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Right ventricular myocardial infarction

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https://www.readbyqxmd.com/read/28629852/bioelectronic-block-of-paravertebral-sympathetic-nerves-mitigates-post-myocardial-infarction-ventricular-arrhythmias
#1
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/28617040/complete-atrioventricular-block-in-acute-coronary-syndrome-prevalence-characterisation-and-implication-on-outcome
#2
Silvia Aguiar Rosa, Ana Teresa Timóteo, Lurdes Ferreira, Ramiro Carvalho, Mario Oliveira, Pedro Cunha, André Viveiros Monteiro, Guilherme Portugal, Luis Almeida Morais, Pedro Daniel, Rui Cruz Ferreira
PURPOSE: The aim was to characterise acute coronary syndrome patients with complete atrioventricular block and to assess the effect on outcome. METHODS: Patients admitted with acute coronary syndrome were divided according to the presence of complete atrioventricular block: group 1, with complete atrioventricular block; group 2, without complete atrioventricular block. Clinical, electrocardiographic and echocardiographic characteristics and prognosis during one year follow-up were compared between the groups...
June 1, 2017: European Heart Journal. Acute Cardiovascular Care
https://www.readbyqxmd.com/read/28597772/right-ventricular-st-elevation-myocardial-infarction-as-a-cause-of-death-in-idiopathic-pulmonary-arterial-hypertension
#3
Yang Zhan, Barry Burstein, Ali O Abualsaud, Mohamed Nosair, Andrew M Hirsch, Lyda Lesenko, David Langleben
A 32-year-old woman with advanced idiopathic pulmonary arterial hypertension (PAH), treated with oral tadalafil and intravenous epoprostenol, presented with typical angina pectoris of one day's duration. Her electrocardiogram, previously typical of pulmonary hypertension, revealed an acute ST-elevation myocardial infarction in the anterior precordial leads. She had a prior coronary angiogram, in preparation for lung transplantation, that revealed normal coronary arteries. Urgent coronary angiography showed acute occlusion of several acute marginal coronary branches that feed the right ventricle (RV)...
April 2017: Pulmonary Circulation
https://www.readbyqxmd.com/read/28594441/rapid-computation-of-single-pet-scan-rest-stress-myocardial-blood-flow-parametric-images-by-table-look-up
#4
Nicolas J Guehl, Marc D Normandin, Dustin W Wooten, Guy Rozen, Jeremy Ruskin, Timothy M Shoup, Jonghye Woo, Leon M Ptaszek, Georges El Fakhri, Nathaniel M Alpert
PURPOSE: We have recently reported a method for measuring rest-stress myocardial blood flow (MBF) using a single, relatively short, PET scan session. The method requires two IV tracer injections, one to initiate rest imaging and one at peak stress. We previously validated absolute flow quantitation in ml/min/cc for standard bull's eye, segmental analysis. In this work, we extend the method for fast computation of rest-stress MBF parametric images. METHODS: We provide an analytic solution to the single-scan rest-stress flow model which is then solved using a two-dimensional table lookup method (LM)...
June 8, 2017: Medical Physics
https://www.readbyqxmd.com/read/28591063/a-new-technique-for-lipid-core-plaque-detection-by-optical-coherence-tomography-for-prevention-of-peri-procedural-myocardial-infarction-a-case-report
#5
Yongcheol Kim, Muthukaruppan Gnanadesigan, Gijs van Soest, Thomas W Johnson
RATIONALE: Percutaneous coronary intervention (PCI) provides effective revascularization of atherosclerotic coronary arteries but the invasive nature of treatment can result in complications. PATIENT CONCERNS: A 53-year old man underwent coronary angiography due to chest pain with minimal ST-segment elevation in the inferior leads of the electrocardiogram. DIAGNOSIS: We proceeded directly to coronary angiography and delineated a moderate stenosis with haziness in the mid right coronary artery (RCA)...
