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https://www.readbyqxmd.com/read/28647112/arrhythmogenic-right-ventricular-cardiomyopathy-in-the-boxer-dog-an-update
#1
REVIEW
Kathryn M Meurs
Arrhythmogenic right ventricular cardiomyopathy is an inheritable form of myocardial disease characterized most commonly by ventricular tachycardias, syncope, and sometimes systolic dysfunction and heart failure. A genetic mutation in the striatin gene has been identified in many affected dogs. Dogs with only one copy of the mutation (heterozygous) have a variable prognosis with many dogs remaining asymptomatic or successfully managed on antiarrhythmic drugs for years. Dogs that are homozygous for the mutation seem to have a worse prognosis...
June 21, 2017: Veterinary Clinics of North America. Small Animal Practice
https://www.readbyqxmd.com/read/28641799/the-continued-search-for-physiological%C3%A2-pacing-where-are-we-now
#2
REVIEW
Pugazhendhi Vijayaraman, Pierre Bordachar, Kenneth A Ellenbogen
Cardiac pacing is an effective treatment for patients with bradycardia due to sinus node dysfunction or atrioventricular block. Despite decades of technological advances, the optimal ventricular pacing site to mimic normal human ventricular physiology and best hemodynamic response remains elusive. Beginning with atrial synchronous right ventricular (RV) apical pacing, the search has continued through alternate RV pacing sites, minimizing RV pacing, biventricular pacing, left ventricular (LV) pacing, and His-bundle pacing...
June 27, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28641753/cardiac-dysfunction-in-congenital-diaphragmatic-hernia-pathophysiology-clinical-assessment-and-management
#3
Neil Patel, Florian Kipfmueller
Cardiac dysfunction is an important consequence of pulmonary hypertension in congenital diaphragmatic hernia and a determinant of disease severity. Increased afterload leads to right ventricular dilatation and diastolic dysfunction. Septal displacement and dysfunction impair left ventricular function, which may also be compromised by fetal hypoplasia. Biventricular failure contributes to systemic hypotension and hypoperfusion. Early and regular echocardiographic assessment of cardiac function and pulmonary artery pressure can guide therapeutic decision-making, including choice and timing of pulmonary vasodilators, cardiotropes, ECMO, and surgery...
June 2017: Seminars in Pediatric Surgery
https://www.readbyqxmd.com/read/28639972/imaging-in-repaired-tetralogy-of-fallot-with-a-focus-on-recent-advances-in-echocardiography
#4
Guillermo Larios, Mark K Friedberg
PURPOSE OF REVIEW: Imaging is essential for the management of adults with repaired tetralogy of Fallot (rToF). Echocardiography and cardiac magnetic resonance imaging are the central modalities to assess rToF. Here we review recent literature on imaging rToF, focusing on echocardiography and advances in assessment of cardiac mechanics. RECENT FINDINGS: Several two-dimensional, three-dimensional, and Doppler echo parameters have been proposed to assess pulmonary regurgitation, right ventricular volumes and ejection fraction, but most of them still have important limitations in their feasibility and reliability compared to cardiac magnetic resonance (CMR)...
July 20, 2017: Current Opinion in Cardiology
https://www.readbyqxmd.com/read/28638021/-right-ventricular-dysfunction-after-tetralogy-of-fallot-repair-are-all-questions-resolved
#5
A Yu Omelchenko, I A Soynov, Yu N Gorbatykh, Yu Yu Kulyabin, A V Gorbatykh, N R Nichay, A V Voitov, A V Bogochev-Prokophiev
No abstract text is available yet for this article.
2017: Khirurgiia
https://www.readbyqxmd.com/read/28636525/prognostic-significance-of-improvement-in-right-ventricular-systolic-function-during-cardiac-resynchronization-therapy
#6
Frederik Helsen, Alexander Van De Bruaene, Charlien Gabriels, Mathias Claeys, Els Troost, Gábor Vörös, Rik Willems, Jens-Uwe Voigt, Werner Budts
Objectives There is conflicting evidence concerning the role of right ventricular (RV) systolic dysfunction in the long-term clinical outcome after cardiac resynchronization therapy (CRT). Therefore we aimed to assess evolution of RV systolic function during CRT, covariates associated with its improvement, and its impact on outcome. Methods and results All CRT device implantations (Jan 2009-Dec 2011) in our institution were reviewed. Records of 69 patients (25% female, mean age 62.8 ± 9.2 years, mean left ventricular (LV) ejection fraction 27 ± 8%) were analyzed...
