cardiac demand as a result of volume overload. METHODS We analyzed patients with complete hemodynamic data in the Evaluation Study of Congestive Heart Failure and Pulmonary Artery Catheterization Effectiveness trial using Cox Proportional Hazards regression for the primary outcome of the composite risk of death, heart transplantation, or left ventricular assist device [(LVAD). DT × LVAD] and the secondary outcome of the composite risk of DT × LVAD and heart failure hospitalization (DT × LVADHF). CPP was calculated as the difference between diastolic blood pressure and pulmonary artery wedge pressure. Heart failure categories (ischemic vs non-ischemic) were also stratified based on CPP strata. RESULTS The 158 patients (56.7 ± 13.6 years, 28.5% female) studied had a median CPP of 40 mmHg (IQR 35-52 mmHg). During 6 months of follow-up, 35 (22.2%) had the composite primary outcome and 109 (69.0%) had the composite secondary outcome. When these outcomes were then stratified based on the median, CPP was associated with these outcomes. Increasing CPP was associated with lower risk of both the primary outcome of DT × LVAD (HR 0.96, 95% CI 0.94-0.99 p = .002) and as well as the secondary outcome of DT × LVADHF (p = .0008) There was significant interaction between CPP and ischemic etiology (p = .04). CONCLUSION A low coronary artery perfusion pressure below (median) 40mmHg in patients with advanced heart failure undergoing invasive hemodynamic monitoring with a pulmonary artery catheter was associated with adverse outcomes. CPP could useful in guiding risk stratification of advanced heart failure patients and timely evaluation of advanced heart failure therapies.
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Affiliation(s)
- Sula Mazimba
- University of Virginia Health System, Charlottesville, VA, USA
| | | | - Olivia Ondigi
- University of Virginia Health System, Charlottesville, VA, USA
| | | | | | - Comfort Elumogo
- University of Virginia Health System, Charlottesville, VA, USA
| | | | | | | | | | - Cherisse Baldeo
- University of Virginia Health System, Charlottesville, VA, USA
| | - Sami Ibrahim
- University of Virginia Health System, Charlottesville, VA, USA
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Mazimba S, Mwansa H, Breathett K, Strickling JE, Shah K, McNamara C, Mehta N, Kwon Y, Lamp J, Feng L, Tallaj J, Pamboukian S, Mubanga M, Matharoo J, Lim S, Salerno M, Mwansa V, Bilchick KC. Systemic arterial pulsatility index (SAPi) predicts adverse outcomes in advanced heart failure patients. Heart Vessels 2022; 37:1719-1727. [PMID: 35534640 DOI: 10.1007/s00380-022-02070-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Accepted: 03/31/2022] [Indexed: 11/30/2022]
Abstract
Ventriculo-arterial (VA) coupling has been shown to have physiologic importance in heart failure (HF). We hypothesized that the systemic arterial pulsatility index (SAPi), a measure that integrates pulse pressure and a proxy for left ventricular end-diastolic pressure, would be associated with adverse outcomes in advanced HF. We evaluated the SAPi ([systemic systolic blood pressure-systemic diastolic blood pressure]/pulmonary artery wedge pressure) obtained from the final hemodynamic measurement in patients randomized to therapy guided by a pulmonary arterial catheter (PAC) and with complete data in the Evaluation Study of Congestive Heart Failure and Pulmonary Artery Catheterization Effectiveness (ESCAPE) trial. Cox proportional hazards regression was performed for the outcomes of (a) death, transplant, left ventricular assist device (DTxLVAD) or hospitalization, (DTxLVADHF) and (b) DTxLVAD. Among 142 patients (mean age 56.8 ± 13.3 years, 30.3% female), the median SAPi was 2.57 (IQR 1.63-3.45). Increasing SAPi was associated with significant reductions in DTxLVAD (HR 0.60 per unit increase in SAPi, 95% CI 0.44-0.84) and DTxLVADHF (HR 0.81 per unit increase, 95% CI 0.70-0.95). Patients with a SAPi ≤ 2.57 had a marked increase in both outcomes, including more than twice the risk of DTxLVAD (HR 2.19, 95% CI 1.11-4.30) over 6 months. Among advanced heart failure patients with invasive hemodynamic monitoring in the ESCAPE trial, SAPi was strongly associated with adverse clinical outcomes. These findings support further investigation of the SAPi to guide treatment and prognosis in HF undergoing invasive hemodynamic monitoring.
