keyword
MENU ▼
Read by QxMD icon Read
search

Cardiac mapping

keyword
https://www.readbyqxmd.com/read/29042470/comparison-between-prone-and-upright-imaging-of-the-inferior-wall-using-201-tlcl-myocardial-perfusion-single-photon-emission-computed-tomography
#1
Koji Nakaya, Masahisa Onoguchi, Yoshihiro Nishimua, Keisuke Kiso, Hideki Otsuka, Yoshifumi Nouno, Takayuki Shibutani, Eisuke Yasuda
Background: Prone single photon emission computed tomography (SPECT) is suitable for evaluating the cardiac inferior wall as it suppresses attenuation artifacts from the diaphragm. The solid-state dedicated cardiac camera (D-SPECT) allows upright imaging, which can also be used to avoid attenuation artifacts from the diaphragm. We compared prone and upright imaging for inferior wall evaluation using (201)TlCl myocardial perfusion SPECT. Methods: The study targeted 45 patients. The prone imaging group included 23 subjects who underwent additional prone imaging because supine imaging indicated that the inferior wall had reduced uptake...
October 17, 2017: Journal of Nuclear Medicine Technology
https://www.readbyqxmd.com/read/29042091/effects-of-renal-denervation-on-coronary-flow-reserve-and-forearm-dilation-capacity-in-patients-with-treatment-resistant-hypertension-a-randomized-double-blinded-sham-controlled-clinical-trial
#2
Morten Engholm, Jannik B Bertelsen, Ole N Mathiassen, Hans E Bøtker, Henrik Vase, Christian D Peters, Jesper N Bech, Niels H Buus, Anne P Schroeder, Hans Rickers, Klavs W Hansen, Per L Poulsen, Anne Kaltoft, Kent L Christensen
BACKGROUND: Microvascular impairment is well documented in hypertension. We investigated the effect of renal sympathetic denervation (RDN) on cardiac and peripheral microvasculature in patients with treatment-resistant essential hypertension (TRH). METHODS: A randomized, single centre, double-blinded, sham-controlled clinical trial. Fifty-eight patients with TRH (ambulatory systolic BP (ASBP) ≥ 145mmHg) despite stable treatment were randomized to RDN or SHAM. RDN was performed with the unipolar Medtronic Flex catheter...
October 1, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/29035207/novel-quantitative-analytical-approaches-for-rotor-identification-and-associated-implications-for-mapping
#3
Elizabeth M Annoni, Shivaram Poigai Arunachalam, Suraj Kapa, Siva K Mulpuru, Paul A Friedman, Elena G Talkachova
OBJECTIVE: Clinical studies identifying rotors confirming these sites for ablation in treating cardiac arrhythmias have had inconsistent results with the current analysis techniques available. The aim of this study is to evaluate four new signal analysis approaches - multiscale frequency (MSF), Shannon entropy (SE), Kurtosis (Kt), and multiscale entropy (MSE) - in their ability to identify the pivot point of rotors. METHODS: Optical mapping movies of ventricular tachycardia were used to evaluate the performance and robustness of SE, Kt, MSF and MSE techniques with respect to several clinical limitations: decreased time duration, reduced spatial resolution, and the presence of meandering rotors...
October 16, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/29030342/the-sex-specific-impact-of-aging-on-the-blood-pressure-response-to-exercise
#4
Joel D Trinity, Gwenael Layec, Corey R Hart, Russell S Richardson
An exaggerated blood pressure (BP) response to exercise has been linked to cardiovascular disease (CVD), but little is known about the impact of age and sex on this response. Therefore, this study examined the hemodynamic and skeletal muscle metabolic response to dynamic plantar flexion exercise, at 40% of WRmax, in 40 physical activity-matched young (n=20, 23±1 yr) and old (n=20, 73±2 yr), equally distributed, male and female subjects. Central hemodynamics and BP (finometer), popliteal artery (PA) blood flow (Doppler ultrasound), and skeletal muscle metabolism (phosphorous magnetic resonance spectroscopy, (31)P-MRS) were measured during 5 mins of plantar flexion exercise...
