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Index of myocardial resistance

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https://www.readbyqxmd.com/read/28218606/microvascular-dysfunction-following-st-elevation-myocardial-infarction-and-its-recovery-over-time-is-associated-with-short-and-long-term-cardiac-function
#1
Mariëlla E C J Hassell, Matthijs Bax, Martijn A van Lavieren, Robin Nijveldt, Alexander Hirsch, Lourens Robbers, Koen M Marques, Jan G P Tijssen, Felix Zijlstra, Albert C van Rossum, Ronak Delewi, Jan J Piek
AIMS: It is unclear whether microvascular dysfunction following ST-elevation myocardial infarction (STEMI) is prognostic for long-term left ventricular function (LVF). and whether recovery of the microvasculature status is associated with LVF improvement. METHODS AND RESULTS: In 62 patients, Coronary Flow Reserve (CFR) and Hyperemic Microvascular Resistance Index (HMRI) in the infarct related artery (IRA) was assessed by intracoronary Doppler flow measurements within 1 week and at 4 months...
February 21, 2017: EuroIntervention
https://www.readbyqxmd.com/read/28215234/moderate-to-severe-obstructive-sleep-apnea-is-associated-with-subclinical-myocardial-injury-and-impaired-hemodynamics-in-pulmonary-hypertension-patients
#2
Takashi Kohno, Masaharu Kataoka, Takashi Kawakami, Ryoma Fukuoka, Yuichi Tamura, Mai Kimura, Makoto Takei, Yuichiro Maekawa, Motoaki Sano, Keiichi Fukuda
BACKGROUND: The clinical significance of obstructive sleep apnea (OSA) in pulmonary hypertension (PH) patients remains unclear. We investigated the hemodynamics and serum troponin T concentrations associated with OSA in PH patients. METHODS: Cross-sectional study was performed on data from 97 clinically stable PH patients. Using overnight sleep study, we evaluated apnea-hypopnea index (AHI) and divided patients into two groups: none-to-mild OSA (AHI < 15/h, N = 81) and moderate-to-severe OSA (AHI ≥ 15/h, N = 16)...
February 2017: Sleep Medicine
https://www.readbyqxmd.com/read/28185529/elevated-levels-of-adipokines-predict-outcome-after-acute-myocardial-infarction-a-long-term-follow-up-of-the-glucose-tolerance-in-patients-with-acute-myocardial-infarction-cohort
#3
Viveca Ritsinger, Kerstin Brismar, Klas Malmberg, Linda Mellbin, Per Näsman, Lars Rydén, Stefan Söderberg, Åke Tenerz, Anna Norhammar
OBJECTIVE: Adiponectin and leptin are associated with insulin resistance and cardiovascular disease. Information on the prognostic value after an acute myocardial infarction is still conflicting. METHODS: Patients (n = 180) without known diabetes and with admission glucose of <11 mmol/L admitted for an acute myocardial infarction in 1998-2000 were followed for mortality and cardiovascular events (first of cardiovascular mortality/acute myocardial infarction/stroke/heart failure) until the end of 2011 (median: 11...
March 2017: Diabetes & Vascular Disease Research
https://www.readbyqxmd.com/read/28164013/stenotic-flow-reserve-derived-from-quantitative-coronary-angiography-has-modest-but-incremental-value-in-predicting-functionally-significant-coronary-stenosis-as-evaluated-by-fractional-flow-reserve
#4
Elizabeth L Potter, Colin Machado, Yuvaraj Malaiapan, Om Narayan, Brian S H Ko, Peter J Psaltis, Kiran Munnur, James D Cameron, Ian T Meredith, Dennis Thiam Leong Wong
BACKGROUND: Stenotic flow reserve (SFR) derived from quantitative coronary angiography (QCA) has been correlated with myocardial ischaemia as determined by pharmacological stress echocardiography. However, the diagnostic accuracy of SFR in predicting functionally significant coronary stenosis as assessed by the gold standard, fractional flow reserve (FFR), has not been previously characterised. METHODS: Patients who underwent coronary angiography and FFR assessment between January 2010 and February 2012 in a single tertiary centre were retrospectively assessed...
