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https://www.readbyqxmd.com/read/29452273/3d-bioprinted-functional-and-contractile-cardiac-tissue-constructs
#1
Zhan Wang, Sang Jin Lee, Heng-Jie Cheng, James J Yoo, Anthony Atala
Bioengineering of a functional cardiac tissue composed of primary cardiomyocytes has great potential for myocardial regeneration and in vitro tissue modeling. However, its applications remain limited because the cardiac tissue is a highly organized structure with unique physiologic, biomechanical, and electrical properties. In this study, we undertook a proof-of-concept study to develop a contractile cardiac tissue with cellular organization, uniformity, and scalability by using three-dimensional (3D) bioprinting strategy...
February 13, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29450473/elevated-blood-viscosity-and-micro-recirculation-linked-to-coronary-stent-malapposition
#2
Eric Poon, Vikas Thondapu, Umair Hayat, Peter Barlis, Chooi Yap, Po Kuo, Qisen Wang, Jiawei Ma, Shuang Zhu, Stephen Moore, Andrew Ooi
One particular complexity of coronary artery is the natural tapering of the vessel with proximal segments having larger caliber and distal tapering as the vessel get smaller. The natural tapering of a coronary artery often leads to proximal incomplete stent apposition (ISA). ISA alters coronary hemodynamics and creates pathological path to develop complications such as in-stent restenosis, and more worryingly, stent thrombosis. By employing state-of-the-art computer-aided design software, generic stent hoops were virtually deployed in an idealized tapered coronary artery with decreasing malapposition distance...
February 14, 2018: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/29449442/design-and-rationale-of-the-ripcord-2-trial-does-routine-pressure-wire-assessment-influence-management-strategy-at-coronary-angiography-for-diagnosis-of-chest-pain-a-randomized-controlled-trial-to-compare-routine-pressure-wire-assessment-with-conventional-angiography
#3
REVIEW
Mostafa Elguindy, Rod Stables, Zoe Nicholas, Ian Kemp, Nick Curzen
BACKGROUND: Investigation of anginal chest pain has traditionally involved either assessment of the coronary anatomy by angiography or noninvasive testing for reversible ischemia. Invasive pressure wire assessment at the time of angiography offers information on both anatomy and physiology. Fractional flow reserve-guided percutaneous coronary intervention is associated with lower resource utilization and improved clinical outcome compared with angiographic guidance alone. However, the value of routine fractional flow reserve of all major coronary vessels at the time of diagnostic angiography has not been established in a randomized trial despite persuasive observational data...
February 2018: Circulation. Cardiovascular Quality and Outcomes
https://www.readbyqxmd.com/read/29449274/clinical-relevance-of-functionally-insignificant-moderate-coronary-artery-stenosis-assessed-by-3-vessel-fractional-flow-reserve-measurement
#4
Jonghanne Park, Joo Myung Lee, Bon-Kwon Koo, Eun-Seok Shin, Chang-Wook Nam, Joon-Hyung Doh, Doyeon Hwang, Jinlong Zhang, Xinyang Hu, JianAn Wang, Fei Ye, Shaoliang Chen, Junqing Yang, Jiyan Chen, Nobuhiro Tanaka, Hiroyoshi Yokoi, Hitoshi Matsuo, Hiroaki Takashima, Yasutsugu Shiono, Takashi Akasaka
BACKGROUND: Understanding of the risk conferred by functionally insignificant lesions in multiple coronary vessels is limited. We investigated the prognostic implications of coronary artery disease (CAD) based on 3-vessel fractional flow reserve (FFR). METHODS AND RESULTS: A total of 1,136 patients underwent FFR measurement in the 3 major epicardial arteries. We defined vessels with "Moderate CAD" as vessels with FFR, 0.81 to 0.87. Patients were classified into Group 1: No apparent CAD (FFR>0...
February 15, 2018: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29449272/differential-clinical-outcomes-between-angiographic-complete-versus-incomplete-coronary-revascularization-according-to-the-presence-of-chronic-kidney-disease-in-the-drug-eluting-stent-era
#5
Jihoon Kim, Joo Myung Lee, Ki Hong Choi, Tae-Min Rhee, Doyeon Hwang, Jonghanne Park, Chul Ahn, Taek Kyu Park, Jeong Hoon Yang, Young Bin Song, Jin-Ho Choi, Joo-Yong Hahn, Seung-Hyuk Choi, Hyeon-Cheol Gwon
BACKGROUND: There are limited data regarding the prognostic impact of angiographic complete revascularization (CR) in patients with chronic kidney disease (CKD). We sought to investigate the differential prognostic impact of angiographic CR over incomplete revascularization (IR), according to the presence of CKD in the drug-eluting stent era. METHODS AND RESULTS: Between 2003 and 2011 at Samsung Medical Center, consecutive patients with multivessel disease were stratified by the presence of CKD (estimated glomerular filtration rate <60 mL/min per 1...
