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Right ventricular myocardial infarction

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https://www.readbyqxmd.com/read/28303997/right-ventricular-involvement-in-patients-with-inferior-myocardial-infarction-correlation-of-electrocardiographic-findings-with-echocardiography-data
#1
Sumbul Javed, Ali Raza Rajani, Pushparani Govindaswamy, Ghazi Ahmed Radaideh, Harb Ahmed Abubaraka, Tariq Ilyas Qureshi, Hassaan Bin Arshad
OBJECTIVE: To determine the right ventricular involvement in patients with inferior myocardial infarction by echocardiography in relation to electrocardiographic findings. METHODS: This observational, prospective study was conducted at Rashid Hospital, Dubai, the United Arab Emirates, from January to September 2013, and comprised patients with inferior myocardial infarction. All patients aged above 18 years were included. Right ventricular myocardial infarction was defined by the electrocardiographic criteria of > 1mV ST elevation in V4R-V5R leads...
March 2017: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/28298620/refractory-cardiogenic-shock-from-right-ventricular-infarction-successfully-managed-with-inhaled-epoprostenol
#2
Natalie Held, Nathaniel Little, Mori J Krantz, Brian L Stauffer
BACKGROUND Recognition and appropriate management of right ventricular (RV) infarction is essential, as RV injury increases mortality and substantially alters management during acute coronary syndrome. We report a case of RV infarction presenting with new right bundle branch block (RBBB), and therapeutic use of inhaled epoprostenol to reduce RV afterload and augment cardiac output during refractory cardiogenic shock. CASE REPORT A 53-year-old male presented to our institution in ventricular fibrillation with subsequent development of RBBB in the setting of proximal right coronary artery occlusion...
March 16, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28290839/-ischemic-heart-disease-focus-on-acute-infarction-of-the-right-ventricular-myocardium
#3
B A Akbalaeva, T A Batyraliev, D V Fettzer, B A Sidorenko
Ischemic heart disease and acute myocardial infarction (AMI) in particular remain widely spread and contribute seriously in total mortality of population. This literature review is devoted to the right ventricular (RV) AMI as the least studied problem of contemporary cardiology. We present here description of specific characteristics of blood supply to ventricles of the heart, clinical picture, diagnostic criteria and prognosis of RV infarction. We also present current strategy of management of patients with RV AMI including early revascularization with the help of percutaneous coronary intervention...
January 2017: Kardiologiia
https://www.readbyqxmd.com/read/28264596/prolonged-intra-myocardial-growth-hormone-administration-ameliorates-post-infarction-electrophysiologic-remodeling-in-rats
#4
Marianthi Kontonika, Eleonora Barka, Maria Roumpi, Vassilios La Rocca, Panagiotis Lekkas, Evangelos P Daskalopoulos, Agapi D Vilaeti, Giannis G Baltogiannis, Antonios P Vlahos, Simeon Agathopoulos, Theofilos M Kolettis
Experimental studies indicate improved ventricular function after treatment with growth hormone (GH) post-myocardial infarction, but its effect on arrhythmogenesis is unknown. Here, we assessed the medium-term electrophysiologic remodeling after intra-myocardial GH administration in (n = 33) rats. GH was released from an alginate scaffold, injected around the ischemic myocardium after coronary ligation. Two weeks thereafter, ventricular tachyarrhythmias were induced by programmed electrical stimulation...
March 6, 2017: Growth Factors
https://www.readbyqxmd.com/read/28249888/takotsubo-cardiomyopathy-secondary-to-spontaneous-right-sided-pneumothorax
#5
Mouhanna Abu Ghanimeh, Bhaskar Bhardwaj, Abdelrahman Aly, Paramdeep Baweja
Takotsubo cardiomyopathy (TCM) is a unique type of cardiomyopathy characterised by left ventricular systolic dysfunction in association with stressful conditions. Patients with this condition usually present with chest pain and dyspnoea, and the presentation can mimic acute coronary syndrome. We present a case of a woman aged 58 years who presented with progressive dyspnoea and cough. Her initial evaluation was suggestive of acute myocardial infarction with elevated serum troponin T and ST segment elevation...
