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https://www.readbyqxmd.com/read/29037982/early-effects-of-epac-depend-on-the-fine-tuning-of-the-sarcoplasmic-reticulum-ca-2-handling-in-cardiomyocytes
#1
N Lezcano, J I E Mariángelo, L Vittone, X H T Wehrens, M Said, C Mundiña-Weilenmann
In cardiac muscle, signaling through cAMP governs many fundamental cellular functions, including contractility, relaxation and automatism. cAMP cascade leads to the activation of the classic protein kinase A but also to the stimulation of the recently discovered exchange protein directly activated by cAMP (Epac). The role of Epac in the regulation of intracellular Ca(2+) homeostasis and contractility in cardiac myocytes is still matter of debate. In this study we showed that the selective Epac activator, 8-(4-chloro-phenylthio)-2'-O-methyladenosine-3', 5'-cyclic monophosphate (8-CPT), produced a positive inotropic effect when adult rat cardiac myocytes were stabilized at low [Ca(2+)]o (0...
October 13, 2017: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/29032225/right-ventricular-dysfunction-in-acute-myocardial-infarction-complicated-by-cardiogenic-shock-a-hemodynamic-analysis-of-the-should-we-emergently-revascularize-occluded-coronaries-for-cardiogenic-shock-shock-trial-and-registry
#2
Anuradha Lala, Yu Guo, Jinfeng Xu, Michele Esposito, Kevin Morine, Richard Karas, Stuart D Katz, Judith S Hochman, Daniel Burkhoff, Navin K Kapur
BACKGROUND: The prevalence and significance of right ventricular dysfunction (RVD) in patients with cardiogenic shock due to acute myocardial infarction (AMI-CS) has not been well characterized. We hypothesized that RVD is common in AMI-CS and associated with worse clinical outcomes. METHODS AND RESULTS: We retrospectively analyzed patients with available hemodynamics enrolled in the SHould we emergently revascularize Occluded coronaries for Cardiogenic shocK (SHOCK) Trial (n=139) and Registry (n=258) to identify RVD in AMI-CS...
October 11, 2017: Journal of Cardiac Failure
https://www.readbyqxmd.com/read/29031174/dynamic-right-ventricular-outflow-obstruction-a-rare-cause-of-hypotension-during-anestesia-induction
#3
Maria Enrica Antoniucci, Christian Colizzi, Gabriella Arlotta, Maria Calabrese, Michele Corrado, Sergio Guarneri, Lorenzo Martinelli, Andrea Scapigliati, Roberto Zamparelli, Franco Cavaliere
INTRODUCTION: Dynamic obstruction of right ventricle outflow tract (RVOTO) is a rare condition that may acutely cause severe heart failure. It has been reported in some hypertrophic cardiomyopathies, after lung transplantation, and in some cases of hemodynamic instability after cardiopulmonary bypass. PRESENTATION OF CASE: We report the case of a 71-year-old man who developed severe hypotension during the induction of general anesthesia for surgical coronary revascularization...
October 5, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/29030210/continuous-cardiac-inotropes-in-patients-with-end-stage-heart-failure-an-evolving-experience
#4
Kasey Malotte, Agafe Saguros, Hunter Groninger
Heart failure experts recommend initiation of continuous inotrope therapy, such as milrinone or dobutamine, for clinically decompensating patients with stage D heart failure. Although originally intended to serve solely as a bridge to more definitive surgical therapies, more and more patients are receiving inotrope therapy for purely palliative purposes. In these cases, questions arise regarding care at the end of life. What criteria determine ongoing clinical benefit? Should the inotrope be continued until death? Should inotrope dosing be increased within recommended guidelines to improve symptoms? What is the role of inotropes in hospice care? Here, we describe such a case as a springboard to contemplate the evolving role of inotrope therapies and how hospice and palliative providers may interface with this rapidly developing face of advanced heart failure care...
October 10, 2017: Journal of Pain and Symptom Management
https://www.readbyqxmd.com/read/29030027/comparison-of-right-ventricular-measurements-by-perioperative-transesophageal-echocardiography-as-a-predictor-of-hemodynamic-instability-following-cardiac-surgery
#5
Pei-Chi Ting, An-Hsun Chou, Chia-Chih Liao, Victor Chien-Chia Wu, Feng-Chun Tsai, Jaw-Ji Chu, Min-Wen Yang, Shi-Chuan Chang
BACKGROUND: The relationship between perioperative right ventricular (RV) performance and hemodynamic instability after cardiac surgery seemed less portrayed. Therefore, we sought to elucidate this relationship and compare the accuracy of different RV systolic indices in predicting outcome of cardiac surgery. METHODS: This study enrolled consecutive patients referred for cardiac surgeries. Exclusion criteria were non-sinus rhythm or contraindications to transesophageal echocardiography (TEE)...
