keyword
MENU ▼
Read by QxMD icon Read
search

Left atrium

keyword
https://www.readbyqxmd.com/read/28449532/the-future-of-hybrid-ablation-an-emerging-need-for-an-anticoagulation-protocol-for-thoracoscopic-ablation
#1
EDITORIAL
Pavel Osmancik, Petr Budera
The midterm efficacy of hybrid ablation of atrial fibrillation (AF) reported in recent papers is about 70% in terms of sinus rhythm maintenance without antiarrhythmic drugs. Bearing in mind that the majority of patients enrolled are patients with persistent and long-standing persistent AF, the reported efficacies seem to be very good. Despite the high efficacies, safety remains a critical issue in hybrid, and especially thoracoscopic ablations. The frequency of complications during thoracoscopic ablations is more than 10% in the majority of reports...
March 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28449483/epicardial-left-atrial-appendage-closure-comparison-of-surgical-techniques-in-an-ex-vivo-model
#2
Nikolas Mirow, Sebastian Vogt, Marc Irqsusi, Rainer Moosdorf, Andreas Kirschbaum
BACKGROUND: Formation of clots in the left atrial appendage (LAA) may lead to embolism and consecutive cerebral stroke. This risk is reduced by closure and resection. To address the efficacy of surgical LAA closure, resilience to pneumatic pressure was studied. Different surgical techniques were compared in an experimental model. METHODS: From freshly slaughtered pigs cardiopulmonary preparations were taken. The left atrium was clamped airtight and the LAA was cannulated...
March 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28448402/left-atrium-measurements-via-computed-tomography-pulmonary-angiogram-as-a-predictor-of-diastolic-dysfunction
#3
Adam N Lick, Raman Danrad, David L Smith, Matthew R Lammi
PURPOSE: Left atrium (LA) enlargement on echocardiography may be an indicator of diastolic dysfunction (DD). It is not well known if computed tomography pulmonary angiography (CTPA) can detect DD. METHODS: A total of 127 patients who underwent both CTPA and echo within 48 hours were analyzed retrospectively. Left atrium diameters from CTPA were correlated with echo and evaluated against degrees of DD. Computed tomography pulmonary angiography pulmonary artery (PA)/aorta ratio was analyzed as a tool to detect pulmonary hypertension...
April 26, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28447159/catheter-ablation-of-persistent-atrial-fibrillation-beneficial-effect-of-a%C3%A2-short-term-adjunctive-amiodarone-therapy-on-the-long-term-outcome
#4
Klaus Kettering, Felix Gramley
BACKGROUND: Catheter ablation has become the first line therapy in patients with symptomatic, recurrent, drug-refractory atrial fibrillation. Circumferential pulmonary vein ablation is still the standard approach in these patients. However, the results are not very favorable (especially in patients with persistent atrial fibrillation). Therefore, more complex ablation strategies and the usefulness of (short-term) adjunctive antiarrhythmic drug therapy are a matter of discussion. The aim of this study was to analyze whether short-term amiodarone therapy after catheter ablation (3 months) has a positive effect on the success rates after circumferential pulmonary vein ablation in patients with persistent atrial fibrillation...
April 26, 2017: Herzschrittmachertherapie & Elektrophysiologie
https://www.readbyqxmd.com/read/28446199/different-determinants-of-exercise-capacity-in-hfpef-compared-to-hfref
#5
Arlind Batalli, Pranvera Ibrahimi, Ibadete Bytyçi, Artan Ahmeti, Edmond Haliti, Shpend Elezi, Michael Y Henein, Gani Bajraktari
BACKGROUND: Quality of life is as important as survival in heart failure (HF) patients. Controversies exist with regards to echocardiographic determinants of exercise capacity in HF, particularly in patients with preserved ejection fraction (HFpEF). The aim of this study was to prospectively examine echocardiographic parameters that correlate and predict functional exercise capacity assessed by 6 min walk test (6-MWT) in patients with HFpEF. METHODS: In 111 HF patients (mean age 63 ± 10 years, 47% female), an echo-Doppler study and a 6-MWT were performed in the same day...
April 26, 2017: Cardiovascular Ultrasound
https://www.readbyqxmd.com/read/28445281/relationship-between-the-abnormal-diastolic-vortex-structure-and-impaired-left-ventricle-filling-in-patients-with-hyperthyroidism
#6
Bin-Yu Zhou, Ming-Xing Xie, Jing Wang, Xin-Fang Wang, Qing Lv, Man-Wei Liu, Shuang-Shuang Kong, Ping-Yu Zhang, Jin-Feng Liu
Intraventricular hydrodynamics plays an important role in evaluating cardiac function. Relationship between diastolic vortex and left ventricular (LV) filling is still rarely elucidated. The aim of this study was to evaluate the evolution of vortex during diastole in hyperthyroidism (HT) and explore the alteration of hydromechanics characteristics with sensitive indexes.Forty-three patients diagnosed with HT were classified into 2 groups according to whether myocardial damage existed: simple hyperthyroid group (HT1, n = 21) and thyrotoxic cardiomyopathy (HT2, n = 22)...