February 2017: Cardiovascular Diagnosis and Therapy
https://www.readbyqxmd.com/read/28149843/gamma-glutamyl-transferase-and-cardiovascular-disease
#5
REVIEW
Gjin Ndrepepa, Adnan Kastrati
Gamma-glutamyl transferase (GGT) is an enzyme located on the external surface of cellular membranes. GGT contributes in maintaining the physiological concentrations of cytoplasmic glutathione and cellular defense against oxidative stress via cleavage of extracellular glutathione and increased availability of amino acids for its intracellular synthesis. Increased GGT activity is a marker of antioxidant inadequacy and increased oxidative stress. Ample evidence suggests that elevated GGT activity is associated with increased risk of cardiovascular disease (CVD) such as coronary heart disease (CHD), stroke, arterial hypertension, heart failure, cardiac arrhythmias and all-cause and CVD-related mortality...
December 2016: Annals of Translational Medicine
https://www.readbyqxmd.com/read/28113071/assessment-of-fetal-myocardial-performance-in-severe-early-onset-pre-eclampsia-eo-pet-with-and-without-intrauterine-growth-restriction-across-deteriorating-stages-of-placental-vascular-resistance-and-links-to-adverse-outcomes
#6
I E Bhorat, J S Bagratee, T Reddy
OBJECTIVE: To determine whether fetuses in severe early onset pre-eclampsia (EO-PET) with or without intrauterine growth restriction has cardiac dysfunction across deteriorating stages of placental vascular resistance and whether this dysfunction influences perinatal outcome. STUDY DESIGN: This was a prospective cross-sectional study performed in a tertiary care university medical centre. Sixty pregnant patients with severe early-onset pre-eclampsia between 27 and 32 weeks were recruited and matched with 60 patients having normal pregnancies...
January 16, 2017: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/28096045/early-detection-of-left-ventricular-dysfunction-in-first-degree-relatives-of-diabetic-patients-by-myocardial-deformation-imaging-the-role-of-endothelial-glycocalyx-damage
#7
Ignatios Ikonomidis, George Pavlidis, Vaia Lambadiari, Fotini Kousathana, Maria Varoudi, Filio Spanoudi, Eirini Maratou, John Parissis, Helen Triantafyllidi, George Dimitriadis, John Lekakis
BACKGROUND: First-degree relatives of type-2 diabetes patients (FDR) present insulin resistance. We investigated whether FDR and dysglycaemic subjects demonstrate abnormal endothelial glycocalyx and LV deformation during postprandial hyperglycemia. METHODS: We studied 40 FDR with normal oral glucose test (OGTT), 40 subjects with abnormal OGTT (dysglycaemic) and 20 subjects with normal OGTT without parental history of diabetes (normoglycaemic). At 0 and 120min of OGTT we measured: a) LV longitudinal strain (LS) of subendocardial, mid-myocardial and subepicardial layers, global LS (GLS), peak twisting (pTw), untwisting velocity (pUtwVel), by speckle tracking echocardiography b) perfused boundary region (PBR) of the sublingual arterial microvessels; high PBR values represent reduced glycocalyx thickness...
January 8, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28063459/cardiac-remodeling-following-reperfused-acute-myocardial-infarction-is-linked-to-the-concomitant-evolution-of-vascular-function-as-assessed-by-cardiovascular-magnetic-resonance
#8
Olivier Huttin, Damien Mandry, Romain Eschalier, Lin Zhang, Emilien Micard, Freddy Odille, Marine Beaumont, Renaud Fay, Jacques Felblinger, Edoardo Camenzind, Faïez Zannad, Nicolas Girerd, Pierre Y Marie
BACKGROUND: Left ventricular (LV) remodeling following acute myocardial infarction (MI) is difficult to predict at an individual level although a possible interfering role of vascular function has yet to be considered to date. This study aimed to determine the extent to which this LV remodeling is influenced by the concomitant evolution of vascular function and LV loading conditions, as assessed by phase-contrast Cardiovascular Magnetic Resonance (CMR) of the ascending aorta. METHODS: CMR was performed in 121 patients, 2-4 days after reperfusion of a first ST-segment elevation myocardial infarction and 6 months thereafter...