October 10, 2017: Journal of the Chinese Medical Association: JCMA
https://www.readbyqxmd.com/read/29029712/advanced-cardiopulmonary-support-for-pulmonary-embolism
#6
Oren Friedman, James M Horowitz, Danny Ramzy
Management of high-risk pulmonary embolism (PE) requires an understanding of the pathophysiology of PE, options for rapid clot reduction, critical care interventions, and advanced cardiopulmonary support. PE can lead to rapid respiratory and hemodynamic collapse via a complex sequence of events leading to acute right ventricular failure. Importantly, reduction in pulmonary vascular resistance must be accomplished either by systemic thrombolytics, catheter directed thrombolytics, endovascular clot extraction, or surgical embolectomy...
September 2017: Techniques in Vascular and Interventional Radiology
https://www.readbyqxmd.com/read/29027818/effects-of-nesfatin-1-on-atrial-contractility-and-thoracic-aorta-reactivity-in-male-rats
#7
Ayşe Barutcigil, Arda Tasatargil
BACKGROUND: This study aimed to examine the effects of nesfatin-1 on thoracic aorta vasoreactivity and to investigate the inotropic and chronotropic effects of nesfatin-1 on the spontaneous contractions of the isolated rat atria. METHODS: Isolated right atria and thoracic aorta were used in organ baths. The reactivity of the thoracic aorta was evaluated by potassium chloride (KCl), phenylephrine (Phe), acetylcholine (ACh), and sodium nitroprusside (SNP). The effects of nesfatin-1 on the spontaneous contractions of the rat atria were also examined...
October 13, 2017: Clinical and Experimental Hypertension: CHE
https://www.readbyqxmd.com/read/29027322/inotropes-and-vasopressors-in-acute-heart-failure-when-the-devil-dresses-as-an-angel
#8
EDITORIAL
Andrea Mortara
No abstract text is available yet for this article.
October 12, 2017: European Journal of Heart Failure
https://www.readbyqxmd.com/read/29023316/septic-shock-resuscitation-in-the-first-hour
#9
Nicholas Simpson, Francois Lamontagne, Manu Shankar-Hari
PURPOSE OF REVIEW: We reviewed the recent advances in the initial approach to resuscitation of sepsis and septic shock patients. RECENT FINDINGS: Sepsis and septic shock are life-threatening emergencies. Two key interventions in the first hour include timely antibiotic therapy and resuscitation. Before any laboratory results, the need for resuscitation is considered if a patient with suspected infection has low blood pressure (BP) or impaired peripheral circulation found at clinical examination...
October 11, 2017: Current Opinion in Critical Care
https://www.readbyqxmd.com/read/29022532/hiv-positive-patients-in-the-intensive-care-unit-a-retrospective-audit
#10
P Mkoko, R I Raine
BACKGROUND: The indications for and outcomes of intensive care unit (ICU) admission of HIV-positive patients in resource-poor settings such as sub-Saharan Africa are unknown. OBJECTIVE: To identify indications for ICU admission and determine factors associated with high ICU and hospital mortality in HIV-positive patients. METHODS: We reviewed case records of HIV-positive patients admitted to the medical and surgical ICUs at Groote Schuur Hospital, Cape Town, South Africa, from 1 January 2012 to 31 December 2012...
September 22, 2017: South African Medical Journal, Suid-Afrikaanse Tydskrif Vir Geneeskunde
https://www.readbyqxmd.com/read/29016531/myocardial-preload-alters-central-pressure-augmentation-through-changes-in-the-forward-wave
#11
Lennart van de Velde, Daan W Eeftinck Schattenkerk, Pascale A H T Venema, Hendrik J Best, Bas van den Bogaard, Wim J Stok, Berend E Westerhof, Bert Jan H van den Born
OBJECTIVE: Augmentation index (AIx) is often used to quantify the contribution of wave reflection to central pulse pressure. Recent studies have challenged this view by showing how contractility-induced changes in the forward pressure wave can markedly impact AIx. We hypothesized that changes in preload will also affect AIx through changes in the forward wave and studied this in two experiments. METHODS: Noninvasively obtained aortic pressure was used to study central haemodynamics and wave morphology...