April 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28439660/catheter-ablation-of-persistent-atrial-fibrillation-long-term-results-of-circumferential-pulmonary-vein-ablation-in-combination-with-a-linear-lesion-at-the-roof-of-the-left-atrium
#7
Klaus Kettering, Dag-Hau Yim, Caroline Albert, Felix Gramley
BACKGROUND: Catheter ablation has become the first line of therapy in patients with symptomatic, recurrent, drug-refractory atrial fibrillation. However, catheter ablation of persistent atrial fibrillation is still a challenge. Various relatively complex ablation strategies exist and their results are not very favorable. Therefore, the aim of our study was to evaluate a well-defined reasonable approach to catheter ablation of persistent atrial fibrillation. The strategy consisted of a circumferential pulmonary vein ablation in combination with a linear lesion at the roof of the left atrium...
April 24, 2017: Herzschrittmachertherapie & Elektrophysiologie
https://www.readbyqxmd.com/read/28438722/propagation-of-meandering-rotors-surrounded-by-high-dominant-frequency-areas-in-persistent-atrial-fibrillation
#8
João Salinet, Fernando S Schlindwein, Peter Stafford, Tiago P Almeida, Xin Li, Frederique J Vanheusden, María S Guillem, G André Ng
BACKGROUND: identification of arrhythmogenic regions remains a challenge in persistent atrial fibrillation (persAF). Frequency and phase analysis allows identification of potential ablation targets. OBJECTIVE: This study aims to investigate the spatiotemporal association between dominant frequency (DF) and re-entrant phase activation areas. METHODS: Eight persAF patients undergoing first-time catheter ablation procedure were enrolled. A non-contact array catheter was deployed into the left atrium (LA) and 2048 AF electrograms (AEG) were acquired for 15 seconds following ventricular far-field cancellation...
April 21, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28435092/-terpinen-4-ol-changes-intracellular-ca-2-handling-and-induces-pacing-disturbance-in-rat-hearts
#9
Antonio Nei Santana Gondim, Aline Lara, Artur Santos-Miranda, Danilo Roman-Campos, Sandra Lauton-Santos, José Evaldo Rodrigues Menezes-Filho, Carla Maria Lins de Vasconcelos, Eduardo Antonio Conde-Garcia, Silvia Guatimosim, Jader S Cruz
(-)-Terpinen-4-ol is a naturally occurring plant monoterpene and has been shown to have a plethora of biological activities. The objective of this study was to investigate the effects of (-)-terpinen-4-ol on the rat heart, a key player in the control and maintenance of arterial blood pressure. The effects of (-)-terpinen-4-ol on the rat heart were investigated using isolated left atrium isometric force measurements, in vivo electrocardiogram (ECG) recordings, patch clamp technique, and confocal microscopy. It was observed that (-)-terpinen-4-ol reduced contraction force in an isolated left atrium at millimolar concentrations...
April 20, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28434140/radiation-therapy-for-recurrent-cardiac-undifferentiated-pleomorphic-sarcoma-after-three-operations
#10
Kazunobu Hirooka, Masahiro Oonuki, Susumu Manabe, Daisuke Hiraoka, Takashi Yasukawa, Keiko Suzuki
We report the case of a 57-year-old female suffering from recurrent malignant undifferentiated pleomorphic sarcoma of the left atrium. Metastasis to the posterior mediastinum was detected upon first presentation. Incomplete resections were carried out twice before mitral valve replacement was finally performed. The tumor recurred 16 months later and was treated with radiation therapy, which has proved to be effective in bringing about tumor regression for 2 years, to date. The patient has survived for 7 years since the first surgery...
April 22, 2017: General Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28433558/spatial-relationship-of-organized-rotational-and-focal-sources-in-human-atrial-fibrillation-to-autonomic-ganglionated-plexi
#11
Tina Baykaner, Theodoros A Zografos, Junaid A B Zaman, Ioannis Pantos, Mahmood Alhusseini, Rachita Navara, David E Krummen, Sanjiv M Narayan, Demosthenes G Katritsis
BACKGROUND: One approach to improve ablation for atrial fibrillation (AF) is to focus on physiological targets including focal or rotational sources or ganglionic plexi (GP). However, the spatial relationship between these potential mechanisms has never been studied. We tested the hypothesis that rotors and focal sources for AF may co-localize with ganglionated plexi (GP). METHODS: We prospectively identified locations of AF rotors and focal sources, and correlated these to GP sites in 97 consecutive patients (age 59...