February 15, 2018: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29448976/in-endothelial-cells-the-activation-or-stimulation-of-soluble-guanylyl-cyclase-induces-the-nitric-oxide-production-by-a-mechanism-dependent-of-nitric-oxide-synthase-activation
#6
Ariane Migliato Martinelli, Carla Nascimento Dos Santos Rodrigues, Thiago Francisco de Moraes, Gerson Jhonatan Rodrigues
PURPOSE: In endothelial cells, investigate if the soluble guanylate cyclase (sGC) activation or stimulation is able to potentiate the relaxation in vessels. METHODS: Aortic and coronary rings with and without endothelium were placed in a myograph and cumulative concentration-effect curves for DETA-NO or ataciguat were performed. Nitric oxide (NO) were measured by fluorescence or by selective electrode in human umbilical endothelial cells (HUVECs) in response to some treatments, including ataciguat, 8-Br-cGMP and A23187...
2018: Journal of Pharmacy & Pharmaceutical Sciences: a Publication of the Canadian Society for Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29448251/expression-of-lectin-like-oxidized-low-density-lipoprotein-receptor-1-in-human-epicardial-and-intramyocardial-coronary-arteries-of-male-patients-undergoing-coronary-artery-bypass-grafting
#7
Andreas Synetos, Antonios Karanasos, Stauros Spyropoulos, Maria Gazouli, George Latsios, Konstantinos Toutouzas, Despina Perrea, Dimitrios Tousoulis, Ioannis A Chloroyiannis
OBJECTIVES: Atherosclerosis is almost absent in intramyocardial coronary arteries, while epicardial coronary arteries may show extensive occlusive disease. Lectin-like oxidized low-density lipoprotein receptor-1 (LOX-1) expression has been implicated in atherogenesis. We aimed to investigate differences in arterial wall LOX-1 expression between human epicardial and intramyocardial coronary arteries. METHODS: Epicardial and intramyocardial total artery wall specimens were obtained from 13 male patients (aged 61...
February 15, 2018: Cardiology
https://www.readbyqxmd.com/read/29447780/nonprimary-pci-at-hospitals-without-cardiac-surgery-on-site-consistent-outcomes-for-all
#8
Matthew J Czarny, Julie M Miller, Daniel Q Naiman, Chao-Wei Hwang, Rani K Hasan, Cynthia C Lemmon, Thomas Aversano
BACKGROUND: The CPORT-E trial showed the noninferiority of nonprimary percutaneous coronary intervention (PCI) at hospitals without cardiac surgery on-site (SoS) compared with hospitals with SoS for 6-week mortality and 9-month major adverse cardiac events (MACE). However, target vessel revascularization (TVR) was increased at non-SoS hospitals. Therefore, we aimed to determine the consistency of the CPORT-E trial findings across the spectrum of enrolled patients. METHODS: Post hoc subgroup analyses of 6-week mortality and 9-month MACE, defined as the composite of death, Q-wave myocardial infarction, or TVR, were performed...
March 2018: American Heart Journal
https://www.readbyqxmd.com/read/29447774/percutaneous-coronary-intervention-of-lesions-with-in-stent-restenosis-a-report-from-the-adapt-des-study
#9
Björn Redfors, Philippe Généreux, Bernhard Witzenbichler, Akiko Maehara, Giora Weisz, Thomas McAndrew, Roxana Mehran, Ajay J Kirtane, Gregg W Stone
BACKGROUND: There is a paucity of data from large contemporary cohorts of patients with in-stent restenosis (ISR) treated with drug-eluting stents (DESs), and no studies have examined the impact of high platelet reactivity (HPR) on the occurrence of ischemic events after ISR percutaneous coronary intervention (PCI) with DESs. We sought to report outcomes after PCI of ISR lesions and its association with HPR. METHODS: Patients in the prospective, multicenter ADAPT-DES study were stratified according to whether they had ISR versus non-ISR PCI...