October 7, 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/29016380/comparison-of-del-nido-cardioplegia-with-blood-cardioplegia-in-adult-combined-surgery
#12
Raphael Hamad, Anthony Nguyen, Éric Laliberté, Denis Bouchard, Yoan Lamarche, Ismail El-Hamamsy, Philippe Demers
OBJECTIVE: del Nido solution (DNS) is a single-dose cardioplegia designed for pediatric use proposed to offer superior myocardial protection in adults. However, few data support this claim. We hypothesized that DNS and modified blood cardioplegia solution (BS) provide equivalent safety in combined adult valve surgery. METHODS: Between November 2014 and December 2015, 25 patients underwent primary aortic valve replacement and concomitant coronary artery bypass grafting (CABG) with DNS...
October 7, 2017: Innovations: Technology and Techniques in Cardiothoracic and Vascular Surgery
https://www.readbyqxmd.com/read/28994852/h%C3%A3-gdos-insulin%C3%A2-%C3%A2-euglykemiterapi-vid-sv%C3%A3-r-%C3%A2-toxisk-myokard%C3%A2-depression-ett-viktigt-tillskott-i-behandlingsarsenalen
#13
Erik Lindeman, Lovisa Baer Eriksson, Martin Thorsson, Johanna Nordmark Grass
High dose insulin euglycemia therapy - an important addition to the treatment arsenal in severe toxic myocardial depression Fifty-nine patients who developed hemodynamic symptoms necessitating treatment with vasopressors or inotropes after poisoning with calcium channel blockers (CCB) and beta blockers (BB) between January 2010 and August 2016 were identified by a search of the Poisons Information Centre database. In-hospital circulatory arrest occurred in 16/59 (27 %) and the mortality rate was 7/59 (12 %)...
October 9, 2017: Läkartidningen
https://www.readbyqxmd.com/read/28992392/norepinephrine-infusion-improves-hemodynamics-in-the-preterm-infants-during-septic-shock
#14
M Y Rizk, A Lapointe, F Lefebvre, K J Barrington
AIM: This study evaluated the clinical and hemodynamic effects of norepinephrine infusion in preterm infants. METHODS: The effects of norepinephrine therapy for refractory hypotension were evaluated in preterm infants between April 2009 and April 2011 at the neonatal intensive care unit of Sainte-Justine Hospital, Montreal, Quebec. Changes in hemodynamics and clinical parameters were analyzed eight hours before and eight hours after the start of norepinephrine infusion, and eight hours after its cessation...
October 9, 2017: Acta Paediatrica
https://www.readbyqxmd.com/read/28990358/long-term-safety-of-intravenous-cardiovascular-agents-in-acute-heart-failure-results-from-the-european-society-of-cardiology-heart-failure-long-term-registry
#15
Alexandre Mebazaa, Justina Motiejunaite, Etienne Gayat, Maria G Crespo-Leiro, Lars H Lund, Aldo P Maggioni, Ovidiu Chioncel, Eiichi Akiyama, Veli-Pekka Harjola, Petar Seferovic, Cecile Laroche, Marisa Sanz Julve, Eulalia Roig, Frank Ruschitzka, Gerasimos Filippatos
AIMS: The aim of this study was to assess long-term safety of intravenous cardiovascular agents-vasodilators, inotropes and/or vasopressors-in acute heart failure (AHF). METHODS AND RESULTS: The European Society of Cardiology Heart Failure Long-Term (ESC-HF-LT) registry was a prospective, observational registry conducted in 21 countries. Patients with unscheduled hospitalizations for AHF (n = 6926) were included: 1304 (18.8%) patients received a combination of intravenous (i...
October 8, 2017: European Journal of Heart Failure
https://www.readbyqxmd.com/read/28987634/heterodimerization-of-apelin-and-opioid-receptors-and-cardiac-inotropic-and-lusitropic-effects-of-apelin-in-2k1c-hypertension-role-of-perk1-2-and-pkc
#16
Farzaneh Rostamzadeh, Hamid Najafipour, Mahboobeh Yeganeh-Hajahmadi, Saeed Esmaeili-Mahani, Siyavash Joukar, Maryam Iranpour
AIMS: Kappa Opioid receptors (KORs) change the impact of apelin on the phosphorylated ERK1/2 (pERK1/2). However, the role of interaction between KOR and apelin receptors (APJ) on the cardiac contractility effects of apelin and in regulation of pERK1/2 and PKC in the heart of renovascular hypertensive (2K1C) rats is unknown. MAIN METHODS: Hemodynamic factors, the heterodimerization of KOR and APJ, the expression of KOR mRNA and protein and pERK1/2 in the left ventricle of 2K1C rats were measured following APJ, KOR, PKC and Gi path inhibition by F13A, nor-BNI, chelerythrine and PTX respectively...