April 19, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28432672/para-atrial-non-acute-mediastinal-hematoma-after-left-atrial-maze-procedure-mimicking-tumor-in-a-patient-with-treated-melanoma
#12
G Schaiberger, D Pucar, V Patel, B Bateson, H Williams, W Bates
INTRODUCTION: The Cox Maze III procedure is considered the gold standard open surgical procedure for management of atrial fibrillation. This article outlines a unique case of a para-atrial mediastinal hematoma following a bilateral thoracoscopic left atrial Maze procedure mimicking malignancy. REPORT: A 60-year-old male, with past history of melanoma, underwent bilateral thoracoscopic left atrial mini maze procedure with radiofrequency energy and exclusion of the left atrial appendage...
April 21, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28428444/impact-of-atrial-fibrillation-on-the-clinical-course-of-apical-hypertrophic-cardiomyopathy
#13
Sang-Eun Lee, Jin-Kyu Park, Jae-Sun Uhm, Jong Youn Kim, Hui-Nam Pak, Moon-Hyoung Lee, Boyoung Joung
BACKGROUND: Apical hypertrophic cardiomyopathy (ApHCM) is considered a 'benign' form of hypertrophic cardiomyopathy, with limited data on the long-term outcome. However, the clinical impact of atrial fibrillation (AF) in ApHCM is largely unknown. The hypothesis was that AF is common and has a prognostic implication in ApHCM. METHODS: The occurrence of AF and outcome was assessed in 306 consecutive patients with ApHCM (68% male, 62±11 years). RESULTS: AF occurred in 77 patients with ApHCM (prevalence, 25...
April 20, 2017: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/28427903/atrial-fibrillation-is-associated-with-hypermethylation-in-human-left-atrium-and-treatment-with-decitabine-reduces-atrial-tachyarrhythmias-in-spontaneously-hypertensive-rats
#14
R Doñate Puertas, E Meugnier, C Romestaing, C Rey, E Morel, J Lachuer, N Gadot, A Scridon, C Julien, F Tronc, B Chapuis, C Valla, A Janin, L Pirola, A Méjat, S Rome, P Chevalier
Atrial fibrillation (AF) is the most common cardiac arrhythmia. As the molecular mechanisms underlying the pathology are largely unknown, this cardiac arrhythmia remains difficult to treat. To identify specific molecular actors involved in AF, we have performed a transcriptomic analysis on left atrium (LA) from patients with valvular heart disease with or without AF. We showed that 1627 genes had altered basal expression level in LA tissue of AF patients compared with the control group. The significantly enriched gene ontology biological process "anatomical structure morphogenesis" contained the highest number of genes in line with changes in structure that occur when the human heart remodels following AF development (ie, LA dilatation and interstitial fibrosis)...
March 30, 2017: Translational Research: the Journal of Laboratory and Clinical Medicine
https://www.readbyqxmd.com/read/28427597/intentional-percutaneous-laceration-of%C3%A2-the%C3%A2-anterior-mitral-leaflet-to-prevent%C3%A2-outflow%C3%A2-obstruction-during-transcatheter-mitral-valve-replacement-first-in-human%C3%A2-experience
#15
Vasilis C Babaliaros, Adam B Greenbaum, Jaffar M Khan, Toby Rogers, Dee Dee Wang, Marvin H Eng, William W O'Neill, Gaetano Paone, Vinod H Thourani, Stamatios Lerakis, Dennis W Kim, Marcus Y Chen, Robert J Lederman
OBJECTIVES: This study sought to use a new catheter technique to split the anterior mitral valve leaflet (AML) and prevent iatrogenic left ventricular outflow tract (LVOT) obstruction immediately before transcatheter mitral valve replacement (TMVR). BACKGROUND: LVOT obstruction is a life-threatening complication of TMVR, caused by septal displacement of the AML. METHODS: The procedure was used in patients with severe mitral valve disease and prohibitive surgical risk...
