Consulta: subjectFacets:"Echocardiography"
Registros recuperados: 26
Data/hora: 11/06/2024 03:19:58

Cardiac evaluation after experimental intoxication by Amorimia rigida (Malpighiaceae) extracts in rabbits
Provedor de dados: Journal of Venomous Animals and Toxins Including Tropical Diseases
Autores: Borboleta,LR; Silva,EF; Oliveira,MS; Michel,AFRM; Ferraz,VP; Leite,RC; Melo,MM.
Clinical and laboratory changes were evaluated in rabbits after intoxication by Amorimia rigida, a plant that causes sudden death. Nine New Zealand male rabbits, averaging 3.54 kg, were categorized into three groups (n = 3) and received, for eight consecutive days, the equivalent of 30 g/kg dry matter of A. rigida water-soluble (SG) and water-insoluble (IG) extracts via nasoesophageal route. The control group received water. There were no alterations in creatine kinase enzyme (CK), CK myocardial fraction (CKMB) or troponine I (cTnI). None of the animals had clinical or electrocardiographic (conventional and Holter) alterations. There were progressive decreases in the left ventricular ejection fraction and systolic fractional shortening. Doppler...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Toxic plant; Amorimia rigida; Cardiac muscle profile; Electrocardiography; Echocardiography; Rabbit.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992012000300007

Echocardiographic changes during acute pulmonary edema subsequent to scorpion sting
Provedor de dados: Journal of Venomous Animals and Toxins Including Tropical Diseases
Autores: Delma,K.
Acute pulmonary edema (APE) occurring after scorpion sting is the leading cause of death of the victims of scorpion envenomation. The APE origin is still questioned by physicians treating these patients. Based on echocardiographic study of 20 patients with severe envenomation treated in Ouargla Hospital resuscitation ward during the last four years, the APE etiology seems more likely cardiogenic, referring to cardiac symptoms confirmed by echocardiography although other mechanisms may also be involved. This hypothesis is further confirmed by the positive response of patients to the administration of dobutamine.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Scorpion envenomation; Acute pulmonary edema; Echocardiography; Dobutamine.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992012000400010

右心房内に血栓を認めた後大静脈血栓症の育成牛の1 例
Provedor de dados: Obihiro University of Agriculture and Veterinary Medicine Academic Repository (OAK)
Autores: 猪熊, 壽; 吉林台; 下田, 崇; 富樫, 義彦; 古林, 与志安; 古岡, 秀文; 佐藤, 基佳; 石井, 三都夫; INOKUMA, Hisashi; Jilintai; SHIMODA, Takashi; TOGASHl, Yoshihiko; KOBAYASHl, Yoshiyasu; FURUOKA, Hidefumi; SATHO, Motoyoshi; ISHI, Mitsuo.
1 歳10 カ月のホルスタイン種育成雌牛が，初診時食欲不振，削痩，チアノーゼ，肺音粗励，発咳等の症状を呈した． さらに第14病日には頻脈，頸静脈拍動等の循環器症状が認められた．血液および血液生化学検査により慢性炎症像が， また心エコー検査により右心房内に三尖弁と付着しない高エコー占拠性病変が観察された．本症例は病理解剖により後 大静脈血栓症と診断されたが，血栓が心臓内において描出されたまれな症例と思われた． A 22-month-old，Holstein heifer was presented with anorexia，emaciation，cyanosis，rough vesicular breathing， and coughing on the first day. On day 14， cardiovascular symptoms such as tachycardia and jugular vein pulsation were found. A blood and blood biochemical examination revealed chronic inflammation. High echogenic obstruction without any attachment to the tricuspid valve was observed in the right atrium by echocardiograph. Pathological findings confirmed a diagnosis of caudal vena cava thrombosis. It was believed to be a rare case with thrombus in the...
Palavras-chave: 後大静脈血栓症; 心エコー検査; Caudal vena cava thrombosis; Echocardiography.
Ano: 2009
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2805