October 4, 2017: Life Sciences
https://www.readbyqxmd.com/read/28985692/comprehensive-blood-conservation-program-in-a-new-congenital-cardiac-surgical-program-allows-bloodless-surgery-for-the-jehovah-witness-and-a-reduction-for-all-patients
#17
Vincent Olshove, Nicole Berndsen, Veena Sivarajan, Pooja Nawathe, Alistair Phillips
BACKGROUND: Cardiac surgery on Jehovah's Witnesses (JW) can be challenging, given the desire to avoid blood products. Establishment of a blood conservation program involving the pre-, intra- and post-operative stages for all patients may lead to a minimized need for blood transfusion in all patients. METHODS: Pre-operatively, all JW patients were treated with high dose erythropoietin 500 IU/kg twice a week. JW patients were compared to matching non-JW patients from the congenital cardiac database, two per JW to serve as control...
October 1, 2017: Perfusion
https://www.readbyqxmd.com/read/28983248/the-effects-of-sea0400-on-ca-2-transient-amplitude-and-proarrhythmia-depend-on-the-na-ca-2-exchanger-expression-level-in-murine-models
#18
Nils Bögeholz, Jan S Schulte, Sven Kaese, B Klemens Bauer, Paul Pauls, Dirk G Dechering, Gerrit Frommeyer, Joshua I Goldhaber, Uwe Kirchhefer, Lars Eckardt, Christian Pott, Frank U Müller
Background/Objective: The cardiac Na(+)/Ca(2+) exchanger (NCX) has been identified as a promising target to counter arrhythmia in previous studies investigating the benefit of NCX inhibition. However, the consequences of NCX inhibition have not been investigated in the setting of altered NCX expression and function, which is essential, since major cardiac diseases (heart failure/atrial fibrillation) exhibit NCX upregulation. Thus, we here investigated the effects of the NCX inhibitor SEA0400 on the Ca(2+) transient amplitude and on proarrhythmia in homozygous NCX overexpressor (OE) and heterozygous NCX knockout (hetKO) mice compared to corresponding wild-types (WTOE/WThetKO)...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28979560/a-case-study-of-likely-wild-type-cardiac-transthyretin-amyloidosis-causing-rapid-deterioration
#19
Thomas Davies, Aarash Saleh, Gerry Coghlan, Carol Whelan, Banwari Agarwal
We present the case of an 88-year-old gentleman who presented to hospital septic with bilateral leg cellulitis, pulmonary oedema and hypotension. He had no history of heart disease but had had bilateral carpal tunnel releases. His condition deteriorated with refractory hypotension in spite of fluid filling, inotropic and vasopressor support. His echocardiogram showed an infiltrative cardiomyopathy with a speckled myocardium, severe concentric left and right ventricular increased wall thickness, diastolic dysfunction, biatrial dilatation and restrictive physiology in keeping with cardiac amyloidosis...
May 2017: J Intensive Care Soc
https://www.readbyqxmd.com/read/28977576/postinfarction-left-ventricular-free-wall-rupture-a-17-year-single-centre-experience
#20
Francesco Formica, Serena Mariani, Gurmeet Singh, Stefano D'Alessandro, Luigi Amerigo Messina, Norman Jones, Oluwaseun Adebayo Bamodu, Fabio Sangalli, Giovanni Paolini
OBJECTIVES: Left ventricular free wall rupture (LVFWR) is a catastrophic complication following acute myocardial infarction with an estimated incidence of 0.2-7.6% and mortality can be as high as 60%. This study aimed to identify the risk factors for morbidity and mortality in patients affected by LVFWR. METHODS: This is a retrospective study of 35 patients who underwent surgery for LVFWR between January 2000 and December 2016 at our institution. RESULTS: The mean age of patients was 68...
August 1, 2017: European Journal of Cardio-thoracic Surgery
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