October 13, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/29029143/genome-wide-analysis-of-genetic-risk-factors-for-rheumatic-heart-disease-in-aboriginal-australians-provides-support-for-pathogenic-molecular-mimicry
#5
Lesley-Ann Gray, Heather A D'Antoine, Steven Y C Tong, Melita McKinnon, Dawn Bessarab, Ngaire Brown, Bo Reményi, Andrew Steer, Genevieve Syn, Jenefer M Blackwell, Michael Inouye, Jonathan R Carapetis
Background: Rheumatic heart disease (RHD) following Group A Streptococcus (GAS) infections is heritable and prevalent in Indigenous populations. Molecular mimicry between human and GAS proteins triggers pro-inflammatory cardiac valve-reactive T-cells. Methods: Genome-wide genetic analysis was undertaken in 1263 Aboriginal Australians (398 RHD cases; 865 controls). Single nucleotide polymorphisms (SNPs) were genotyped using Illumina HumanCoreExome BeadChips. Direct typing and imputation was used to fine-map the human leukocyte antigen (HLA) region...
September 26, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29028925/influence-of-bayesian-optimization-on-the-performance-of-propofol-target-controlled-infusion
#6
J P van den Berg, D J Eleveld, T De Smet, A V M van den Heerik, K van Amsterdam, B J Lichtenbelt, T W L Scheeren, A R Absalom, M M R F Struys
Background: Target controlled infusion (TCI) systems use population-based pharmacokinetic (PK) models that do not take into account inter-individual residual variation. This study compares the bias and inaccuracy of a population-based vs a personalized TCI propofol titration using Bayesian adaptation. Haemodynamic and hypnotic stability, and the prediction probability of alternative PK models, was studied. Methods: A double-blinded, prospective randomized controlled trial of 120 subjects undergoing cardiac surgery was conducted...
October 3, 2017: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/29027210/oedema-fibrosis-in-duchenne-muscular-dystrophy-role-of-cardiovascular-magnetic-resonance-imaging
#7
REVIEW
Sophie Mavrogeni, Antigoni Papavasiliou, Katerina Giannakopoulou, George Markousis-Mavrogenis, Maria Roser Pons, Evangelos Karanasios, Ioannis Nikas, George Papadopoulos, Genovefa Kolovou, George P Chrousos
Duchenne muscular dystrophy (DMD) is an X-linked muscle disorder characterized by progressive, irreversible loss of cardiac and skeletal muscular function. Muscular enlargement in DMD is attributed to oedema, due to the increased cytoplasmic Na+ concentration. The aim in this review is to present the current experience and emphasize the role of cardiovascular magnetic resonance (CMR) in the diagnosis of this condition. DMD patients' survival depends on ventilatory assistance, as respiratory muscle dysfunction was the most common cause of death in the past...
October 13, 2017: European Journal of Clinical Investigation
https://www.readbyqxmd.com/read/29024200/novel-automated-point-collection-software-facilitates-rapid-high-density-electroanatomical-mapping-with-multiple-catheter-types
#8
Leon M Ptaszek, Boyce Moon, Guy Rozen, Srijoy Mahapatra, Moussa Mansour
INTRODUCTION: Manual, point-by-point electroanatomical mapping requires the operator to directly evaluate each point during map construction. Consequently, point collection can be a slow process. An automated 3D mapping system was developed with the goal of improving key mapping metrics, including map completion time and point density. METHODS: Automated 3D mapping software that includes morphology and cycle length discrimination functions for surface and intracardiac electrograms was developed...
October 12, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29021462/novel-imaging-of-hypoglycemia-induced-myocardial-abnormality-by-cardiac-magnetic-resonance-t1-mapping
#9
Taisuke Nakade, Hitoshi Sumida, Kazuhiro Katahira, Kenro Nishida
No abstract text is available yet for this article.
October 11, 2017: Internal Medicine
https://www.readbyqxmd.com/read/29021269/-road-map-to-improving-enrollment-in-cardiac-rehabilitation-identifying-barriers-and-evaluating-alternatives
#10
EDITORIAL
James P Pirruccello, Kathleen Traynor, Krishna G Aragam
No abstract text is available yet for this article.