Echocardiographic evaluation of the left atrium of healthy dogs using the conventional M-mode and the bidimensional mode
Provedor de dados: Arquivo Brasileiro de Medicina Veterinária e Zootecnia
Autores: Prada,D.G.; Oliveira,V.M.C.; Larsson,M.H.M.A.; Yamaki,F.L.
The left atrium (LA) was evaluated through the bidimensional method (2-D) (short axis) and the relation left atrium:aorta (LA:Ao) in a group of 40 healthy adult dogs between 1.5 and 7 years of age and weights ranging from 3.2 to 38.3kg, and these values were compared to those in the conventional M-mode. Comparing the variable LA and Ao with the two methods and their respective indexes, significant statistical difference was observed (P&lt;0,001), high positive correlation between the weight and LA-2D and LAM, between body surface and LA-2D and LAM. A difference between LA and Ao in both methods and these respective indicators were observed. The association was higly positive between weight and body surface area (BSA) and between M- mode LA (LAM) and 2-D...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dog; Echocardiography; Left atrium; Normal.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352012000300009

Survival and echocardiographic evaluation of dogs with idiopathic dilated cardiomyopathy treated with carvedilol
Provedor de dados: Arquivo Brasileiro de Medicina Veterinária e Zootecnia
Autores: Soares,E.C.; Pereira,G.G.; Petrus,L.C.; Leomil Neto,M.; Yamaki,F.L.; Larsson,M.H.M.A.
Sixty dogs with idiopathic dilated cardiomyopathy were randomly treated with traditional therapy - digitalis, diuretics, angiotensin-converting inhibitors - (group A) or treated with these drugs plus carvedilol (group B). Echocardiographic variables were measured before and after 3, 13, 26, and 52 weeks of treatment or until death. Comparisons between groups and time were performed. No significant differences between groups were found in the most of the echocardiographic variables. The left ventricular end-systolic diameter indexed to body surface area (LVESDi) increased significantly in the group A dogs compared to the group B animals. The survival of groups A and B dogs were not different (P-value=0.1137). In conclusion, the stability of the LVESDi...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dog; Cardiomyopathy; Carvedilol; Heart failure; Echocardiography.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352010000300009

Effect of exercise on cardiovascular parameters in search and rescue-trained dogs
Provedor de dados: Arquivo Brasileiro de Medicina Veterinária e Zootecnia
Autores: Santos,P.O.P.R.; Santos,E.A.; Reis,A.C.; Santos,A.M.M.R.; Kuster,M.C.C.; Trivilin,L.O.; Aptekmann,K.P.
ABSTRACT Physical activity alters the cardiovascular system of dogs, depending on the exercise characteristics and the animal’s physical conditioning. Little is known about the cardiovascular changes in rescue-trained dogs. This study evaluated the cardiovascular responses to a search and rescue exercise session to differentiate these alterations from cases of exhaustion or some possible pathology. Nine healthy rescue-trained dogs that trained for at least one year were used. Seven German Shepherds and two Belgian Shepherd Malinois were evaluated twice, immediately before exercise (M0) and immediately after a 20-minute training (M1). Electrocardiographic, echocardiographic, and systemic blood pressure (SBP) measurements were performed at each evaluation....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Working dog; Blood pressure; Echocardiography; Electrocardiography; Exercise physiology.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352018000401036

Tricuspid valve dysplasia and Ebstein's anomaly in dogs: case report
Provedor de dados: Arquivo Brasileiro de Medicina Veterinária e Zootecnia
Autores: Sousa,M.G.; Gerardi,D.G.; Alves,R.O.; Camacho,A.A.
Two cases of tricuspid valve dysplasia are reported. Dogs were presented for evaluation of weakness and ascites. In both cases, echocardiography disclosed tricuspid insufficiency and, in one of them, tricuspid leaflets also were displaced down into the right ventricle, substantiating Ebstein's anomaly. Medical therapy for congestive heart failure was initiated. One of the dogs suddenly died shortly after diagnosis was established. Although the other dog recovered much better initially, sudden death also occurred. Post-mortem examinations showed right atrioventricular enlargement, and thickened tricuspid leaflets. Clinical features, diagnostic methods and medical therapy are discussed in this paper.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Congenital heart disease; Echocardiography; Atrioventricular valve malformation.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352006000500010