April 24, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28427378/assessment-of-cardiac-function-in-children-with-congenital-adrenal-hyperplasia-a-case-control-study-in-cameroon
#16
J Tony Nengom, S Sap Ngo Um, D Chelo, R Mbono Betoko, J Boombhi, F Mouafo Tambo, A Chiabi, S Kingue, P Koki Ndombo
BACKGROUND: High level of androgens found in congenital adrenal hyperplasia (CAH) seems to have a deleterious effect on heart function. We therefore evaluate cardiac function of children with CAH in comparison with a healthy group. METHODS: We carried out a case-control study in the single endocrinology unit of the Mother and Child Center of Chantal Biya's Foundation. Cases were matched for age and genotypic sex to 2 healthy controls. We analyzed the ejection fraction (LVEF), fractional shortening and left ventricular mass; output and cardiac index; E and A waves velocities, E/A ratio and the mitral deceleration time and diameter of the left atrium; tricuspid annular plane systolic excursion and pulmonary artery systolic pressure were also measured...
April 20, 2017: BMC Pediatrics
https://www.readbyqxmd.com/read/28424659/online-measurement-of-microembolic-signal-burden-by-transcranial-doppler-during-catheter-ablation-for-atrial-fibrillation-results-of-a-multicenter-trial
#17
Christian von Bary, Thomas Deneke, Thomas Arentz, Anja Schade, Heiko Lehrmann, Sabine Fredersdorf, Dobri Baldaranov, Lars Maier, Felix Schlachetzki
INTRODUCTION: Left atrial pulmonary vein isolation (PVI) is an accepted treatment option for patients with symptomatic atrial fibrillation (AF). This procedure can be complicated by stroke or silent cerebral embolism. Online measurement of microembolic signals (MESs) by transcranial Doppler (TCD) may be useful for characterizing thromboembolic burden during PVI. In this prospective multicenter trial, we investigated the burden, characteristics, and composition of MES during left atrial catheter ablation using a variety of catheter technologies...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28424358/ultrasound-assessment-of-umbilical-venous-catheter-migration-in-preterm-infants-a-prospective-study
#18
Jan Franta, Andrei Harabor, Amuchou S Soraisham
OBJECTIVES: To evaluate the umbilical venous catheter (UVC) tip position by ultrasound and compare it with standard radiograph findings and to examine the catheter tip migration rates during the first week of life. DESIGN: Prospective observational study of inborn preterm infants who had an UVC placed and its position radiographically confirmed. The first ultrasound was done on UVC placement at median (IQR) age of 2 hours (1-4) and follow-up scans at a median (IQR) age of 34 hours (27-44 hours), 77 hours (70-94 hours) and 6 days (5-7 days) after insertion...
May 2017: Archives of Disease in Childhood. Fetal and Neonatal Edition
https://www.readbyqxmd.com/read/28423119/importance-of-serca2a-on-early-isolated-diastolic-dysfunction-induced-by-supravalvular-aortic-stenosis-in-rats
#19
C F S M P Silveira, D H S Campos, P P Freire, A F Deus, K Okoshi, C R Padovani, A C Cicogna
Cardiac remodeling is defined as changes in shape and function of the heart in response to aggression (pressure overload). The sarcoplasmic reticulum calcium ATPase cardiac isoform 2a (SERCA2a) is a known factor that influences function. A wide spectrum of studies report a decrease in SERCA2a in heart failure, but none evaluate it's the role in early isolated diastolic dysfunction in supravalvular aortic stenosis (AoS). Our hypothesis was that SERCA2a participates in such dysfunction. Thirty-day-old male Wistar rats (60-80 g) were divided into AoS and Sham groups, which were submitted to surgery with or without aorta clipping, respectively...
April 13, 2017: Brazilian Journal of Medical and Biological Research, Revista Brasileira de Pesquisas Médicas e Biológicas
https://www.readbyqxmd.com/read/28422827/a-case-of-a-resected-benign-myxoma-like-hemorrhagic-cyst-which-later-recurred-as-undifferentiated-pleomorphic-sarcoma-in-the-left-atrium
#20
Eunju Kim, Seo-Won Choi, Daniel Min, Sang Hoon Kim, Woo-In Yang, Jae Youn Moon, Jung Hoon Sung, In Jai Kim, Sang-Wook Lim, Dong-Hun Cha, Byung Moon, Sang-Ho Cho, Won-Jang Kim
RATIONALE: An intracardiac cystic mass is a rare type of mass found in the left atrium. The differential diagnosis of an intracardiac cystic mass includes hydatid cysts, bronchogenic cysts, intracardiac varices, and hemorrhages in some tumor types, including myxoma. PATIENT CONCERNS: We present the case of a 68-year-old woman who presented with episodic dyspnea. DIAGNOSES-INTERVENTIONS-OUTCOMES: Transthoracic echocardiography (TTE) revealed the presence of a left atrial mass mimicking myxoma...
April 2017: Medicine (Baltimore)
keyword
keyword
7148
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"