March 1, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28241751/time-resolved-tracking-of-the-atrioventricular-plane-displacement-in-cardiovascular-magnetic-resonance-cmr-images
#6
Felicia Seemann, Ulrika Pahlm, Katarina Steding-Ehrenborg, Ellen Ostenfeld, David Erlinge, Jean-Luc Dubois-Rande, Svend Eggert Jensen, Dan Atar, Håkan Arheden, Marcus Carlsson, Einar Heiberg
BACKGROUND: Atrioventricular plane displacement (AVPD) is an indicator for systolic and diastolic function and accounts for 60% of the left ventricular, and 80% of the right ventricular stroke volume. AVPD is commonly measured clinically in echocardiography as mitral and tricuspid annular plane systolic excursion (MAPSE and TAPSE), but has not been applied widely in cardiovascular magnetic resonance (CMR). To date, there is no robust automatic algorithm available that allows the AVPD to be measured clinically in CMR with input in a single timeframe...
February 28, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28224928/impact-of-right-ventricular-function-on-outcome-of-severe-aortic-stenosis-patients-undergoing-transcatheter-aortic-valve-replacement
#7
Edward Koifman, Romain Didier, Nirav Patel, Zack Jerusalem, Sarkis Kiramijyan, Itsik Ben-Dor, Smita I Negi, Zuyue Wang, Steven A Goldstein, Michael J Lipinski, Rebecca Torguson, Jiaxiang Gai, Augusto D Pichard, Lowell F Satler, Ron Waksman, Federico M Asch
BACKGROUND: Right ventricular (RV) dysfunction was shown to be associated with adverse outcomes in a variety of cardiac patients and is considered a risk factor for adverse outcome according to the updated Valve Academic Research Consortium criteria. OBJECTIVE: Our goal was to assess the impact of RV function at baseline on 1-year mortality among patients with severe aortic stenosis (AS) undergoing transcatheter aortic valve replacement (TAVR). METHODS: All patients with severe AS treated with TAVR from May 2007 to March 2015 at our center were included in the present study, and baseline and procedural characteristics were recorded for each patient...
February 2017: American Heart Journal
https://www.readbyqxmd.com/read/28217927/hypertension-induced-remodelling-on-the-interactions-of-cardiac-risk-factors
#8
Jakub Tomek, Gil Bub
Hypertension induces considerable cardiac remodelling, such as hypertrophy, interstitial fibrosis, and abnormal activity of cardiac sympathetic nervous system, which are established risk factors in several highly dangerous heart diseases, such as ventricular fibrillation and congestive heart failure. All these risk factors and heart diseases are studied extensively in isolation, but to our knowledge, there is no comprehensive review of their interactions. At the same time, there is growing evidence suggesting that such interactions are numerous and that a successful therapy against a particular condition may have unexpectedly weak effects on mortality, as treated patients may die of a different cause exacerbated by the therapy...
February 19, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28207997/chronically-elevated-bilirubin-protects-from-cardiac-reperfusion-injury-in-the-male-gunn-rat
#9
Bhavisha Bakrania, Eugene F Du Toit, Kevin J Ashton, Karl-Heinz Wagner, John P Headrick, Andrew C Bulmer
AIMS: Bilirubin is associated with reduced risk of cardiovascular disease, as evidenced in conditions of mild hyperbilirubinaemia (Gilbert's Syndrome). Little is known regarding myocardial stress-resistance in hyperbilirubinemic conditions or whether life-long exposure modifies cardiac function, which might contribute to protection from cardiovascular disease. METHODS: Hyperbilirubinemic rats and littermate controls underwent echocardiography at 3, 6 and 12 mo of age, with hearts subsequently assessed for resistance to 30 min of ischaemia...
February 16, 2017: Acta Physiologica
https://www.readbyqxmd.com/read/28194181/simultaneous-left-ventricular-and-deep-vein-thrombi-caused-by-protein-c-deficiency
#10
Harufumi Maki, Motohiro Nishiyama, Motoaki Shirakawa
Protein C deficiency is a risk of venous thrombosis because of poor fibrinolytic activity. It remains controversial whether protein C deficiency causes arterial thrombosis. A 21-year-old woman was referred with a chief complaint of right leg pain and numbness. Contrast-enhanced computed tomography revealed a low-density mass in the left ventricle (LV), splenic infarction, and peripheral arterial obstructions in her right leg. Thrombosis extending from the renal vein to the inferior vena cava was also detected...
