keyword
MENU ▼
Read by QxMD icon Read
search

Atrial and ventricles pressure

keyword
https://www.readbyqxmd.com/read/29145451/stromal-interaction-molecule-1-haploinsufficiency-causes-maladaptive-response-to-pressure-overload
#1
Takayoshi Ohba, Hiroyuki Watanabe, Manabu Murakami, Kenji Iino, Takeshi Adachi, Yoshihiro Baba, Tomohiro Kurosaki, Kyoichi Ono, Hiroshi Ito
Stromal interaction molecule 1 (STIM1), an endo/sarcoplasmic reticulum Ca2+ sensor, has been shown to control a Ca2+-dependent signal that promotes cardiac hypertrophy. However, whether STIM1 has adaptive role that helps to protect against cardiac overload stress remains unknown. We hypothesized that STIM1 deficiency causes a maladaptive response to pressure overload stress. We investigated STIM1 heterozygous KO (STIM1+/-) mice hearts, in which STIM1 protein levels decreased to 27% of wild-type (WT) with no compensatory increase in STIM2...
2017: PloS One
https://www.readbyqxmd.com/read/29139031/in-vivo-analysis-of-the-anti-atrial-fibrillatory-proarrhythmic-and-cardiodepressive-profiles-of-dronedarone-as-a-guide-for-safety-pharmacological-evaluation-of-antiarrhythmic-drugs
#2
Yoshiyuki Motokawa, Yuji Nakamura, Mihoko Hagiwara-Nagasawa, Ai Goto, Koki Chiba, Nur Jaharat Lubna, Hiroko Izumi-Nakaseko, Kentaro Ando, Atsuhiko T Naito, Hiroshi Yamazaki, Atsushi Sugiyama
Anti-atrial fibrillatory, proarrhythmic and cardiodepressive profiles of dronedarone were analyzed using the halothane-anesthetized beagle dogs (n = 4) to create a standard protocol for clarifying both efficacy and adverse effects of anti-atrial fibrillatory drugs. Intravenous administration of dronedarone hydrochloride in doses of 0.3 and 3 mg/kg over 30 s attained the peak plasma concentrations of 61 and 1248 ng/mL, respectively, reflecting sub- to supra-therapeutic ones. The low dose decreased the left ventricular contraction and mean blood pressure, which were enhanced at the high dose...
November 14, 2017: Cardiovascular Toxicology
https://www.readbyqxmd.com/read/29119005/differences-in-left-ventricular-functional-adaptation-to-arterial-stiffness-and-neurohormonal-activation-in-patients-with-hypertension-a-study-with-two-dimensional-layer-specific-speckle-tracking-echocardiography
#3
Darae Kim, Chi Young Shim, Geu-Ru Hong, Sungha Park, InJeong Cho, Hyuk-Jae Chang, Jong-Won Ha, Namsik Chung
Background: Arterial stiffness increases pressure load to the left ventricle (LV), leading to LV hypertrophy and subendocardial ischemia. Neurohormones stimulate myocardial fibrosis and LV dysfunction. We aimed to explore the associations of arterial stiffness and plasma aldosterone with multi-directional, layer-specific LV, and left atrial (LA) mechanical function in hypertensive patients. Methods: Layer-specific LV global longitudinal strain (GLS-trans, GLS-endo, GLS-epi), global circumferential strain (GCS-trans, GCS-endo, GCS-epi), LV torsional parameters, and LA global longitudinal strain (LA GLS) were analyzed by two-dimensional speckle tracking echocardiography in 195 hypertensive patients (110 men, mean age 55 years)...
2017: Clinical Hypertension
https://www.readbyqxmd.com/read/29098525/prognostic-value-of-real-time-three-dimensional-echocardiography-compared-to-two-dimensional-echocardiography-in-patients-with-systolic-heart-failure
#4
Frederico J N Mancuso, Valdir A Moises, Dirceu R Almeida, Dalva Poyares, Luciana J Storti, Flavio S Brito, Sergio Tufik, Angelo A V de Paola, Antonio C C Carvalho, Orlando Campos
Heart failure (HF) is associated with morbidity and mortality. Real-time three-dimensional echocardiography (RT3DE) may offer additional prognostic data in patients with HF. The study aimed to evaluate the prognostic value of real-time three-dimensional echocardiography (RT3DE). This is a prospective study that included 89 patients with HF and left ventricular ejection fraction (LVEF) < 0.50 who were followed for 48 months. Left atrium and ventricular volumes and functions were evaluated by RT3DE. TDI and two-dimensional echocardiography parameters were also obtained...