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Affiliation(s)
- Sula Mazimba
- Division of Cardiovascular Medicine, University of Virginia Health System, 1215 Lee St., PO Box 800158, Charlottesville, VA, 22908-0158, USA.
| | - Hunter Mwansa
- Division of Internal Medicine, University of Illinois College of Medicine, Peoria, IL, USA
| | - Khadijah Breathett
- Division of Cardiovascular Medicine, Indiana University, Indianapolis, IN, USA
| | - Jarred E Strickling
- Division of Cardiovascular Medicine, University of Virginia Health System, 1215 Lee St., PO Box 800158, Charlottesville, VA, 22908-0158, USA
| | - Kajal Shah
- Division of Cardiovascular Medicine, University of Virginia Health System, 1215 Lee St., PO Box 800158, Charlottesville, VA, 22908-0158, USA
| | - Coleen McNamara
- Division of Cardiovascular Medicine, University of Virginia Health System, 1215 Lee St., PO Box 800158, Charlottesville, VA, 22908-0158, USA
| | - Nishaki Mehta
- Division of Cardiovascular Medicine, University of Virginia Health System, 1215 Lee St., PO Box 800158, Charlottesville, VA, 22908-0158, USA
| | - Younghoon Kwon
- Division of Cardiovascular Medicine, University of Washington Medical Center, Seattle, WA, USA
| | - Josephine Lamp
- Division of Cardiovascular Medicine, University of Virginia Health System, 1215 Lee St., PO Box 800158, Charlottesville, VA, 22908-0158, USA
| | - Lu Feng
- Division of Cardiovascular Medicine, University of Virginia Health System, 1215 Lee St., PO Box 800158, Charlottesville, VA, 22908-0158, USA
| | - Jose Tallaj
- Division of Cardiovascular Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Salpy Pamboukian
- Division of Cardiovascular Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Mwenya Mubanga
- Department of Medical Epidemiology and Biostatistics, Karolinska Institute, Solna, Stockholm, Sweden
| | - Jashanjeet Matharoo
- Division of Cardiovascular Medicine, University of Virginia Health System, 1215 Lee St., PO Box 800158, Charlottesville, VA, 22908-0158, USA
| | - Scott Lim
- Division of Cardiovascular Medicine, University of Virginia Health System, 1215 Lee St., PO Box 800158, Charlottesville, VA, 22908-0158, USA
| | - Michael Salerno
- Division of Cardiovascular Medicine, University of Virginia Health System, 1215 Lee St., PO Box 800158, Charlottesville, VA, 22908-0158, USA
| | - Victor Mwansa
- Division of Cardiology, Heartland Regional Medical Group, Marion, IL, USA
| | - Kenneth C Bilchick
- Division of Cardiovascular Medicine, University of Virginia Health System, 1215 Lee St., PO Box 800158, Charlottesville, VA, 22908-0158, USA
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Iwano H, Yokoyama S, Kamiya K, Nagai T, Tsujinaga S, Sarashina M, Ishizaka S, Chiba Y, Nakabachi M, Nishino H, Murayama M, Okada K, Kaga S, Anzai T. Significance and prognostic impact of v wave on pulmonary artery pressure in patients with heart failure: beyond the wedge pressure. Heart Vessels 2020; 35:1079-1086. [DOI: 10.1007/s00380-020-01580-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Accepted: 02/28/2020] [Indexed: 01/28/2023]
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Ho WH, Tshimanga IJ, Ngoepe MN, Jermy MC, Geoghegan PH. Evaluation of a Desktop 3D Printed Rigid Refractive-Indexed-Matched Flow Phantom for PIV Measurements on Cerebral Aneurysms. Cardiovasc Eng Technol 2019; 11:14-23. [PMID: 31820351 PMCID: PMC7002330 DOI: 10.1007/s13239-019-00444-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Accepted: 11/20/2019] [Indexed: 12/24/2022]
Abstract
PURPOSE Fabrication of a suitable flow model or phantom is critical to the study of biomedical fluid dynamics using optical flow visualization and measurement methods. The main difficulties arise from the optical properties of the model material, accuracy of the geometry and ease of fabrication. METHODS Conventionally an investment casting method has been used, but recently advancements in additive manufacturing techniques such as 3D printing have allowed the flow model to be printed directly with minimal post-processing steps. This study presents results of an investigation into the feasibility of fabrication of such models suitable for particle image velocimetry (PIV) using a common 3D printing Stereolithography process and photopolymer resin. RESULTS An idealised geometry of a cerebral aneurysm was printed to demonstrate its applicability for PIV experimentation. The material was shown to have a refractive index of 1.51, which can be refractive matched with a mixture of de-ionised water with ammonium thiocyanate (NH4SCN). The images were of a quality that after applying common PIV pre-processing techniques and a PIV cross-correlation algorithm, the results produced were consistent within the aneurysm when compared to previous studies. CONCLUSIONS This study presents an alternative low-cost option for 3D printing of a flow phantom suitable for flow visualization simulations. The use of 3D printed flow phantoms reduces the complexity, time and effort required compared to conventional investment casting methods by removing the necessity of a multi-part process required with investment casting techniques.