January 4, 2017: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/28036029/fenofibrate-therapy-restores-antioxidant-protection-and-improves-myocardial-insulin-resistance-in-a-rat-model-of-metabolic-syndrome-and-myocardial-ischemia-the-role-of-angiotensin-ii
#9
Luz Ibarra-Lara, María Sánchez-Aguilar, Alicia Sánchez-Mendoza, Leonardo Del Valle-Mondragón, Elizabeth Soria-Castro, Elizabeth Carreón-Torres, Eulises Díaz-Díaz, Héctor Vázquez-Meza, Verónica Guarner-Lans, María Esther Rubio-Ruiz
Renin-angiotensin system (RAS) activation promotes oxidative stress which increases the risk of cardiac dysfunction in metabolic syndrome (MetS) and favors local insulin resistance. Fibrates regulate RAS improving MetS, type-2 diabetes and cardiovascular diseases. We studied the effect of fenofibrate treatment on the myocardic signaling pathway of Angiotensin II (Ang II)/Angiotensin II type 1 receptor (AT1) and its relationship with oxidative stress and myocardial insulin resistance in MetS rats under heart ischemia...
December 28, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28032631/effect-of-diabetes-and-metabolic-syndrome-on-myocardial-mechano-energetic-efficiency-in-hypertensive-patients-the-campania-salute-network
#10
C Mancusi, M A Losi, R Izzo, G Canciello, M V Manzi, A Sforza, N De Luca, B Trimarco, G de Simone
Reduced myocardial mechano-energetic efficiency (MEE), estimated as stroke volume/heart rate ratio per g of left ventricular (LV) mass (LVM), and expressed in μl s(-1) g(-1) (MEEi), is a strong predictor of cardiovascular (CV) events, independently of LV hypertrophy and other confounders, including type II diabetes (DM). Decreased MEEi is more frequent in patients with diabetes. In the present analysis we evaluated the interrelation among MEEi, DM and metabolic syndrome (MetS) in the setting of arterial hypertension...
December 29, 2016: Journal of Human Hypertension
https://www.readbyqxmd.com/read/27926579/the-influence-of-coronary-plaque-morphology-assessed-by-optical-coherence-tomography-on-final-microvascular-function-after-stenting-in-patients-with-st-elevation-myocardial-infarction
#11
Giovanni L De Maria, Niket Patel, Mathias Wolfrum, Gregor Fahrni, George Kassimis, Italo Porto, Sam Dawkins, Robin P Choudhury, John C Forfar, Bernard D Prendergast, Keith M Channon, Rajesh K Kharbanda, Hector M Garcia-Garcia, Adrian P Banning
OBJECTIVES: The index of microcirculatory resistance (IMR) provides a reproducible assessment of the status of coronary microvasculature in patients with ST-elevation myocardial infarction (STEMI). Frequency-domain optical coherence tomography (FD-OCT) enables detailed assessment of the morphology of coronary plaque.We sought to determine the influence of the initial culprit coronary plaque anatomy within the infarct-related artery on IMR after stenting in STEMI. PATIENTS AND METHODS: In 25 STEMI patients IMR was measured immediately before and after stent implantation...
December 6, 2016: Coronary Artery Disease
https://www.readbyqxmd.com/read/27898505/clinical-role-of-post-angioplasty-hyperemic-microvascular-resistances-in-chronic-ischemic-left-ventricular-dysfunction
#12
Riccardo Gorla, Edoardo Verna, Simone Scotti, Sergio Ghiringhelli, Laura Zoli, Stefano Provasoli, Silvana Garancini, Roberto De Ponti, Jorge A Salerno-Uriarte
AIMS: To investigate the impact of hyperemic microvascular resistances (HMRs) on myocardial perfusion and contractility after percutaneous coronary intervention (PCI) in chronic ischemic left ventricular dysfunction (CILVD). METHODS: The current retrospective study included 48 patients with CILVD of the left anterior descending territory undergoing HMRs assessment before and after PCI with a dual-sensor intracoronary pressure-flow wire. The severity of resting myocardial underperfusion and contractile dysfunction of the left anterior descending territory was scored as summed rest score (SRS-T) by single photon emission tomography, wall motion score index (WMSI-T) and left ventricular ejection fraction (LVEF) by transthoracic echocardiography before PCI and after 3 months...