November 2, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/29098508/pharmacological-heart-rate-lowering-in-patients-with-a-preserved-ejection-fraction-review-of-a-failing-concept
#5
REVIEW
Markus Meyer, Mehdi Rambod, Martin LeWinter
Epidemiological studies have demonstrated that high resting heart rates are associated with increased mortality. Clinical studies in patients with heart failure and reduced ejection fraction have shown that heart rate lowering with beta-blockers and ivabradine improves survival. It is therefore often assumed that heart rate lowering is beneficial in other patients as well. Here, we critically appraise the effects of pharmacological heart rate lowering in patients with both normal and reduced ejection fraction with an emphasis on the effects of pharmacological heart rate lowering in hypertension and heart failure...
November 3, 2017: Heart Failure Reviews
https://www.readbyqxmd.com/read/29092113/progression-of-tricuspid-regurgitation-after-mitral-valve-replacement-for-rheumatic-heart-disease
#6
Ho H Q Tri, Pham N Vinh
BACKGROUND: Progression of tricuspid regurgitation (TR) may occur after mitral valve replacement (MVR). The study aim was to define the independent predictors for new severe TR after MVR to treat rheumatic heart disease. METHODS: A total of 413 patients (177 men, 236 women; mean age 40.9 ± 9.2 years) with rheumatic heart disease undergoing MVR without concomitant tricuspid valve repair at the authors' institute between 1995 and 2005, who did not have preoperative severe TR, were followed for at least one year postoperatively...
May 2017: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/29090353/rapid-improvement-of-pulmonary-functions-in-children-after-transcatheter-closure-of-an-atrial-septal-defect
#7
Serkan F Çelik, Cemşit Karakurt, Nurdan Yıldırım Acar, Elif Çelik
There are very few studies in the literature on respiratory system functions and complications of children with an atrial septal defect (ASD). The aim of this study is to investigate the pulmonary functions and pulmonary complications before and after transcatheter closure in children with an ASD. In this study, pulmonary function test parameters of 30 ASD patients between 5 and 18 years of age who were eligible to be treated by transcatheter ASD closure were compared with 30 healthy children. The patients undergoing transcatheter ASD closure received pulmonary function tests (PFT) at baseline (1 day before ASD closure), and 3 months after the procedure...
October 31, 2017: Pediatric Cardiology
https://www.readbyqxmd.com/read/29076284/right-ventricular-speckle-tracking-assessment-for-differentiation-of-pressure-versus-volume-overloaded-right-ventricle
#8
Anna Werther Evaldsson, Annika Ingvarsson, Johan Waktare, Gustav J Smith, Ulf Thilén, Martin Stagmo, Anders Roijer, Goran Rådegran, Carl Meurling
BACKGROUND: Right ventricular (RV) dysfunction may be caused by either pressure or volume overload. RV function is conventionally assessed with echocardiography using tricuspid annular plane systolic excursion (TAPSE), RV fractional area change (RVFAC), tricuspid lateral annular systolic velocity (S') and RV index of myocardial performance (RIMP). The purpose of this study was to evaluate whether RV global longitudinal strain (RVGLS) and RV-free wall strain (RV-free) could add additional information to differentiate these two causes of RV overload...
October 26, 2017: Clinical Physiology and Functional Imaging
https://www.readbyqxmd.com/read/29072062/morpho-functional-cardiovascular-adaptation-in-hypertensive-patients-two-dimensional-speckle-tracking-echocardiographic-study
#9
Ines P Monte, Chiara DI Benedetto, Filippo A Atanasio, Valentina Losi, Salvatore Licciardi, Corrado Tamburino
BACKGROUND: Twenty-four-hour Blood Pressure (BP) variability is an important predictor of organ damage and cardiovascular events. Although epidemiological data are widely based on evaluation of office (Clinic) BP, 24-hour Ambulatory BP monitoring (ABPM) accurately assess the severity of hypertension to predict cardiovascular events in hypertensive patients, because it more accurately reflects BP load on heart and blood vessels. Conventional transthoracic echocardiography (TTE), such as M-mode and two-dimensional (2D), and more advanced techniques, such as tissue Doppler imaging (TDI) and speckle tracking echocardiography (STE), are used to identify pathological changes of the hypertensive heart disease...
October 25, 2017: Minerva Cardioangiologica
https://www.readbyqxmd.com/read/29056259/relationship-between-left-ventricle-position-and-haemodynamic-parameters-during-cardiopulmonary-resuscitation-in-a-pig-model
#10
Yong Hun Jung, Kyung Woon Jeung, Dong Hun Lee, Young Won Jeong, Sung Min Lee, Byung Kook Lee, In Seok Jeong, Sang-Kwon Lee, Jihye Choi
BACKGROUND: From the viewpoint of cardiac pump theory, the area of the left ventricle (LV) subjected to compression increases as the LV lies closer to the sternum, possibly resulting in higher blood flow in patients with LV closer to the sternum. However, no study has evaluated LV position during cardiac arrest or its relationship with haemodynamic parameters during cardiopulmonary resuscitation (CPR). The objectives of this study were to determine whether the position of the LV relative to the anterior-posterior axis representing the direction of chest compression shifts during cardiac arrest and to examine the relationship between LV position and haemodynamic parameters during CPR...