June 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28574594/a-novel-protein-engineered-hepatocyte-growth-factor-analog-released-via-a-shear-thinning-injectable-hydrogel-enhances-post-infarction-ventricular-function
#6
Amanda N Steele, Lei Cai, Vi N Truong, Bryan B Edwards, Andrew B Goldstone, Anahita Eskandari, Aaron C Mitchell, Laura M Marquardt, Abbygail A Foster, Jennifer R Cochran, Sarah C Heilshorn, Y Joseph Woo
In the last decade, numerous growth factors and biomaterials have been explored for the treatment of myocardial infarction (MI). While pre-clinical studies have demonstrated promising results, clinical trials have been disappointing and inconsistent, likely due to poor translatability. In the present study, we investigate a potential myocardial regenerative therapy consisting of a protein-engineered dimeric fragment of hepatocyte growth factor (HGFdf) encapsulated in a shear-thinning, self-healing, bioengineered hydrogel (SHIELD)...
June 2, 2017: Biotechnology and Bioengineering
https://www.readbyqxmd.com/read/28570022/slow-antegrade-excitation-and-delayed-retrograde-activation-through-an-inexcitable-zone-a-basis-for-arrhythmia-formation-in-infarcted-myocardium-ex-vivo
#7
Eugene Patterson, Benjamin J Scherlag
INTRODUCTION: The electrophysiologic mechanism for rate-dependent PVBs associated with double potentials (DPs) was investigated in infarcted canine hearts using bipolar and intracellular microelectrode recordings. METHODS AND RESULTS: Dogs exhibiting rate-related ventricular ectopic beats (coupling interval, 390 ± 54 milliseconds) during sinus rhythm or atrial pacing were studied 4-5 days (N = 63) or 25 days (N = 16) following anterior descending coronary artery ligation...
June 1, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28560027/successful-surgical-employment-of-impella-recovery-system-for-right-ventricular-failure-after-previous-aortic-valve-replacement
#8
Klodian Krakulli, Edvin Prifti, Vinicio Fiorani, Mario Zogno
A 58-year-old woman underwent aortic valve replacement. On the second postoperative day the patient referred a sharply chest pain, and an emergent coronary angiography revealed total occlusion of the right coronary artery. An intra-aortic ballon pump was placed and the patient underwent emergent off-pump coronary revascularization of the right coronary artery. Five hours later, due to unstable hemodynamic the extracorporeal membrane oxygenation was implanted without improvement of the right ventricular (RV) function...
May 2017: Journal of Surgical Case Reports
https://www.readbyqxmd.com/read/28555388/right-coronary-artery-ectasia-with-coronary-arteriovenous-fistula-mimicking-takotsubo-like-left-ventricular-dysfunction-in-the-electrocardiogram
#9
Akane Tsuchiya, Michiaki Nagai, Keigo Dote
A coronary arteriovenous fistula is an abnormal connection between a coronary artery and any of four chambers in the heart. We repot a unique case with a fistulae originating from right coronary artery and draining into the right atrium via coronary sinus although Takotsubo-like left ventricular dysfunction or acute myocardial infarction was initially thought to have occurred according to the electrocardiogram finding.
May 29, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28538417/clinical-and-electrocardiographic-characteristics-of-infarctional-ventricular-ectopic-beats-an-observational-study
#10
Yuechun Li, Shi Zhe-Wei, Zheng Cheng, Chen Guang-Yi, Zhou De-Pu, Li Xiao-Wei, Guan Xueqiang, Lin Jiafeng, Chen Peng
The purpose of this study was to explore the clinical and electrocardiographic characteristics of infarctional ventricular ectopic beats (IVEBs).Thirty-eight acute myocardial infarction (AMI) patients with IVEB and 109 AMI patients without IVEB were analyzed. The morphological changes of QRS complex, ST segment, and T wave were compared to IVEB with sinus rhythm from the same period and fully evolved phase.An IVEB QRS complex often revealed the right bundle branch block morphology, in addition to Q wave AMI; no-Q wave AMI also had IVEB...