October 11, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29020341/percutaneous-short-term-active-mechanical-support-devices-in-cardiogenic-shock-a-systematic-review-and-collaborative-meta-analysis-of-randomized-trials
#11
Holger Thiele, Alexander Jobs, Dagmar M Ouweneel, Jose P S Henriques, Melchior Seyfarth, Steffen Desch, Ingo Eitel, Janine Pöss, Georg Fuernau, Suzanne de Waha
Aims: Evidence on the impact on clinical outcome of active mechanical circulatory support (MCS) devices in cardiogenic shock (CS) is scarce. This collaborative meta-analysis of randomized trials thus aims to investigate the efficacy and safety of percutanzeous active MCS vs. control in CS. Methods and results: Randomized trials comparing percutaneous active MCS to control in patients with CS were identified through searches of medical literature databases. Risk ratios (RR) and 95% confidence intervals (95% CI) were calculated to analyse the primary endpoint of 30-day mortality and device-related complications including bleeding and leg ischaemia...
July 7, 2017: European Heart Journal
https://www.readbyqxmd.com/read/29018519/limitations-and-challenges-in-mapping-ventricular-tachycardia-new-technologies-and-future-directions
#12
Adam J Graham, Michele Orini, Pier D Lambiase
Recurrent episodes of ventricular tachycardia in patients with structural heart disease are associated with increased mortality and morbidity, despite the life-saving benefits of implantable cardiac defibrillators. Reducing implantable cardiac defibrillator therapies is important, as recurrent shocks can cause increased myocardial damage and stunning, despite the conversion of ventricular tachycardia/ventricular fibrillation. Catheter ablation has emerged as a potential therapeutic option either for primary or secondary prevention of these arrhythmias, particularly in post-myocardial infarction cases where the substrate is well defined...
August 2017: Arrhythmia & Electrophysiology Review
https://www.readbyqxmd.com/read/29016599/coronary-collateralization-shows-sex-and-racial-ethnic-differences-in-obstructive-artery-disease-patients
#13
Zhi Liu, Margaret A Pericak-Vance, Pascal Goldschmidt-Clermont, David Seo, Liyong Wang, Tatjana Rundek, Gary W Beecham
BACKGROUND: Coronary collateral circulation protects cardiac tissues from myocardial infarction damage and decreases sudden cardiac death. So far, it is unclear how coronary collateralization varies by race-ethnicity groups and by sex. METHODS: We assessed 868 patients with obstructive CAD. Patients were assessed for collateral grades based on Rentrop grading system, as well as other covariates. DNA samples were genotyped using the Affymetrix 6.0 genotyping array...
2017: PloS One
https://www.readbyqxmd.com/read/28994676/does-bilevel-positive-airway-pressure-improve-outcome-of-acute-respiratory-failure-after-open-heart-surgery
#14
Ahmed Said Elgebaly
BACKGROUND: Respiratory failure is of concern in the postoperative period after cardiac surgeries. Invasive ventilation (intermittent positive pressure ventilation [IPPV]) carries the risks and complications of intubation and mechanical ventilation (MV). AIMS: Noninvasive positive pressure ventilation (NIPPV) is an alternative method and as effective as IPPV in treating insufficiency of respiration with less complications and minimal effects on respiratory and hemodynamic parameters next to open-heart surgery...
October 2017: Annals of Cardiac Anaesthesia
https://www.readbyqxmd.com/read/28993117/getting-to-the-heart-of-the-matter-what-is-the-landscape-of-exercise-rehabilitation-for-people-with-heart-failure-in-australia
#15
Simon Miller, Allison Mandrusiak, Julie Adsett
BACKGROUND: The benefits of exercise rehabilitation for people with heart failure (HF) are well established. In Australia, little is known about how the guidelines around exercise rehabilitation for people with HF are being implemented in clinical practice. Furthermore, it is unknown what organisational barriers are faced in providing exercise rehabilitation programs for this population. The aim of this study is to provide an updated review of exercise rehabilitation services for people with HF in Australia and to identify perceived organisational barriers to providing these services...
September 25, 2017: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/28992817/clinical-recommendations-for-cardiovascular-magnetic-resonance-mapping-of-t1-t2-t2-and-extracellular-volume-a-consensus-statement-by-the-society-for-cardiovascular-magnetic-resonance-scmr-endorsed-by-the-european-association-for-cardiovascular-imaging-eacvi
#16
REVIEW
Daniel R Messroghli, James C Moon, Vanessa M Ferreira, Lars Grosse-Wortmann, Taigang He, Peter Kellman, Julia Mascherbauer, Reza Nezafat, Michael Salerno, Erik B Schelbert, Andrew J Taylor, Richard Thompson, Martin Ugander, Ruud B van Heeswijk, Matthias G Friedrich
Parametric mapping techniques provide a non-invasive tool for quantifying tissue alterations in myocardial disease in those eligible for cardiovascular magnetic resonance (CMR). Parametric mapping with CMR now permits the routine spatial visualization and quantification of changes in myocardial composition based on changes in T1, T2, and T2*(star) relaxation times and extracellular volume (ECV). These changes include specific disease pathways related to mainly intracellular disturbances of the cardiomyocyte (e...