November 24, 2016: Journal of Cardiovascular Medicine
https://www.readbyqxmd.com/read/27878627/right-ventricular-dysfunction-as-an-echocardiographic-measure-of-acute-rejection-following-heart-transplantation-in-children
#13
Sanjeev Aggarwal, Jennifer Blake, Swati Sehgal
Noninvasive biomarkers of acute allograft rejection (AAR) following orthotopic heart transplantation (OHT) are needed. The aim of this study was to investigate the accuracy of echocardiographic (ECHO) right ventricular (RV) global functional and resistance indices in the detection of AAR. This retrospective chart review included children with biopsy-proven AAR (grade ≥ 2R cellular or CD4 + antibody-mediated rejection) following OHT and an ECHO within 12 h of the biopsy. ECHO measures: (a) ratio of systolic to diastolic duration (S/D), (b) RV myocardial performance index (MPI) and (c) tricuspid regurgitant gradient to RV outflow tract velocity time integral ratio (TRG/VTI), were derived at baseline, during AAR and at two follow-ups...
November 23, 2016: Pediatric Cardiology
https://www.readbyqxmd.com/read/27866132/a-tool-for-predicting-the-outcome-of-reperfusion-in-st-elevation-myocardial-infarction-using-age-thrombotic-burden-and-index-of-microcirculatory-resistance-ati-score
#14
Giovanni Luigi De Maria, Gregor Fahrni, Mohammad Alkhalil, Florim Cuculi, Sam Dawkins, Mathias Wolfrum, Robin P Choudhury, John C Forfar, Bernard D Prendergast, Tuncay Yetgin, Robert Jan van Geuns, Matteo Tebaldi, Keith M Channon, Rajesh K Kharbanda, Peter M Rothwell, Marco Valgimigli, Adrian P Banning
AIMS: Restoration of effective myocardial reperfusion by primary percutaneous coronary intervention (PPCI) in patients with ST-elevation myocardial infarction is difficult to predict. A method to assess the likelihood of a suboptimal response to conventional pharmacomechanical therapies could be beneficial. We aimed to derive and validate a scoring system that can be used acutely at the time of coronary reopening to predict the likelihood of downstream microvascular impairment in patients with STEMI...
November 20, 2016: EuroIntervention
https://www.readbyqxmd.com/read/27862239/quantitative-echocardiographic-measures-in-the-assessment-of-single-ventricle-function-post-fontan-incorporation-into-routine-clinical-practice
#15
Rodrigo Rios, Salil Ginde, David Saudek, Rohit S Loomba, Jessica Stelter, Peter Frommelt
BACKGROUND: Quantitative echocardiographic measurements of single ventricular (SV) function have not been incorporated into routine clinical practice. METHODS: A clinical protocol, which included quantitative measurements of SV deformation (global circumferential and longitudinal strain and strain rate), standard deviation of time to peak systolic strain, myocardial performance index (MPI), dP/dT from an atrioventricular valve regurgitant jet, and superior mesenteric artery resistance index, was instituted for all patients with a history of Fontan procedure undergoing echocardiography...