March 31, 2017: Acta Cardiologica
https://www.readbyqxmd.com/read/28631361/optimal-right-heart-filling-pressure-in-acute-respiratory-distress-syndrome-determined-by-strain-echocardiography
#7
Romel Garcia-Montilla, Faryal Imam, Mi Miao, Kathryn Stinson, Akram Khan, Stephen Heitner
INTRODUCTION: Right ventricular (RV) systolic dysfunction is common in acute respiratory distress syndrome (ARDS). While preload optimization is crucial in its management, dynamic fluid responsiveness indices lack reliability, and there is no consensus on target central venous pressure (CVP). We analyzed the utility of RV free wall longitudinal strain (RVFWS) in the estimation of optimal RV filling pressure in ARDS. METHODS: A retrospective cross-sectional analysis of clinical data and echocardiograms of patients with ARDS was performed...
June 2017: Echocardiography
https://www.readbyqxmd.com/read/28631207/qrs-width-as-a-predictor-of-right-ventricular-remodeling-after-percutaneous-pulmonary-valve-implantation
#8
C Paech, I Dähnert, F T Riede, R Wagner, T Kister, K Nieschke, F Wagner, R A Gebauer
Recent data showed a right ventricular dyssynchrony in patients with tetralogy of Fallot (TOF). Percutaneous pulmonary valve implantation (PPVI) has become an important procedure to treat a pulmonary stenosis and/or regurgitation of the right ventricular outflow tract in these patients. Despite providing good results, there is still a considerable number of nonresponders to PPVI. The authors speculated that electrical dysfunction of the right ventricle plays an underestimated role in the outcome of patients after PPVI...
June 19, 2017: Pediatric Cardiology
https://www.readbyqxmd.com/read/28629852/bioelectronic-block-of-paravertebral-sympathetic-nerves-mitigates-post-myocardial-infarction-ventricular-arrhythmias
#9
Ray W Chui, Una Buckley, Pradeep S Rajendran, Tina Vrabec, Kalyanam Shivkumar, Jeffrey L Ardell
BACKGROUND: Autonomic dysfunction contributes to induction of ventricular tachyarrhythmia (VT). OBJECTIVE: To determine the efficacy of charge-balanced direct current (CBDC), applied to the T1-T2 segment of the paravertebral sympathetic chain, on VT inducibility post-myocardial infarction (MI). METHODS: In a porcine model, CBDC was applied in acute animals (n=7) to optimize stimulation parameters for sympathetic blockade and in chronic MI animals (n=7) to evaluate the potential for VTs...
June 16, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28628347/preventive-treatment-with-atorvastatin-ameliorates-endothelial-dysfunction-of-small-pulmonary-arteries-in-monocrotaline-induced-pulmonary-hypertensive-rats
#10
Zhihong Lin, Zhi Jiang, Xiaodong Huang, Xiaoqi Cai, Huajun Wang, Liangdi Xie
This study examined the effects of preventive atorvastatin (Ator) treatment on vasodilatation of small pulmonary arteries (SPAs) in monocrotaline (MCT)-induced pulmonary hypertensive rats. SD rats were randomly assigned to: normal control (Ctr), pulmonary arterial hypertension (PAH), PAH treated with 5 mg/kg/d Ator (LAtor), or 10 mg/kg/d Ator (HAtor). PAH was induced by MCT injection (40 mg/kg, i.p.). Mean pulmonary artery pressure (mPAP), right ventricular hypertrophy index (RVHI%), endothelium-dependent relaxations (EDdRs), and endothelium-independent relaxations (EDiRs) were determined...
June 19, 2017: Clinical and Experimental Hypertension: CHE
https://www.readbyqxmd.com/read/28628000/epigenetics-inflammation-and-metabolism-in-right-heart-failure-associated-with-pulmonary-hypertension
#11
Nolwenn Samson, Roxane Paulin
Right ventricular failure (RVF) is the most important prognostic factor for both morbidity and mortality in pulmonary arterial hypertension (PAH), but also occurs in numerous other common diseases and conditions, including left ventricle dysfunction. RVF remains understudied compared with left ventricular failure (LVF). However, right and left ventricles have many differences at the morphological level or the embryologic origin, and respond differently to pressure overload. Therefore, knowledge from the left ventricle cannot be extrapolated to the right ventricle...