September 24, 2017: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/29018164/termination-of-vernakalant-resistant-atrial-fibrillation-by-inhibition-of-small-conductance-ca-2-activated-k-channels-in-pigs
#11
Jonas Goldin Diness, Lasse Skibsbye, Rafel Simó-Vicens, Joana Larupa Santos, Pia Lundegaard, Carlotta Citerni, Daniel Rafael Peter Sauter, Sofia Hammami Bomholtz, Jesper Hastrup Svendsen, Søren-Peter Olesen, Ulrik S Sørensen, Thomas Jespersen, Morten Grunnet, Bo Hjorth Bentzen
BACKGROUND: Evidence has emerged that small-conductance Ca(2+)-activated K(+) (SK) channels constitute a new target for treatment of atrial fibrillation (AF). SK channels are predominantly expressed in the atria as compared with the ventricles. Various marketed antiarrhythmic drugs are limited by ventricular adverse effects and efficacy loss as AF progresses. METHODS AND RESULTS: A total of 43 pigs were used for the studies. AF reversion in conscious long-term tachypaced pigs: Pigs were subjected to atrial tachypacing (7 Hz) until they developed sustained AF that could not be reverted by vernakalant 4 mg/kg (18...
October 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/28992750/acute-hypotension-after-mitraclip-implantation-due-to-acute-left-ventricular-failure
#12
Adam A Dalia, Michael Essandoh
The MitraClip is a percutaneously implanted device approved for the treatment of symptomatic organic mitral regurgitation in poor surgical candidates. Despite its proven efficacy and safety for mitral regurgitation treatment, the MitraClip may unmask the true afterload of the left ventricle by removing the low-pressure left atrial system and may cause acute left ventricular systolic failure (afterload mismatch). Rapid diagnosis and treatment of afterload mismatch is crucial to ensure optimal patient outcomes...
October 1, 2017: Seminars in Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/28958332/protein-phosphatase-inhibitor-1-gene%C3%A2-therapy-in-a-swine-model-of-nonischemic%C3%A2-heart-failure
#13
Shin Watanabe, Kiyotake Ishikawa, Kenneth Fish, Jae Gyun Oh, Lukas J Motloch, Erik Kohlbrenner, Philyoung Lee, Chaoqin Xie, Ahyoung Lee, Lifan Liang, Changwon Kho, Lauren Leonardson, Maritza McIntyre, Scott Wilson, R Jude Samulski, Evangelia G Kranias, Thomas Weber, Fadi G Akar, Roger J Hajjar
BACKGROUND: Increased protein phosphatase-1 in heart failure (HF) induces molecular changes deleterious to the cardiac cell. Inhibiting protein phosphatase-1 through the overexpression of a constitutively active inhibitor-1 (I-1c) has been shown to reverse cardiac dysfunction in a model of ischemic HF. OBJECTIVES: This study sought to determine the therapeutic efficacy of a re-engineered adenoassociated viral vector carrying I-1c (BNP116.I-1c) in a preclinical model of nonischemic HF, and to assess thoroughly the safety of BNP116...
October 3, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28951773/new-insights-and-new-hope-for-pulmonary-arterial-hypertension-natriuretic-peptides-clearance-receptor-as-a-novel-therapeutic-target-for-a-complex-disease
#14
Emmanuel Eroume-A Egom, Tiam Feridooni, Rebabonye B Pharithi, Barkat Khan, Haaris A Shiwani BSc, Vincent Maher, Yassine El Hiani, Robert A Rose, Kishore Bs Pasumarthi, Hilaire A Ribama
BACKGROUND: Pulmonary Arterial Hypertension (PAH) is a deadly and disabling disease for which there is no marketed drug that addresses the underlying disease mechanism and targets to cure patients. The lack of understanding of the disease mechanism represents the main challenges in developing curative therapies. We here report, for the first time, that mice lacking natriuretic peptides clearance receptor develop PAH. METHODS AND RESULTS: Initial studies assessed cardiac structure and function in NPR-C(+/+) (wild type) and age matched, littermate NPR-C(-/-) mice by echocardiography...
