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https://www.readbyqxmd.com/read/29352588/pulmonary-reinterventions-after-complete-unifocalization-and-repair-in-infants-and-young-children-with-tetralogy-of-fallot-with-major-aortopulmonary-collaterals
#1
Holly Bauser-Heaton, Alejandro Borquez, Ritu Asija, Lisa Wise-Faberowski, Yulin Zhang, Laura Downey, Stanton B Perry, Andrew Koth, Lynn F Peng, Claudia A Algaze, Frank L Hanley, Doff B McElhinney
BACKGROUND: Our institutional approach to tetralogy of Fallot (TOF) with major aortopulmonary collaterals (MAPCAs) emphasizes unifocalization and augmentation of the reconstructed pulmonary arterial (PA) circulation and complete intracardiac repair in infancy, usually in a single procedure. This approach yields a high rate of complete repair with excellent survival and low right ventricular (RV) pressure. However, little is known about remodeling of the unifocalized and reconstructed pulmonary circulation or about reinterventions on the reconstructed PAs or the RV outflow tract conduit...
December 13, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29352340/angiotensin-1-7-induced-mas-receptor-activation-attenuates-atherosclerosis-through-a-nitric-oxide-dependent-mechanism-in-apolipoproteine-ko-mice
#2
Guang Yang, Geoffrey Istas, Sascha Höges, Mina Yakoub, Ulrike Hendgen-Cotta, Tienush Rassaf, Ana Rodriguez-Mateos, Lydia Hering, Maria Grandoch, Evanthia Mergia, Lars Christian Rump, Johannes Stegbauer
Angiotensin (Ang)-(1-7) ameliorates vascular injury by increasing nitric oxide (NO) bioavailability. Evidence that Ang-(1-7) attenuates the development of atherosclerosis through a NO-dependent mechanism is still missing. Moreover, it has been postulated that Ang-(1-7) may mediate its effects by other mechanisms than Mas receptor activation. To investigate Ang-(1-7)-dependent Mas receptor function, we treated apoE-KO and apoE/Mas-KO mice chronically with Ang-(1-7) (82 μg/kg per hour) or saline for 6 weeks...
January 20, 2018: Pflügers Archiv: European Journal of Physiology
https://www.readbyqxmd.com/read/29351450/cardiac-vanilloid-receptor-1-afferent-depletion-enhances-stellate-ganglion-neuronal-activity-and-efferent-sympathetic-response-to-cardiac-stress
#3
Koji Yoshie, Pradeep S Rajendran, Louis Massoud, OhJin Kwon, Vasudev Tadimeti, Siamak Salavatian, Jeffrey Laurence Ardell, Kalyanam Shivkumar, Olujimi A Ajijola
Afferent fibers expressing the vanilloid receptor 1 (VR1) channel are implicated in cardiac nociception, however, their role in modulating reflex responses to cardiac stress is not well-understood. We evaluated this role in Yorkshire pigs by percutaneous epicardial application of resiniferatoxin (RTX), a toxic activator of the VR1 channel, resulting in depletion of cardiac VR1-expressing afferents. Hemodynamics, epicardial activation recovery intervals (ARIs), and in vivo activity of stellate ganglion (SG) neurons (SGNs) were recorded in control and RTX-treated animals...
January 16, 2018: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/29350681/aav-9-mediated-phosphatase-1-inhibitor-1-overexpression-improves-cardiac-contractility-in-unchallenged-mice-but-is-deleterious-in-pressure-overload
#4
D M Schwab, L Tilemann, R Bauer, M Heckmann, A Jungmann, M Wagner, J Burgis, C Vettel, H A Katus, A El-Armouche, O J Müller
The downregulation of β-adrenergic receptors (β-AR) and decreased cAMP-dependent protein kinase activity in failing hearts results in decreased phosphorylation and inactivation of phosphatase-inhibitor-1 (I-1), a distal amplifier element of β-adrenergic signaling, leading to increased protein phosphatase 1 activity and dephosphorylation of key phosphoproteins, including phospholamban. Downregulated and hypophosphorylated I-1 likely contributes to β-AR desensitization; therefore its modulation is a promising approach in heart failure treatment...
January 19, 2018: Gene Therapy
https://www.readbyqxmd.com/read/29349395/delayed-migration-of-a-thrombosed-aortic-endograft-within-a-thrombosed-aneurysm-sac-resulting-in-continued-sac-expansion-and-rupture
#5
Edvard Skripochnik, Nicos Labropoulos, Shang A Loh
We present the case of delayed migration of a thrombosed aortic endograft within a thrombosed aneurysm sac that expanded and ruptured. Dilation of the aortic neck likely led to endograft migration and exposure of the occluded endograft and aneurysm sac to systemic pressure. Although no endoleak was identified, a key finding on ultrasound showed mobility of the sac thrombus. This may be an indicator of flow within the sac that may predict potential for rupture. Despite thrombosis of the aortic sac and endograft, the risk of rupture still lingers, and thus continued surveillance of occluded endografts may be prudent...