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Affiliation(s)
- W H Ho
- Department of Mechanical and Industrial Engineering, University of South Africa, Johannesburg, South Africa.,School of Mechanical Aerospace and Industrial Engineering, University of the Witwatersrand, Johannesburg, South Africa
| | - I J Tshimanga
- Department of Mechanical and Industrial Engineering, University of South Africa, Johannesburg, South Africa
| | - M N Ngoepe
- Department of Mechanical Engineering, University of Cape Town, Cape Town, South Africa
| | - M C Jermy
- Department of Mechanical Engineering, University of Canterbury, Christchurch, New Zealand
| | - P H Geoghegan
- Department of Mechanical and Industrial Engineering, University of South Africa, Johannesburg, South Africa. .,Biomedical Engineering, School of Life and Health Sciences, Aston University, Birmingham, England.
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Yazdi SG, Geoghegan PH, Docherty PD, Jermy M, Khanafer A. A Review of Arterial Phantom Fabrication Methods for Flow Measurement Using PIV Techniques. Ann Biomed Eng 2018; 46:1697-1721. [DOI: 10.1007/s10439-018-2085-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Accepted: 06/25/2018] [Indexed: 12/21/2022]
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Silber D, Lachmann J. Invasive Hemodynamics of Pulmonary Disease and the Right Ventricle. Interv Cardiol Clin 2017; 6:329-343. [PMID: 28600088 DOI: 10.1016/j.iccl.2017.03.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Pulmonary hypertension (PH) falls into 5 groups, as defined by the World Health Organization. Swan-Ganz catheters determine precapillary versus postcapillary PH. The hemodynamic values of PH at rest and with vasodilatory challenge categorize the etiology of PH and guide treatment. RV maladaptations to increased pulmonary vascular resistance (PVR) and the chronicity of the right ventricle's (RV) response to increased PH and/or increased PVR can be understood with pressure-volume (PV) loops constructed with use of conductance catheters. These PV loops demonstrate the RV's ability to increase stroke volume in acutely and chronically increased PVR.
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Affiliation(s)
- David Silber
- Winthrop Cardiology Associates, PC, NYU-Winthrop Hospital, 212 Jericho Turnpike, Mineola, NY 11501, USA.
| | - Justine Lachmann
- Winthrop Cardiology Associates, PC, NYU-Winthrop Hospital, 212 Jericho Turnpike, Mineola, NY 11501, USA
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Evaluation of cardiac function index as measured by transpulmonary thermodilution as an indicator of left ventricular ejection fraction in cardiogenic shock. BIOMED RESEARCH INTERNATIONAL 2014; 2014:598029. [PMID: 25013790 PMCID: PMC4071812 DOI: 10.1155/2014/598029] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Revised: 05/07/2014] [Accepted: 05/19/2014] [Indexed: 01/28/2023]
Abstract
Introduction. The PiCCO transpulmonary thermodilution technique provides two indices of cardiac systolic function, the cardiac function index (CFI) and the global ejection fraction (GEF). Both appear to be correlated with left ventricular ejection fraction (LVEF) measured by echocardiography in patients with circulatory failure, especially in septic shock. The aim of the present study was to test the reliability of CFI as an indicator of LVEF in patients with cardiogenic shock. Methods. In thirty-five patients with cardiogenic shock, we performed (i) simultaneous measurements of echocardiography LVEF and cardiac function index assessed by transpulmonary thermodilution (n = 72) and (ii) transpulmonary thermodilution before/after increasing inotropic agents (n = 18). Results. Mean LVEF was 31% (+/−11.7), CFI 3/min (+/−1), and GEF 14.2% (+/−6). CFI and GEF were both positively correlated with LVEF (P < 0.0001, r2 = 0.27). CFI and GEF were significantly increased with inotropic infusion (resp., P = 0.005, P = 0.007). A cardiac function index <3.47/min predicted a left ventricular ejection fraction ≤35% (sensitivity 81.1% and specificity 63%). In patients with right ventricular dysfunction, CFI was not correlated with LVEF. Conclusion. CFI is correlated with LVEF provided that patient does not present severe right ventricular dysfunction. Thus, the PiCCO transpulmonary thermodilution technique is useful for the monitoring of inotropic therapy during cardiogenic shock.