2017: International Journal of Physiology, Pathophysiology and Pharmacology
https://www.readbyqxmd.com/read/28912039/acquired-heart-disease-superimposed-on-congenital-heart-disease
#15
D Luke Glancy
A 50-year-old man with a murmur since birth developed systemic arterial hypertension as an adult. He came to the hospital because of dyspnea. He had a pulmonic valve ejection click and a murmur of pulmonic stenosis. His echocardiogram showed biventricular hypertrophy, a flat ventricular septum, a D-shaped left ventricle, systolic doming of the pulmonic valve, and Doppler evidence of a 70 mm Hg peak systolic pressure gradient across the pulmonic valve and a peak right ventricular systolic pressure of 100 mm Hg...
November 15, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28860791/soluble-st2-correlates-with-some-indicators-of-right-ventricular-function-in-hypertensive-heart-failure
#16
Dike B Ojji, Sandrine Lecour, Olusoji M Adeyemi, Karen Sliwa
PURPOSE: ST2 receptor, which is a member of the Toll-like/interleukin-1 (IL-1) receptor family, has been found to be increased in the serum of patients 1 day after myocardial infarction. Several other studies have shown that soluble ST2 levels correlate with severity of heart failure (HF), left ventricular ejection fraction, creatinine clearance, B-type natriuretic peptide and C-reactive protein, and are predictors of mortality in HF. Most of these studies were not only limited to ischemic heart disease but also concentrated on left-sided HF...
2017: Vascular Health and Risk Management
https://www.readbyqxmd.com/read/28821330/systemic-atrioventricular-valve-excision-and-ventricular-assist-devices-in-pediatric-patients
#17
Deipanjan Nandi, Kelley D Miller, Carley M Bober, Tami M Rosenthal, Lisa M Montenegro, Joseph W Rossano, J William Gaynor, Christopher E Mascio
BACKGROUND: Continuous-flow ventricular assist devices (CF VADs) designed for adults are increasingly used in pediatric patients. However, there is greater risk of device inflow obstruction as a result of size and anatomy. METHODS: We reviewed all cases of systemic atrioventricular valve (AVV) excision with HeartWare HVAD (HeartWare, Framingham, MA) implantation in the systemic ventricle performed at our institution from November 2015 to May 2016. RESULTS: AVV excision with CF VAD implantation was undertaken in 3 patients...
August 16, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28771512/ace-phenotyping-in-human-heart
#18
Victoria E Tikhomirova, Olga A Kost, Olga V Kryukova, Elena Z Golukhova, Naida I Bulaeva, Aigerim Z Zholbaeva, Leo A Bokeria, Joe G N Garcia, Sergei M Danilov
AIMS: Angiotensin-converting enzyme (ACE), which metabolizes many peptides and plays a key role in blood pressure regulation and vascular remodeling, is expressed as a type-1 membrane glycoprotein on the surface of different cells, including endothelial cells of the heart. We hypothesized that the local conformation and, therefore, the properties of heart ACE could differ from lung ACE due to different microenvironment in these organs. METHODS AND RESULTS: We performed ACE phenotyping (ACE levels, conformation and kinetic characteristics) in the human heart and compared it with that in the lung...
2017: PloS One
https://www.readbyqxmd.com/read/28741664/in-vitro-evaluation-of-an-immediate-response-starling-like-controller-for-dual-rotary-blood-pumps
#19
Andrew F Stephens, Michael C Stevens, Shaun D Gregory, Matthias Kleinheyer, Robert F Salamonsen
Rotary ventricular assist devices (VADs) are used to provide mechanical circulatory support. However, their lack of preload sensitivity in constant speed control mode (CSC) may result in ventricular suction or venous congestion. This is particularly true of biventricular support, where the native flow-balancing Starling response of both ventricles is diminished. It is possible to model the Starling response of the ventricles using cardiac output and venous return curves. With this model, we can create a Starling-like physiological controller (SLC) for VADs which can automatically balance cardiac output in the presence of perturbations to the circulation...
July 25, 2017: Artificial Organs
https://www.readbyqxmd.com/read/28702716/can-the-pulmonary-artery-wedge-pressure-be-used-reliably-as-a-surrogate-for-the-left-atrial-mean-pressure-in-pre-fontan-evaluation
#20
Bassel Mohammad Nijres, Ra-Id Abdulla, Sawsan Awad, Joshua Murphy
The correlation between mean pulmonary artery wedge pressure (PAWP) and left atrial mean pressure (LAMP) has been poorly studied in patients with single ventricle (SV) physiology (Bernstein et al. in Pediatr Cardiol 33: 15-20 2012). The aim of this study is to determine if the PAWP can be used safely as a surrogate to the LAMP to calculate the pulmonary vascular resistance (PVR) during the pre-Fontan evaluation. Also, we aimed to understand if the presence of significant systemic-to-pulmonary collaterals (SPCs) is a confounding factor for accurate estimation of the LAMP...
July 12, 2017: Pediatric Cardiology
keyword
keyword
100662
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"