September 2017: Journal of Vascular Surgery Cases and Innovative Techniques
https://www.readbyqxmd.com/read/29345099/aortic-versus-carotid-intima-media-thickness-and-impact-of-aortic-valve-disease
#6
Johan Petrini, Margareta Ring, Anders Franco-Cereceda, Kenneth Caidahl, Maria J Eriksson
BACKGROUND AND AIMS: Intima-media thickness is a marker for atherosclerosis but is also influenced by shear stress and flow. We evaluated the relation between intima-media thickness of the descending aorta (AoIMT) and the common carotid artery (CIMT) in patients with and without severe aortic valve disease (sAVD). METHODS: A total of 310 patients (233 with sAVD, 77 without) were examined with regard to AoIMT and CIMT using transesophageal echocardiography and carotid ultrasound, respectively, before valvular and/or aortic surgery...
January 17, 2018: Clinical Physiology and Functional Imaging
https://www.readbyqxmd.com/read/29343674/a-spontaneous-abdominal-aortic-pseudoaneurysm-treated-with-n-butyl-cyanoacrylate-and-coil-embolization-a-case-report
#7
Chan Sun Kim, Young Ho Choi, Young Ho So, Jae-Sung Choi
Pseudoaneurysms are vascular spaces vulnerable to pressure, and expansion or rupture of these spaces may occur during embolization. Here, we describe the case of a transcatheter embolization of a spontaneous aortic pseudoaneurysm, which showed gradual expansion during n-butyl cyanoacrylate embolization. This pseudoaneurysm was successfully embolized with an adjuvant coil.
January 16, 2018: Annals of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29340633/kinking-of-an-open-stent-graft-after-total-arch-replacement-with-the-frozen-elephant-technique-for-acute-type-a-aortic-dissection
#8
Akimasa Morisaki, Tadashi Isomura, Yasuhisa Fukada, Minoru Yoshida
Recently, in Japan, the J Graft Open Stent Graft (JOSG) was commercialized for surgical repair of an aortic aneurysm and aortic dissection and the frozen elephant trunk technique was applied. Kinking of the JOSG is a rare adverse event that requires additional intervention. We experienced 2 patients who developed kinking of a JOSG after translocated total arch replacement with the frozen elephant trunk technique for acute Type A aortic dissection. Both patients had intermittent claudication with a decreased ankle-brachial pressure index after the operation...
January 10, 2018: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29340630/sutureless-prosthesis-for-failed-small-mitroflow-valves-the-perceval-after-mitroflow-procedure
#9
Giovanni A Chiariello, Emmanuel Villa, Antonio Messina, Margherita Dalla Tomba, Marco Cirillo, Federico Brunelli, Zean Mhagna, Giovanni Troise
Because of its favourable haemodynamic characteristics and easy implantability, Mitroflow aortic valve bioprosthesis has been the valve of choice for many surgeons in patients with small aortic annulus. Disappointingly, early structural valve deterioration and high transvalvular gradients have been reported mostly in older patients with small prostheses. Reimplanting a new stented prosthesis sutured in a narrow and damaged annulus is technically challenging and demanding mainly in high-risk patients. Valve-in-valve transcatheter aortic valve implantation has been proposed as a viable option; however, it presents significant limitations because of residual high transprosthetic pressure gradients and risk of coronary occlusion...
January 11, 2018: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29338037/stentless-vs-stented-bioprosthesis-for-aortic-valve-replacement-a-case-matched-comparison-of-long-term-follow-up-and-subgroup-analysis-of-patients-with-native-valve-endocarditis
#10
Andreas Schaefer, Jannis Dickow, Gerhard Schoen, Sumi Westhofen, Lisa Kloss, Tarik Al-Saydali, Hermann Reichenspurner, Sebastian A Philipp, Christian Detter
BACKGROUND: Current retrospective evidence suggests similar clinical and superior hemodynamic outcomes of the Sorin Freedom Solo stentless aortic valve (SFS) (LivaNova PLC, London, UK) compared to the Carpentier Edwards Perimount stented aortic valve (CEP) (Edwards Lifesciences Inc., Irvine, California, USA). To date, no reports exist describing case-matched long-term outcomes and analysis for treatment of native valve endocarditis (NVE). METHODS: From 2004 through 2014, 77 consecutive patients (study group, 59...