Chronic valvular disease: correlation between clinical, electrocardiographic, radiographic and echocardiographic aspects in dogs
Provedor de dados: Arquivo Brasileiro de Medicina Veterinária e Zootecnia
Autores: Soares,E.C.; Larsson,M.H.M.A.; Yamato,R.J.
Echocardiographic aspects of chronic mitral valvular disease were studied and compared to physical, radiographic and electrocardiographic aspects. Seventy dogs were used, and clinical examination, thoracic radiography, electrocardiogram and echocardiogram were performed. Correlations between regurgitation severity with cardiac failure functional class and murmur intensity were observed. The electrocardiogram showed a low sensibility in detecting cardiac chamber enlargement, caused by mitral regurgitation. All the dogs with severe mitral regurgitation showed cardiomegaly according to thoracic radiographies.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dog; Heart; Cardiac failure; Echocardiography; Cardiac valve.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352005000400003

Cardiovascular assessment in Female Spotted Paca ( Cuniculus paca )
Provedor de dados: Arquivo Brasileiro de Medicina Veterinária e Zootecnia
Autores: Almeida,V.T.; Uscategui,R.A.R.; Restan,W.A.Z.; Feliciano,M.A.R.; Ortiz,E.M.; Kawanami,A.E.; Barros,F.F.P.C.; Santos,V.J.C.; Vicente,W.R.R.
ABSTRACT Aiming to provide cardiovascular morphophysiology information on the Cuniculus paca, an important neotropical rodent, eight healthy adult females of this species were evaluated three times by echocardiography under general anesthesia with isoflurane every 15 days. The exams were performed by a single experienced evaluator with the animals positioned in right and left decubitus. Posteriorly, two expert evaluators measured the cardiac chambers, walls and flow patterns, by B-mode, M-mode, and Doppler ultrasonography. The resulting values were compared among evaluators and periods by the Bland-Altman agreement test and several descriptive statistics were presented for each parameter. Echocardiographic images were obtained between the second and fifth...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Echocardiography; Rodents; Neotropical; Wildlife.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352019000100061

Mitral flow propagation velocity in non-sedated healthy cats
Provedor de dados: Arquivo Brasileiro de Medicina Veterinária e Zootecnia
Autores: Silva,A.C.; Muzzi,R.A.L.; Oberlender,G.; Muzzi,L.A.L.; Coelho,M.R.; Nogueira,R.B.
Mitral flow propagation velocity (Vp) is an index used to evaluate the left ventricular diastolic function. Its influence on human and small animal cardiopathies has been studied; however there are few reports evaluating this variable in domestic felines. In addition, there is a lack of studies in non-sedated healthy cats. Therefore, the purpose of this study was to establish values for Vp and its correlation with other echocardiographic indexes in non-sedated healthy cats in order to provide new perspectives related to diastolic function in this species. Twenty-six clinically healthy cats were submitted to echocardiography to assess the animals' cardiac conditions. Variables such as age, heart rate (HR), body surface area (BSA), initial (E mitral) and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Feline; Cardiopathies; Echocardiography; Diastolic function.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352014000100003