October 9, 2017: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/28992627/h3-relaxin-protects-against-myocardial-injury-in-experimental-diabetic-cardiomyopathy-by-inhibiting-myocardial-apoptosis-fibrosis-and-inflammation
#17
Xiaohui Zhang, Liya Pan, Kelaier Yang, Yu Fu, Yue Liu, Jinyu Chi, Xin Zhang, Siting Hong, Xiao Ma, Xinhua Yin
BACKGROUND/AIMS: Apoptosis, fibrosis and NLRP3 inflammasome activation are involved in the development of diabetic cardiomyopathy (DCM). Human recombinant relaxin-3 (H3 relaxin) is a novel bioactive peptide that inhibits cardiac injury; however, whether H3 relaxin prevents cardiac injury in rats with DCM and the underlying mechanisms are unknown. METHODS: To investigate the effect of H3 relaxin on DCM, we performed a study using H3 relaxin treatment in male Sprague-Dawley (SD) rats with streptozotocin (STZ)-induced diabetes (DM)...
October 9, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28989072/pentoxifylline-treatment-enhances-antihypertensive-activity-of-captopril-through-hemorheological-improvement-in-spontaneously-hypertensive-rats-during-development-of-arterial-hypertension
#18
Mark B Plotnikov, Alexander Y Shamanaev, Oleg I Aliev, Anastasia V Sidekhmenova, Anna M Anishchenko, Alexander M Arkhipov
The rheological properties of blood play a significant role in the onset and progression of arterial hypertension. The aim of our work was to evaluate the effect of the angiotensin-converting enzyme inhibitor captopril (20 mg/kg/d), pentoxifylline (PTX; 100 mg/kg/d), and the combination of captopril + PTX (20 + 100 mg/kg/d) on the hemodynamic and hemorheological parameters in spontaneously hypertensive rats (SHRs) during the development of arterial hypertension. In the group of animals that received captopril, the mean arterial pressure (MAP) was significantly lower by 30% due to a decrease in cardiac output of 23% and in total peripheral resistance (TPR) of 26% compared with the control group, whereas blood viscosity did not change significantly...
September 27, 2017: Journal of the American Society of Hypertension: JASH
https://www.readbyqxmd.com/read/28988690/impact-of-number-of-co-existing-rotors-and-inter-electrode-distance-on-accuracy-of-rotor-localization
#19
Konstantinos N Aronis, Hiroshi Ashikaga
BACKGROUND: Conflicting evidence exists on the efficacy of focal impulse and rotor modulation on atrial fibrillation ablation. A potential explanation is inaccurate rotor localization from multiple rotors coexistence and a relatively large (9-11mm) inter-electrode distance (IED) of the multi-electrode basket catheter. METHODS AND RESULTS: We studied a numerical model of cardiac action potential to reproduce one through seven rotors in a two-dimensional lattice. We estimated rotor location using phase singularity, Shannon entropy and dominant frequency...
September 1, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28986814/effect-of-shen-fu-injection-on-hemodynamics-in-early-volume-resuscitation-treated-septic-shock-patients
#20
Kai-Liang Fan, Jun-Hui Wang, Li Kong, Fei-Hu Zhang, Hao Hao, Hao Zhao, Zheng-Yun Tian, Ming-Xin Yin, Hua Fang, Hui-Hui Yang, Yang Liu
OBJECTIVE: To investigate the hemodynamic effect of Shen-Fu Injection (, SFI) in early volume resuscitation treated septic shock patients by monitoring pulse indicator continuous cardiac output (PICCO). METHODS: All septic shock patients admitted in the Intensive Care Unit of the Affiliated Hospital of Shandong University of Traditional Chinese Medicine from January 1st, 2014 to December 31th, 2015, were reviewed, and totally 65 were enrolled in this study. They were assigned to SFI group (33 cases) and control group (32 cases)...
October 6, 2017: Chinese Journal of Integrative Medicine
keyword
keyword
108474
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"