2018: PloS One
https://www.readbyqxmd.com/read/29337125/facilitating-hemostasis-after-proximal-aortic-surgery-results-of-the-protect-trial
#11
Ali Khoynezhad, Jacob DelaRosa, Marc R Moon, William T Brinkman, Richard B Thompson, Nimesh D Desai, S Chris Malaisrie, Leonard N Girardi, Joseph E Bavaria, T Brett Reece
BACKGROUND: This study intended to evaluate the safety and hemostatic efficacy of a novel vascular sealant (Tridyne™ , Neomend, Inc., Irvine, CA) compared to an accepted adjunctive hemostatic agent applied to aortotomy and sutures lines in cardiovascular surgery. METHODS: Subjects undergoing aortic valve replacement, ascending aortic replacement and/or aortic root replacement were randomized 2:1 to Tridyne™ (n =107) or Gelfoam®+ (Gelfoam®+, Baxter Healthcare Corp...
January 11, 2018: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/29336388/assessment-the-effect-of-dexmedetomidine-on-incidence-of-paradoxical-hypertension-after-surgical-repair-of-aortic-coarctation-in-pediatric-patients
#12
Rabie Soliman, Dalia Saad
OBJECTIVE: The aim of the study was to assess the effect of dexmedetomidine on the incidence of paradoxical hypertension in patients undergoing aortic coarctation repair. DESIGN: Randomized observational study. SETTING: University hospital and cardiac center. PATIENTS: The study included 108 pediatric patients with isolated aortic coarctation. METHODS: The patients were classified into two groups (each = 54): Group D: the patients received dexmedetomidine as a loading dose of 0...
January 2018: Annals of Cardiac Anaesthesia
https://www.readbyqxmd.com/read/29335617/cardiovascular-function-of-modern-pigs-does-not-comply-with-allometric-scaling-laws
#13
Gerard J van Essen, Maaike Te Lintel Hekkert, Oana Sorop, Ilkka Heinonen, Jolanda van der Velden, Daphne Merkus, Dirk J Duncker
Growing concerns have been expressed regarding cardiovascular performance in modern farm pigs, which has been proposed as a critical factor contributing to the reduced adaptability of modern pigs to stress. Here we tested the hypothesis that cardiac dimensions and pump function in modern heavy farm pigs are disproportionally low for their body weight, and investigated potential underlying mechanisms. The results from the present study indeed demonstrate disproportionally low values for stroke volume and cardiac output in pigs with bodyweights over 150 kg...
January 15, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29335614/reliability-of-pulse-waveform-separation-analysis-responses-to-an-orthostatic-challenge
#14
Lee Stoner, Keeron Stone, Erik D Hanson, James Faulkner, Simon Fryer, Daniel Credeur
Cardiovascular autonomic nervous system function can be assessed using an orthostatic challenge to induce arterial wave reflection. While arterial reflection is typically estimated using a central augmentation index, a superior estimation can be obtained using pulse wave separation analysis to estimate the aortic backward pressure wave (Pb). However, to be of value in a clinical or research setting, an assessment tool must be precise (reliable). Therefore, this study sought to determine the measurement precision of Pb responses to a modified tilt-table test...
January 15, 2018: Hypertension Research: Official Journal of the Japanese Society of Hypertension
https://www.readbyqxmd.com/read/29335250/akap1-regulates-vascular-function-and-endothelial-cells-behavior
#15
Gabriele Giacomo Schiattarella, Fabio Cattaneo, Albino Carrizzo, Roberta Paolillo, Nicola Boccella, Mariateresa Ambrosio, Antonio Damato, Gianluigi Pironti, Anna Franzone, Giusi Russo, Fabio Magliulo, Marinella Pirozzi, Marianna Storto, Michele Madonna, Giuseppe Gargiulo, Valentina Trimarco, Laura Rinaldi, Massimiliano De Lucia, Corrado Garbi, Antonio Feliciello, Giovanni Esposito, Carmine Vecchione, Cinzia Perrino
MitoAKAPs (mitochondrial A kinase anchoring proteins), encoded by the Akap1 gene, regulate multiple cellular processes governing mitochondrial homeostasis and cell viability. Although mitochondrial alterations have been associated to endothelial dysfunction, the role of mitoAKAPs in the vasculature is currently unknown. To test this, postischemic neovascularization, vascular function, and arterial blood pressure were analyzed in Akap1 knockout mice (Akap1-/- ) and their wild-type (wt) littermates. Primary cultures of aortic endothelial cells (ECs) were also obtained from Akap1-/- and wt mice, and ECs migration, proliferation, survival, and capillary-like network formation were analyzed under different experimental conditions...