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Mangini S, Pires PV, Braga FGM, Bacal F. Decompensated heart failure. EINSTEIN-SAO PAULO 2014; 11:383-91. [PMID: 24136770 PMCID: PMC4878602 DOI: 10.1590/s1679-45082013000300022] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2013] [Accepted: 08/13/2013] [Indexed: 12/20/2022] Open
Abstract
Heart failure is a disease with high incidence and prevalence in the population. The costs with hospitalization for decompensated heart failure reach approximately 60% of the total cost with heart failure treatment, and mortality during hospitalization varies according to the studied population, and could achieve values of 10%. In patients with decompensated heart failure, history and physical examination are of great value for the diagnosis of the syndrome, and also can help the physician to identify the beginning of symptoms, and give information about etiology, causes and prognosis of the disease. The initial objective of decompensated heart failure treatment is the hemodynamic and symptomatic improvement preservation and/or improvement of renal function, prevention of myocardial damage, modulation of the neurohormonal and/or inflammatory activation and control of comorbidities that can cause or contribute to progression of the syndrome. According to the clinical-hemodynamic profile, it is possible to establish a rational for the treatment of decompensated heart failure, individualizing the proceedings to be held, leading to reduction in the period of hospitalization and consequently reducing overall mortality.
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Standards for the use of cardiopulmonary exercise testing for the functional evaluation of cardiac patients: a report from the Exercise Physiology Section of the European Association for Cardiovascular Prevention and Rehabilitation. ACTA ACUST UNITED AC 2009; 16:249-67. [PMID: 19440156 DOI: 10.1097/hjr.0b013e32832914c8] [Citation(s) in RCA: 250] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Cardiopulmonary exercise testing (CPET) is a methodology that has profoundly affected the approach to patients' functional evaluation, linking performance and physiological parameters to the underlying metabolic substratum and providing highly reproducible exercise capacity descriptors. This study provides professionals with an up-to-date review of the rationale sustaining the use of CPET for functional evaluation of cardiac patients in both the clinical and research settings, describing parameters obtainable either from ramp incremental or step constant-power CPET and illustrating the wealth of information obtainable through an experienced use of this powerful tool. The choice of parameters to be measured will depend on the specific goals of functional evaluation in the individual patient, namely, exercise tolerance assessment, training prescription, treatment efficacy evaluation, and/or investigation of exercise-induced adaptations of the oxygen transport/utilization system. The full potentialities of CPET in the clinical and research setting still remain largely underused and strong efforts are recommended to promote a more widespread use of CPET in the functional evaluation of cardiac patients.
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Abstract
Critical care medicine is a young specialty and since its inception has been heavily reliant upon technology. Invasive monitoring has its humble beginnings in the continuous monitoring of heart rate and rhythm. From the development of right heart catheterization to the adaption of the echocardiogram for use in shock, intensivists have used technology to monitor hemodynamics. The care of the critically ill has been buoyed by investigators who sought to offer renal replacement therapy to unstable patients and worked to improve the monitoring of oxygen saturation. The evolution of mechanical ventilation for the critically ill embodies innumerable technological advances. More recently, critical care has insisted upon rigorous testing and cost-benefit analysis of technological advances.
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Affiliation(s)
- Nitin Puri
- Division of Critical Care Medicine, Department of Medicine, Cooper University Hospital, 3 Cooper Ave., Camden, NJ 08103, USA.
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