January 2017: Echocardiography
https://www.readbyqxmd.com/read/27803036/comparative-prognostic-utility-of-indexes-of-microvascular-function-alone-or-in-combination-in-patients-with-an-acute-st-segment-elevation-myocardial-infarction
#16
David Carrick, Caroline Haig, Nadeem Ahmed, Jaclyn Carberry, Vannesa Teng Yue May, Margaret McEntegart, Mark C Petrie, Hany Eteiba, Mitchell Lindsay, Stuart Hood, Stuart Watkins, Andrew Davie, Ahmed Mahrous, Ify Mordi, Ian Ford, Aleksandra Radjenovic, Keith G Oldroyd, Colin Berry
BACKGROUND: Primary percutaneous coronary intervention is frequently successful at restoring coronary artery blood flow in patients with acute ST-segment-elevation myocardial infarction; however, failed myocardial reperfusion commonly passes undetected in up to half of these patients. The index of microvascular resistance (IMR) is a novel invasive measure of coronary microvascular function. We aimed to investigate the pathological and prognostic significance of an IMR>40, alone or in combination with a coronary flow reserve (CFR≤2...
December 6, 2016: Circulation
https://www.readbyqxmd.com/read/27801303/levosimendan-use-increases-cardiac-performance-after-coronary-artery-bypass-grafting-in-end-stage-renal-disease-patients
#17
Hakan Atalay, Zeki Temizturk, Hasan Baki Altinsoy, Davut Azboy, Salih Colak, Atakan Atalay, Omer Faruk Dogan
BACKGROUND: The effect of levosimendan on myocardial performance has not been studied in dialysis-dependent end-stage renal disease patients who have undergone coronary artery bypass grafting (CABG) surgery. Our aim was to investigate the effect of levosimendan on postoperative hemodynamic effects in end-stage renal disease patients undergoing CABG operation. METHODS: We performed 58 elective isolated CABG operations in end-stage renal disease patients. The study group received levosimendan at a slow bolus dose of 3 µg/kg, followed by a 24-hour infusion of 0...
October 27, 2016: Heart Surgery Forum
https://www.readbyqxmd.com/read/27792267/very-low-birthweight-bronchopulmonary-dysplasia-survivors-had-similar-cardiac-outcomes-to-controls-at-six-years-to-14-years-of-age
#18
Piia Suursalmi, Anneli Eerola, Tuija Poutanen, Päivi Korhonen, Tarja Kopeli, Outi Tammela
AIM: This study evaluated cardiac function and its associations with lung function and neonatal pulmonary morbidity in very low birthweight (VLBW) children, with and without severe radiographic bronchopulmonary dysplasia (radBPD), at school age. METHODS: We examined 18 VLBW children with radBPD, 17 VLBW children without radBPD and 18 healthy term-born children using conventional echocardiography, tissue Doppler imaging, speckle tracking echocardiography and real-time three-dimensional echocardiography at six years to 14 years of age...
February 2017: Acta Paediatrica
https://www.readbyqxmd.com/read/27766047/microrna-in-atherothromobosis-is-it-useful-as-a-disease-marker
#19
Satoshi Fujii, Tomonori Sugiura, Yasuaki Dohi, Nobuyuki Ohte
Atherosclerosis is one of the major causes of death. Data from animal experiments suggest that atherosclerosis involves an inflammatory process of the vascular wall under hyperlipidemia. Atherothrombosis can become a serious complication of atherosclerosis leading to acute cardiovascular events such as myocardial infarction and stroke. Clinical applications to use this knowledge remain scarce. The plasma levels of vascular endothelium-enriched microRNA (miRNAs) in patients with atherosclerotic vascular disease could serve as a disease marker...
2016: Thrombosis Journal
https://www.readbyqxmd.com/read/27753979/os-12-06-effect-of-long-term-iloprost-treatment-on-the-right-ventricular-function-in-patients-with-eisenmenger-syndrome
#20
Kyoung Im Cho, Min Gu Chon
OBJECTIVE: Inhaled ilroprost can improve clinical status and symptoms in Eisenmenger syndrome (ES). Right ventricular (RV) function is important prognostic factor of pulmonary arterial hypertension. But there has been insufficient data in echocardiographic parameters related to RV function after long term iloprost therapy. So we evaluated effect of long term iloprost treatment on RV function and other parameters measured by echocardiography in this study. DESIGN AND METHOD: Eleven consecutive patients with ES associated with congenital heart disease underwent echocardiographic measurements at baseline and 48 weeks after iloprost therapy...
September 2016: Journal of Hypertension
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