January 15, 2018: Hypertension
https://www.readbyqxmd.com/read/29334670/genetic-ablation-of-trpv1-exacerbates-pressure-overload-induced-cardiac-hypertrophy
#16
Beihua Zhong, Jack Rubinstein, Shuangtao Ma, Donna H Wang
Transient receptor potential vanilloid 1 (TRPV1) channels expressed in sensory nerves may regulate vascular tone and cardiovascular function via their anti-inflammatory effects by releasing neuropeptide calcitonin gene-related peptide (CGRP). Inflammation plays a role in the progression of cardiac hypertrophy and TRPV1 activation may be key to cardiac inflammatory processes. The aim of this study was to test the hypothesis that TRPV1 modulates inflammatory processes to protect the heart from pressure overload-induced hypertrophy and inflammatory responses...
January 12, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29334490/differential-impact-of-local-and-regional-aortic-stiffness-on-left-ventricular-remodeling-a-cardiovascular-magnetic-resonance-study
#17
Thiago Quinaglia, Mourad Z Bensalah, Emilie Bollache, Nadjia Kachenoura, Gilles Soulat, Pierre Boutouyrie, Stéphane Laurent, Elie Mousseaux
BACKGROUND: Left ventricular (LV) remodeling and aortic stiffness have independent predictive value for all causes and cardiovascular mortality. Because elastic properties of the arterial wall vary along the aortic pathway, we hypothesized that local and regional aortic stiffness could differently impact on LV remodeling. METHODS AND RESULTS: Regional aortic stiffness was determined from carotid-femoral pulse wave velocity (cfPWV) measured by aplanation tonometry...
January 13, 2018: Journal of Hypertension
https://www.readbyqxmd.com/read/29331788/curcumin-inhibits-cardiac-hypertrophy-and-improves-cardiovascular-function-via-enhanced-na-ca2-exchanger-expression-after-transverse-abdominal-aortic-constriction-in-rats
#18
Xiao-Jie Bai, Jun-Tao Hao, Jin Wang, Wei-Fang Zhang, Cai-Ping Yan, Jia-Hui Zhao, Zhi-Qing Zhao
BACKGROUND: This study tested the hypothesis that inhibition of cardiac hypertrophy and preservation of cardiac/endothelial function by the natural yellow pigment curcumin are associated with upregulated expression of Na+/Ca2+ exchanger (NCX) after transverse aortic constriction (TAC). METHODS: Male Wistar rats were subjected to TAC for 10 weeks and curcumin (50 mg/kg/day) was fed by gastric gavage during TAC. Expression of NCX and endothelial nitric oxide synthase (eNOS) was analyzed by Western blot and immunohistochemistry...
July 15, 2017: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/29331689/baicalin-inhibits-pressure-overload-induced-cardiac-fibrosis-through-regulating-ampk-tgf-%C3%AE-smads-signaling-pathway
#19
Yichuan Xiao, Jiantao Ye, Ying Zhou, Junjun Huang, Xiawen Liu, Biyun Huang, Liu Zhu, Bo Wu, Genshui Zhang, Yi Cai
AMP-activated protein kinase (AMPK) is a central regulator of multiple metabolic pathways. It has been shown that activation of AMPK could inhibit fibroblast proliferation and extracellular matrix (ECM) accumulation, thereby suppressing cardiac fibrosis. Baicalin, the major component found in skullcap, possesses multiple protective effects on the cardiovascular system. However, little is known about the effect of baicalin on cardiac fibrosis and the molecular mechanism by which baicalin exerts its anti-fibrotic effects has not been investigated...
January 10, 2018: Archives of Biochemistry and Biophysics
https://www.readbyqxmd.com/read/29329067/case-report-iatrogenic-brachial-artery-dissection-with-complete-anterograde-occlusion-during-elective-arterial-line-placement
#20
Laurence Weinberg, Diana Abu-Ssaydeh, Manfred Spanger, Patrick Lu, Michael H-G Li
INTRODUCTION: Brachial arterial catheters provide a more accurate reflection of central aortic arterial pressure compared to their radial counterparts. Although brachial arterial line complications are uncommon, we report a case of a rare iatrogenic brachial artery dissection with complete anterograde occlusion from elective arterial line placement. PRESENTATION OF CASE: A 41-year-old female presented for a right upper and middle lobe resection of a large neuroendocrine lung cancer...
December 27, 2017: International Journal of Surgery Case Reports
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