2017: Case Reports in Medicine
https://www.readbyqxmd.com/read/28188213/non-invasive-stratification-of-postinfarction-rats-based-on-degree-of-cardiac-dysfunction-using-magnetic-resonance-imaging-and-echocardiography
#11
Jan Magnus Aronsen, Emil Knut Stenersen Espe, Kristine Skårdal, Almira Hasic, Lili Zhang, Ivar Sjaastad
The myocardial infarction (MI) rat model plays a crucial role in modern cardiovascular research, but the inherent heterogeneity of this model represents a challenge. We sought to identify subgroups among the post-MI rats, and establish simple non-invasive stratification protocols for such subgroups. Six weeks after induction of MI, 49 rats underwent non-invasive examinations using magnetic resonance imaging (MRI) and echocardiography. 12 sham-operated rats served as controls. Increased end-diastolic left ventricular (LV) pressure and lung weight served as indicators for congestive heart failure (CHF)...
February 10, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28181692/irisin-plays-a-pivotal-role-to-protect-the-heart-against-ischemia-and-reperfusion-injury
#12
Hao Wang, Yu Tina Zhao, Shouyan Zhang, Patrycja M Dubielecka, Jianfeng Du, Naohiro Yano, Y Eugene Chin, Shougang Zhuang, Gangjian Qin, Ting C Zhao
Irisin, a newly identified hormone, is critical to modulating body metabolism, thermogenesis and reducing oxidative stresses. However, whether irisin protects the heart against myocardial ischemia and reperfusion (I/R) injury remains unknown. In this study, we determine the effect of irisin on myocardial I/R injury in the Langendorff perfused heart and cultured myocytes. Adult C57/BL6 mice were treated with irisin (100mg/kg) or vehicle for 30 minutes to elicit preconditioning. The isolated hearts were subjected to 30 min ischemia followed by 30 min reperfusion...
February 9, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28162089/transient-left-atrial-dysfunction-is-a-feature-of-takotsubo-syndrome
#13
Thomas Stiermaier, Tobias Graf, Christian Möller, Charlotte Eitel, Jakob Ledwoch, Steffen Desch, Matthias Gutberlet, Gerhard Schuler, Holger Thiele, Ingo Eitel
BACKGROUND: Takotsubo syndrome (TTS) is characterized by a transient left and/or right ventricular dysfunction as a consequence of a distinctive pattern of regional wall motion abnormalities. However, a systematic evaluation of the left atrial (LA) function in patients with TTS is lacking. The aim of the present study was therefore to comprehensively assess LA performance indexes and function in patients with TTS. METHODS: We compared LA function assessed by volumetric indexes derived from fractional volume changes in cardiovascular magnetic resonance (CMR) between 125 TTS patients and 125 patients with anterior ST-segment elevation myocardial infarction (STEMI)...
February 6, 2017: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/28158934/inducibility-of-ventricular-arrhythmia-1-year-following-treatment-with-heavy-ion-irradiation-in-dogs-with-myocardial-infarction
#14
Mari Amino, Koichiro Yoshioka, Yoshiya Furusawa, Sachie Tanaka, Noboru Kawabe, Tadashi Hashida, Teruyo Tsukada, Masako Izumi, Sadaki Inokuchi, Teruhisa Tanabe, Yuji Ikari
BACKGROUND: Targeted external heavy ion irradiation (THIR) of rabbit hearts 2 weeks after myocardial infarction (MI) reduced the vulnerability of fatal ventricular tachyarrhythmias (VT/VF) in association with the increased connexin43 (Cx43). Increased Cx43 was maintained for at least 1 year in normal rabbits, but the long-term antiarrhythmic effects in the MI model are unknown. We investigated the propensity for late potentials and VT/VF inducibility. METHODS: Intracoronary injection of microspheres was performed to induce non-transmural MI in anaesthetized 8 beagles...
February 3, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28143616/hypertrophic-obstructive-cardiomyopathy-with-multiple-coronary-arteries-to-right-ventricular-microfistulas-a-case-report-and-review-of-the-literature
#15
Daulat Singh Meena, Chandra Bhan Meena, Javed Parvez
BACKGROUND: Coronary artery microfistulas are a rare anomaly; their association with hypertrophic cardiomyopathy is even rarer and can lead to serious cardiac complications owing to coronary steal phenomena such as angina pectoris, myocardial infarction, congestive heart failure, ventricular and supraventricular arrhythmias, syncope, and sudden death. CASE PRESENTATION: A 32-year-old Indian woman presented to our institute with severe angina on exertion and multiple episodes of pre-syncope...