May 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28532425/combined-pulmonary-and-left-ventricular-support-with-veno-pulmonary-ecmo-and-impella-5-0-for-cardiogenic-shock-after-coronary-surgery
#11
Sameh Sayed, Christoph Schimmer, Ina Shade, Rainer Leyh, Ivan Aleksic
BACKGROUND: Mechanical circulatory support is a common practice nowadays in the management of patients after cardiogenic shock due to myocardial infarction. The single or combined use of one or more devices for mechanical support depends not only on the advantage or disadvantage of these devices but also on the timing of use of these devices before the development of multi organ failure. In our case we used more than one tool for mechanical circulatory support during the prolonged and complicated course of our patient with postcardiotomy cardiogenic shock after coronary artery bypass surgery...
May 22, 2017: Journal of Cardiothoracic Surgery
https://www.readbyqxmd.com/read/28529306/normalization-of-diffuse-st-depression-with-avr-elevation-after-rehydration-in-a-patient-with-severe-aortic-stenosis
#12
Sachin R Patel, Vikas J Patel, Brittany Clark, George Rust
BACKGROUND Isolated ST elevation in lead aVR in combination with global ST depression with normalization after rehydration is a unique electrocardiographic pattern that is associated with a broad range of diagnoses. Its association with left main coronary artery disease and other acute coronary syndromes suggest the need for early and aggressive cardiac evaluation. CASE REPORT A 53-year-old man presented with altered mental status and loss of consciousness. He was unresponsive, hypotensive, tachycardiac, and diaphoretic...
May 22, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28525971/left-ventricular-mural-thrombus-and-dual-coronary-embolization-associated-with-hyperthyroid-cardiomyopathy-and-atrial-fibrillation-a-case-report
#13
Guohui Liu, Ping Yang, Yuquan He
BACKGROUND: The majority of acute myocardial infarction (AMI) events are caused by thrombotic occlusion of the coronary artery, secondary to atherosclerotic plaque erosion or rupture. However, coronary embolism (CE), while rare, is being increasingly recognized as an important cause of AMI. We present the case of a patient with multi-site coronary artery embolization associated with hyperthyroid-related cardiomyopathy and atrial fibrillation. CASE PRESENTATION: A 49-year-old female with a history of hyperthyroidism and atrial fibrillation (AF) was admitted to our hospital presenting with right upper limb pain and swelling...
May 19, 2017: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/28520537/anomalous-origin-of-right-coronary-artery-from-left-coronary-sinus-13-cases-treated-with-the-reimplantation-technique
#14
Alain Cubero, Alejandro Crespo, Gadah Hamzeh, Andrés Cortes, Daniel Rivas, José Ignacio Aramendi
OBJECTIVES: Anomalous aortic origin of a coronary artery is uncommon but potentially clinically significant. Manifestations vary from asymptomatic patients to those who present with angina pectoris, myocardial infarction, heart failure, syncope, arrhythmias, and sudden death. We describe our experience with surgical reimplantation and results at midterm follow-up. METHODS: Between February 2003 and July 2016, a total of 13 patients with anomalous origin of the right coronary artery (RCA) from the left sinus underwent surgical reimplantation...
May 2017: World Journal for Pediatric & Congenital Heart Surgery
https://www.readbyqxmd.com/read/28518124/direct-re-implantation-of-left-coronary-artery-into-the-aorta-in-adults-with-anomalous-origin-of-left-coronary-artery-from-the-pulmonary-artery-alcapa
#15
Reza Tavakoli, Peiman Jamshidi, Nassrin Yamani, Max Gassmann
Anomalous origin of the left coronary artery from the pulmonary artery (ALCAPA) is a rare congenital anomaly which is one of leading causes of myocardial ischemia and infarction in children. If left untreated, it results in a 90% mortality rate in the first year of life. In patients who survive to the adulthood, the coronary steal phenomenon and retrograde left-sided coronary flow provide a substrate for chronic subendocardial ischemia, which may lead to left ventricular dysfunction, ischemic mitral regurgitation, malignant ventricular arrhythmias, and sudden cardiac death...