June 19, 2017: Pulmonary Circulation
https://www.readbyqxmd.com/read/28624812/extracorporeal-shock-wave-treatment-attenuated-left-ventricular-dysfunction-and-remodeling-in-mini-pig-with-cardiorenal-syndrome
#12
Jiunn-Jye Sheu, Hani E E Ali, Ben-Chung Cheng, Hsin-Ju Chiang, Pei-Hsun Sung, Kuan-Hung Chen, Chih-Chao Yang, Yen-Ta Chen, John Y Chiang, Pao-Yuan Lin, Sarah Chua, Han-Tan Chai, Sheng-Ying Chung, Cheuk-Kwan Sun, Hon-Kan Yip
This study tested the hypothesis that extracorporeal shock wave (ECSW) treatment can improve ischemia-induced left ventricular (LV) dysfunction in mini-pig with co-existing chronic kidney disease (CKD). LV ischemia in mini-pigs was induced by applying an ameroid constrictor over mid-left anterior descending artery (LAD), while model of CKD was established by right nephrectomy with partial ligation of left renal arterioles 2 weeks before LAD constriction. Thirty mini-pigs were randomly divided into group 1 (sham-control), group 2 (LV-ischemia), group 3 (LV-ischemia + CKD), Group 4 [LV-ischemia + ECSW (applied 1200 shots at 0...
May 30, 2017: Oncotarget
https://www.readbyqxmd.com/read/28620573/clinical-characteristics-and-outcomes-of-patients-with-ischemic-and-non-ischemic-complete-heart-block
#13
Murtaza Sundhu, Mehmet Yildiz, Mubbasher Syed, Bhavan Shah, Sajjad Gul, Omer Afzal, Lon Castle
INTRODUCTION: Third degree or complete heart block (CHB) is a medical emergency and usually requires permanent pacemaker placement. CHB can be caused by cardiac ischemia or non-ischemic conditions such as infiltrative diseases or fibrosis. The purpose of this study is to identify the baseline clinical characteristics associated with ischemic versus non-ischemic causes of complete heart block and compare their outcomes. MATERIALS AND METHODS: An institutional review broad approval was granted by the Cleveland Clinic Health System...
May 12, 2017: Curēus
https://www.readbyqxmd.com/read/28617969/conditionally-targeted-deletion-of-psen1-leads-to-diastolic-heart-dysfunction
#14
Xiao-Wei Song, Qing-Ning Yuan, Ying Tang, Mi Cao, Ya-Feng Shen, Zhen-Yu Zeng, Chang-Hai Lei, SongHua Li, Xian-Xian Zhao, Yong-Ji Yang
Recently, PSEN1 has been reported to have mutations in dilated cardiomyopathy pedigrees. However, the function and mechanism of PSEN1 in cardiomyopathy remains unresolved. Here, we established 4 types of genetically modified mice to determine the function of PSEN1 in cardiac development and pathology. PSEN1 null mutation resulted in perinatal death, retardation of heart growth, ventricular dilatation, septum defects, and valvular thickening. PSEN1 knockout in adults led to decreased muscle fibers, widened sarcomere Z lines and reduced lengths of sarcomeres in cardiomyocytes...
June 15, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28615692/wnt5a-is-associated-with-right-ventricular-dysfunction-and-adverse-outcome-in-dilated-cardiomyopathy
#15
Aurelija Abraityte, Ida G Lunde, Erik T Askevold, Annika E Michelsen, Geir Christensen, Pål Aukrust, Arne Yndestad, Arnt Fiane, Arne Andreassen, Svend Aakhus, Christen P Dahl, Lars Gullestad, Kaspar Broch, Thor Ueland
The Wingless (Wnt) pathway has been implicated in the pathogenesis of dilated cardiomyopathy (DCM). To explore the role of Wnt modulators Wnt5a and sFRP3 in DCM patients we analyzed the expression of Wnt5a and sFRP3 in plasma and myocardium of DCM patients and evaluated their effects on NFAT luciferase activity in neonatal mouse cardiomyocytes. Elevated circulating Wnt5a (n = 102) was associated with increased pulmonary artery pressures, decreased right ventricular function and adverse outcome, with a stronger association in more severely affected patients...