March 2018: American Heart Journal
https://www.readbyqxmd.com/read/29446567/prognostic-value-of-the-index-of-microcirculatory-resistance-after-percutaneous-coronary-intervention-in-patients-with-non-st-segment-elevation-acute-coronary-syndrome
#10
Tadashi Murai, Taishi Yonetsu, Yoshihisa Kanaji, Eisuke Usui, Masahiro Hoshino, Masahiro Hada, Rikuta Hamaya, Yoshinori Kanno, Tetsumin Lee, Tsunekazu Kakuta
BACKGROUND: The prognostic value of physiological indices in non-ST-segment elevation acute coronary syndrome (NSTE-ACS) patients undergoing percutaneous coronary intervention (PCI) is unknown. We investigated the prognostic efficacy of physiological indices obtained after PCI in patients with NSTE-ACS. METHODS: Eighty-three patients (men: n = 70, age: 63.7 ± 9.7 years) undergoing PCI for NSTE-ACS within 48 hr postadmission were investigated. Fractional flow reserve (FFR), coronary flow reserve (CFR), and the index of microcirculatory resistance (IMR) of the culprit vessels were measured after the completion of PCI...
February 15, 2018: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/29444599/correlation-between-epicardial-fat-thickness-and-aortic-valve-sclerosis
#11
Maryam Nabati, Maryam Favaedi, Masoud Kheirgoo, Jamshid Yazdani, Mozhdeh Dabirian
Background Epicardial fat is a true visceral fat deposit with adverse effects through the secretion of numerous proinflammatory and proatherogenic cytokines. Previous studies showed an association between aortic valve sclerosis and coronary artery disease. The aim of this study was to determine the correlation between epicardial fat thickness and aortic valve sclerosis. Method The study involved 225 patients who were admitted for coronary angiography due to new-onset angina. They underwent transthoracic echocardiography and epicardial fat thickness was determined...
January 1, 2018: Asian Cardiovascular & Thoracic Annals
https://www.readbyqxmd.com/read/29444520/remodeling-of-wall-mechanics-and-the-myogenic-mechanism-of-rat-intramural-coronary-arterioles-in-response-to-a-short-term-daily-exercise-program-role-of-endothelial-factors
#12
Mária Szekeres, György L Nádasy, Gabriella Dörnyei, Annamária Szénási, Akos Koller
PURPOSE: Exercise elicits early adaptation of coronary vessels enabling the coronary circulation to respond adequately to higher flow demands. We hypothesized that short-term daily exercise induces biomechanical and functional remodeling of the coronary resistance arteries related to pressure. METHODS: Male rats were subjected to a progressively increasing 4-week treadmill exercise program (over 60 min/day, 1 mph in the final step). In vitro pressure-diameter measurements were performed on coronary segments (119 ± 5 μm in diameter at 50 mm Hg) with microarteriography...
February 14, 2018: Journal of Vascular Research
https://www.readbyqxmd.com/read/29444223/glp-1-receptor-expression-within-the-human-heart
#13
Laurie L Baggio, Bernardo Yusta, Erin E Mulvihill, Xiemin Cao, Catherine J Streutker, Jagdish Butany, Thomas P Cappola, Kenneth B Margulies, Daniel J Drucker
Glucagon-like peptide-1 receptor (GLP-1R) agonists, used to treat type 2 diabetes and obesity, reduce rates of myocardial infarction and cardiovascular death. The GLP-1R has been localized to the human sinoatrial node; however, its expression in ventricular tissue remains uncertain. Here we studied GLP-1R expression in the human heart using GLP-1R-directed antisera, quantitative PCR, reverse transcription PCR to detect full length mRNA transcripts, and in situ hybridization. GLP1R mRNA transcripts, encompassing the entire open reading frame, were detected in all four cardiac chambers from 15 hearts at levels approximating those detected in human pancreas...
February 12, 2018: Endocrinology
https://www.readbyqxmd.com/read/29443740/clinical-outcomes-of-left-main-coronary-artery-disease-patients-undergoing-three-different-revascularization-approaches
#14
Chieh-Shou Su, Yu-Wei Chen, Ching-Hui Shen, Tsun-Jui Liu, Yen Chang, Wen-Lieng Lee
Significant unprotected left main (LM) coronary artery disease is frequently associated with severe multivessel disease and increased mortality and morbidity compared with non-LM coronary artery disease. This study compared the clinical outcomes of patients with LM disease who received percutaneous coronary intervention (PCI) with stenting, conventional coronary-artery bypass grafting (C-CABG), and robot-assisted CABG (R-CABG).This retrospective study analyzed 472 consecutive LM disease patients who underwent three different revascularization approaches at a tertiary medical center between January 2005 and November 2013...
February 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29439739/sex-difference-in-clot-lysability-and-association-to-coronary-artery-calcification
#15
Ramshanker Ramanathan, Niels Peter R Sand, Johannes J Sidelmann, Bjarne L Nørgaard, Jørgen B Gram
BACKGROUND: Incidence and prevalence of cardiovascular disease (CVD) differ between sexes, and women experience CVD later than men. Changes in fibrin clot lysability are associated with CVD, and the present study addresses sex differences in fibrin clot lysability in asymptomatic middle-aged individuals and the relation to coronary artery calcification (CAC). METHODS: Participants free of morbidities and medication, N = 163, were randomly chosen from a national registry among citizens, 50 or 60 years of age, and were followed for 5 years...