April 24, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28500753/a-0h-1h-protocol-for-safe-early-discharge-of-chest-pain-patients
#16
Arash Mokhtari, Bertil Lindahl, Alexandru Schiopu, Troels Yndigegn, Ardavan Khoshnood, Patrik Gilje, Ulf Ekelund
OBJECTIVES: Guidelines recommend a 0h/1h high-sensitivity cardiac troponin T (hs-cTnT) diagnostic strategy in acute chest pain patients. There is however little data on the performance of this strategy when combined with clinical risk stratification. We aimed to evaluate the diagnostic accuracy of an accelerated diagnostic protocol (ADP) using the 0h/1h hs-cTnT strategy together with an adapted Thrombolysis In Myocardial Infarction (TIMI) score and ECG for ruling out major adverse cardiac events (MACE) within 30 days...
May 13, 2017: Academic Emergency Medicine: Official Journal of the Society for Academic Emergency Medicine
https://www.readbyqxmd.com/read/28498644/early-versus-late-percutaneous-revascularization-in-patients-hospitalized-with-non-st-segment-elevation-myocardial-infarction-the-atherosclerosis-risk-in-communities-surveillance-study
#17
Sameer Arora, Kunihiro Matsushita, Arman Qamar, R Brandon Stacey, Melissa C Caughey
BACKGROUND: Current guidelines recommend early invasive intervention (<24 hr) for high risk patients with non-ST-segment elevation myocardial infarction (NSTEMI). A delayed invasive strategy (24-72 hr) is considered reasonable for low risk patients. The real-world effectiveness of this strategy is unknown. METHODS: The ARIC Study has conducted hospital surveillance of acute myocardial infarction (MI) since 1987. NSTEMI was classified using a validated algorithm...
May 12, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28485279/predicting-the-infarct-related-artery-in-stemi-from-the-surface-ecg-independent-validation-of-proposed-criteria
#18
Rob Eerdekens, Jose F Chavez, Justin M Fox, James D Flaherty, Lukas Rc Dekker, Nils P Johnson
AIMS: This study independently evaluated the diagnostic performance of electrocardiographic (ECG) criteria to predict the infarct related artery (IRA) in patients with an acute ST-segment elevation myocardial infarction (STEMI). While a number of ECG criteria have been proposed to predict the IRA in STEMI, many of these "rules" came from modestly sized populations and did not undergo external validation. Therefore, we evaluated popular criteria from the literature in an independent cohort...
May 9, 2017: EuroIntervention
https://www.readbyqxmd.com/read/28470918/isolated-left-ventricular-failure-is-a-predictor-of-poor-outcome-in-patients-receiving-veno-arterial-extracorporeal-membrane-oxygenation
#19
Corstiaan A den Uil, Lucia S Jewbali, Martijn J Heeren, Alina A Constantinescu, Nicolas M Van Mieghem, Dinis Dos Reis Miranda
AIMS: We investigated survival according to the nature of heart failure (isolated left, vs isolated right, vs biventricular heart failure) in patients undergoing extracorporeal membrane oxygenation (ECMO) for refractory cardiogenic shock of different causes. METHODS AND RESULTS: This single-center study included 132 patients with acute myocardial infarction (20%), acute on chronic heart failure (14%), post cardiotomy (17%), cardiac allograft failure (8%), pulmonary embolism (16%), and acute nonischemic heart failure (25%)...
May 2017: European Journal of Heart Failure
https://www.readbyqxmd.com/read/28433554/catheter-ablation-to-prevent-sudden-cardiac-death
#20
Josef Kautzner, Petr Peichl
Since ventricular arrhythmias are a common cause of sudden cardiac death (SCD), treatment for ventricular arrhythmias is the target area of interest in research field. Among different means to prevent ventricular arrhythmias, catheter ablation (CA) has emerged as an effective therapeutic method. CA can decrease the likelihood of SCD in the following arrhythmia categories: 1) idiopathic ventricular fibrillation (VF) that is usually triggered by premature ventricular beats originating in the Purkinje fibres; 2) VF in subjects with structural heart disease, especially after myocardial infarction, that is triggered by premature ventricular beats from surviving Purkinje fibres; 3) Brugada syndrome in which modification of an epicardial substrate in the right ventricular outflow tract might be the most promising strategy; 4) recurrent monomorphic ventricular tachycardias in the setting of structural heart disease; 5) ventricular preexcitation in which CA appears to be a method of choice in high risk patients, regardless of the presence or absence of symptoms...
April 1, 2017: International Journal of Cardiology
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