June 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28612421/melody-valve-within-a-dysfunctional-freestyle-bioprosthesis-yes-you-can-fit-a-round-peg-in-a-calcified-hole
#16
EDITORIAL
Dhaval R Parekh, Zvonimir Krajcer
Transcatheter pulmonary valve implantation (TPVI) within a failed bioprosthetic valve is safe and effective Coronary artery compression is a potential risk, requiring careful preimplantation balloon dilation testing Prestenting is required for TPVI in stentless conduits Improvements in right ventricular volume, pressure, pulmonary stenosis, and regurgitation can be maintained in the intermediate term Long-term risk for Melody valve endocarditis and valve dysfunction necessitates careful monitoring.
June 1, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28612276/clinical-risk-stratification-of-acute-pulmonary-embolism-comparing-the-usefulness-of-cta-obstruction-score-and-pulmonary-perfusion-defect-score-with-dual-energy-ct
#17
Wei-Fang Kong, Yu-Ting Wang, Long-Lin Yin, Hong Pu, Ke-Yan Tao
To compare the ability of CT angiography (CTA) obstruction score and perfusion defect score on dual energy CT perfusion imaging (DEPI) for clinical risk stratification of patients with acute pulmonary embolism (PE). 55 patients diagnosed as acute PE either by CTA or DEPI were retrospectively enrolled. Patients were grouped into high-, intermediate-, and low-risk groups in accordance to the renewed guidelines of 2014. Consistency between DEPI and CTA in diagnosis of PE were assessed. Correlations between CT parameters and right-to-left ventricular (RV/LV) diameter ratio were evaluated...
June 13, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28604759/markers-of-maternal-and-infant-metabolism-are-associated-with-ventricular-dysfunction-in-infants-of-obese-women-with-type-2-diabetes
#18
W Todd Cade, Philip T Levy, Rachel A Tinius, Mehgna D Patel, Swati Choudhry, Mark R Holland, Gautam K Singh, Alison G Cahill
BACKGROUND: To test the hypothesis that infants born to obese women with pregestational type 2 diabetes mellitus (IBDM) have ventricular dysfunction at one month that is associated with markers of maternal lipid and glucose metabolism. METHODS: In a prospective observational study of IBDM (OB+DM, n=25), echocardiography measures of septal, left (LV) and right ventricular (RV) function and structure were compared at one month of age to infants born to OB mothers without DM (OB, n=24), and non-OB without DM (Lean, n=23)...
June 12, 2017: Pediatric Research
https://www.readbyqxmd.com/read/28597497/right-ventricular-dysfunction-in-left-sided-heart-failure-with-preserved-versus-reduced-ejection-fraction
#19
Lena Bosch, Carolyn S P Lam, Lingli Gong, Siew Pang Chan, David Sim, Daniel Yeo, Fazlur Jaufeerally, Kui Toh Gerard Leong, Hean Yee Ong, Tze Pin Ng, Arthur Mark Richards, Fatih Arslan, Lieng H Ling
BACKGROUND: Right ventricular (RV) dysfunction is recognized as a major prognostic factor in left-sided heart failure (HF). However, the relative contribution of RV dysfunction in HF with preserved (HFpEF) vs. reduced ejection fraction (HFrEF) is unclear. METHODS AND RESULTS: Right ventricular longitudinal strain (RVLS), tricuspid annular plane systolic excursion (TAPSE) and pulmonary artery systolic pressure (PASP) were determined by echocardiography in 657 age- and gender-matched groups of patients with HFpEF [left ventricular ejection fraction (LVEF) ≥50%; n=219] and HFrEF (LVEF <50%; n=219) and in controls without HF (n=219) from an Asian population-based cohort study...
June 8, 2017: European Journal of Heart Failure
https://www.readbyqxmd.com/read/28595772/prevention-of-early-complications-and-late-consequences-after-acute-pulmonary-embolism-focus-on-reperfusion-techniques
#20
Stavros V Konstantinides, Stefano Barco
Pulmonary embolism (PE) is a major cause of acute cardiovascular mortality and long-term morbidity. Right ventricular (RV) dysfunction is the key determinant of prognosis in the acute phase of PE, and residual RV dysfunction is associated with the development of post-PE functional impairment, chronic thromboembolic disease, and higher costs of treatment over the long term. Patients with clinically overt RV failure, i.e. hemodynamic collapse at presentation (high-risk PE), necessitate immediate thrombolytic treatment to relieve the obstruction in the pulmonary circulation; surgical or catheter-directed removal of the thrombus can be an alternative option...
June 1, 2017: Thrombosis Research
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