January 31, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28131806/-effects-of-prolonged-endocardial-stimulation-on-left-ventricular-mechanical-synchrony-a-pilot-study-applying-gated-spect-phase-analysis-endocardial-stimulation-and-dyssynchrony
#16
Federico Ferrando-Castagnetto, Roberto Ricca-Mallada, Alejandro Vidal, Rodolfo Ferrando
OBJETIVE: To evaluate left ventricular mechanical dyssynchrony (LVMD) associated to prolonged right ventricular pacing through an innovative imaging technique, as a pilot study in Uruguay. METHODS: We performed 99mTc-MIBI gated-SPECT and phase analysis in 12 patients with pacemakers implanted at least one year before scintigraphy due to advanced atrioventricular block. Clinical data, QRS duration, rate, mode and site of pacing in right ventricle, chamber diameters, presence and extension of myocardial scar and ischemia and rest LVEF were recorded...
January 25, 2017: Archivos de Cardiología de México
https://www.readbyqxmd.com/read/28129317/a-novel-treatment-using-an-intraventricular-stent-graft-for-postinfarction-ventricular-septal-rupture-in-a-porcine-model
#17
Yuji Nishida, Shigeyuki Tomita, Ryuta Kiuchi, Hiroshi Ohtake, Go Watanabe
OBJECTIVE: Ventricular septal rupture (VSR) is a severe complication of acute myocardial infarction, and the conventional technique for repair is associated with high operative mortality. A novel intraventricular stent graft (IVSG) device was tested as a less invasive treatment for VSR; it does not require cardiopulmonary bypass, cardiac arrest, or left ventricular incision. Its effectiveness was assessed using animal experiments. METHODS: Six pigs were placed on cardiopulmonary bypass...
January 2017: Innovations: Technology and Techniques in Cardiothoracic and Vascular Surgery
https://www.readbyqxmd.com/read/28124965/-bacteremia-caused-by-ciprofloxacin-resistant-salmonella-serotype-kentucky-a-case-report-and-the-review-of-literature
#18
Tuba Müderris, Fatma Yekta Ürkmez, Şeref Alp Küçüker, Muhammet Fethi Sağlam, Gül Ruhsar Yılmaz, Rahmet Güner, Revasiye Güleşen, Ziya Cibali Açıkgöz
Salmonella infections can be seen in four clinical types, namely gastroenteritis, bacteremia/sepsis, enteric fever and carriage. These infections can result in uncomplicated diarrhea in most cases, but can lead to invasive disease requiring antimicrobial therapy and can be life-threatening in elderly or immunocomprimised patients. Broad-spectrum cephalosporins and fluoroquinolones are crucial options in the treatment of the invasive infections. Ciprofloxacin resistance is rarely seen in non-typhoid Salmonella enterica isolates, and only in S...
October 2016: Mikrobiyoloji Bülteni
https://www.readbyqxmd.com/read/28116751/cardiac-sympathetic-afferent-reflex-control-of-cardiac-function-in-normal-and-chronic-heart-failure-states
#19
Han-Jun Wang, George J Rozanski, Irving H Zucker
KEY POINTS: Cardiac sympathetic afferents are considered to be essential pathways for transmission of cardiac nociception to the central nervous system during myocardial ischaemia. However, a potential contribution of the CSAR control of cardiac dysfunction in both normal and chronic heart failure (CHF) states remains unknown. We found that activation of the CSAR evokes little increase in cardiac contractility with an exaggerated peripheral vasoconstriction in the CHF state. CSAR inhibition by epicardial lidocaine decreased cardiac contractility to a greater extent in CHF rats than sham rats...
January 24, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28100429/right-ventricular-function-measured-by-tapse-in-obese-subjects-at-the-time-of-acute-myocardial-infarction-and-2year-outcomes
#20
Yaser S Alhamshari, Talal Alnabelsi, Ramzi Mulki, Beatriz Cepeda-Valery, Vincent M Figueredo, Abel Romero-Corral
INTRODUCTION: Obesity is associated with significantly better outcome after acute myocardial infarction (AMI), a phenomenon known as 'obesity paradox'. Tricuspid annular plane systolic excursion (TAPSE) is an echocardiographic measurement of right ventricular (RV) function and has prognostic implications at the time of AMI. METHODS: We examined the difference in RV function among patients admitted with AMI according to obesity status. In a single center cohort analysis of 105 patients admitted between 2010 and 2011 with the diagnosis of AMI...
January 6, 2017: International Journal of Cardiology
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