February 13, 2018: Biology of Sex Differences
https://www.readbyqxmd.com/read/29437709/prader-willi-syndrome-a-nest-for-premature-coronary-artery-disease
#16
Diogo Rodrigues Brás, Pedro Semedo, Bruno Cordeiro Piçarra, Renato Fernandes
Individuals affected by Prader-Willi syndrome (PWS) may show increased risk for coronary artery disease (CAD), which probably relates, at least, with high burden of cardiovascular risk factors.A 27-year-old man with PWS, obesity, hypertension, diabetes mellitus and dyslipidaemia attended the emergency department with complaints of flu-like condition and chest pain. The ECG revealed a mild ST-segment elevation in inferior leads, followed by positive myocardial necrosis biomarkers. Attending to the high cardiovascular risk profile, ST-segment elevation in inferior territory and wall motion abnormalities, a coronary angiogram was performed...
February 7, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29435997/coronary-venous-angioplasty-to-facilitate-trans-venous-left-ventricular-lead-placement-a-single-center-13-year-experience
#17
Aaron B Hesselson, Sandeep Duggal, Michael Rukavina, Peter L Gallagher, Gery F Tomassoni
BACKGROUND: Barriers to successful left ventricular lead placement within the coronary venous anatomy may include focal stenoses, thromboses, phrenic nerve stimulation, vessel tortuosity, small vessel caliber, non-excitable tissue and valve presence. A large series describing the utilization of coronary venous angioplasty (CVAP) for relief of these issues is absent in the literature. OBJECTIVE: We report our experience for all patients treated with CVAP in a single-center 13-year experience...
February 12, 2018: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29434132/usefulness-of-cutting-balloon-angioplasty-prior-to-stenting-with-intravascular-ultrasound-imaging-guidance-for-spontaneous-multi-vessel-coronary-dissection-including-the-left-main-coronary-artery
#18
Masahiko Noguchi, Kotaro Obunai, Yu Fukui, Hiroshi Okumura, Hiroyuki Watanabe
We report a case of percutaneous coronary intervention for spontaneous multi-vessel coronary dissection including the left main coronary artery. This case suggests that intracoronary imaging is useful for understanding the complex anatomy and for choosing the appropriate management for effective revascularization. Furthermore, cutting balloon angioplasty prior to stenting is useful for preventing the longitudinal extension of the intramural hematoma and avoiding unnecessary stent implantation.
February 9, 2018: Internal Medicine
https://www.readbyqxmd.com/read/29434090/determinants-and-long-term-outcomes-of-percutaneous-coronary-interventions-vs-surgery-for-multivessel-disease-according-to-clinical-presentation
#19
Sung-Jin Hong, Byeong-Keuk Kim, Sanghoon Shin, Yongsung Suh, Seunghwan Kim, Chul-Min Ahn, Jung-Sun Kim, Young-Guk Ko, Donghoon Choi, Myeong-Ki Hong, Yangsoo Jang
BACKGROUND: The long-term outcome of percutaneous coronary intervention (PCI) vs. coronary artery bypass graft (CABG), particularly for patients with non-ST-elevation acute coronary syndrome (NSTE-ACS), remains controversial.Methods and Results:We retrospectively analyzed 2,827 patients (stable coronary artery disease [SCAD], n=1,601; NSTE-ACS, n=1,226) who underwent either PCI (n=1,732) or CABG (n=1,095). The 8-year composite of cardiac death and myocardial infarction (MI) was compared between PCI and CABG before and after propensity matching...
February 9, 2018: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/29433968/dynamic-stress-computed-tomography-myocardial-perfusion-for-detecting-myocardial-ischemia-a-systematic-review-and-meta-analysis
#20
Minjie Lu, Shuli Wang, Arlene Sirajuddin, Andrew E Arai, Shihua Zhao
BACKGROUND: Comparing to SPECT and MRI, with higher temporal and spatial resolution and development of radiation dose reduction, myocardial computed tomography perfusion has emerged as a potential method for evaluation of hemodynamic myocardial ischemia. This meta-analysis systematically analyzed the performance of dynamic CT myocardial perfusion (DCTMP) to diagnose myocardial ischemia (MI) with clinically established reference methods [MR/SPECT/PET perfusion and fractional flow reserve (FFR)] as the reference standard...
February 10, 2018: International Journal of Cardiology
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