Cardiovascular assessment in horses sedated with xylazine or amitraz
Provedor de dados: Arquivo Brasileiro de Medicina Veterinária e Zootecnia
Autores: Linardi,R.L.; Canola,J.C.; Valadão,C.A.A.
Cardiovascular effects due to intravenous (IV) xylazine (1.0mg/kg) or amitraz (0.1 or 0.4mg/kg) were evaluated in horses. Left ventricular function indexes, heart rate (HR), and cardiac output (CO) were measured by echocardiography. Second degree atrioventricular (AV) block was detected by electrocardiography. Invasive arterial blood pressure (AP) was also evaluated. All parameters were measured immediately before and during 60 minutes after drug injection. HR, CO, and second degree AV block were different between xylazine and amitraz-0.4mg/kg groups. Xylazine induced initial hypertension 10 minutes after injection, and hypotension was observed 30 minutes after amitraz-0.4mg/kg administration. Except for the second degree AV block which occurred only at...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Horse; Alpha-2 agonist; Xylazine; Amitraz; Echocardiography.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352008000200008

Echocardiographic parameters in dogs treated with acepromazine and fentanyl
Provedor de dados: Arquivo Brasileiro de Medicina Veterinária e Zootecnia
Autores: Santos,E.A.; Aptekmann,K.P.; Santos,P.O.P.R.; Reis,A.C.; Kuster,M.C.C.; Andrade Junior,P.S.C.
ABSTRACT Considering that the use of tranquillizers could optimize the performance of the echocardiogram, this study aimed to evaluate the effect of protocols with acepromazine and fentanyl on the echocardiographic parameters of healthy dogs, besides their effect in systolic blood pressure (SBP), respiratory rate (RR), heart rate (HR), time spent for examination and sedation scale. Ten adult dogs were submitted to different tranquilizing protocols 20 minutes before the echocardiographic examination, totalling five treatments for each pair, performed at seven-day intervals between evaluations. The treatments were CT (control treatment), IAT (intramuscular acepromazine), OAT (oral acepromazine), FT (fentanyl) and AFT (acepromazine associated with fentanyl)....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Echocardiography; Phenothiazine; Opioid.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352018000601767

Association of serum total bilirubin levels with diastolic dysfunction in heart failure with preserved ejection fraction
Provedor de dados: Biological Research
Autores: Zheng,Huan; Li,Ye; Xie,Nanzi.
BACKGROUND: Left ventricular diastolic dysfunction is one of the main characteristics of heart failure patients with a preserved left ventricular ejection fraction. As bilirubin is regarded as an important endogenous antioxidant molecule, serum total bilirubin levels were compared between heart failure patients with a preserved left ventricular ejection fraction and normal controls in this study. We recruited 327 heart failure patients with a preserved left ventricular ejection fraction and 200 healthy controls. Patients were divided into 4 subgroups by their comprehensive echocardiographic manifestations, 1-mild, 2-moderate, 3-severe (reversible restrictive), 4-severe (fixed restrictive). Total bilirubin levels were compared using stepwise multiple...
Tipo: Journal article
Palavras-chave: Bilirubin; Heart failure; Diastolic dysfunction; Echocardiography.
Ano: 2014
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602014000100007

Effect of pulmonary hypertension on outcome of pulmonary tuberculosis
Provedor de dados: Brazilian Journal of Infectious Diseases
Autores: Marjani,Majid; Baghaei,Parvaneh; Malekmohammad,Majid; Tabarsi,Payam; Sharif-Kashani,Babak; Behzadnia,Neda; Mansouri,Davood; Masjedi,Mohammad Reza; Velayati,Ali Akbar.
Background:This study performed at the National Research Institute of Tuberculosis and Lung Disease, Tehran, Iran, aimed to evaluate the effect of concomitant pulmonary hypertension on the outcome of pulmonary tuberculosis.Methods:New cases of pulmonary tuberculosis were recruited for the study. Pulmonary hypertension was defined as systolic pulmonary arterial pressure ≥35 mm Hg estimated by transthoracic Doppler echocardiography. We assessed the relationship between pulmonary hypertension and mortality during the six-month treatment of tuberculosis.Results:Of 777 new cases of pulmonary tuberculosis, 74 (9.5%) had systolic pulmonary arterial pressure ≥35 mm Hg. Ten of them (13.5%) died during treatment compared to 5% of cases with pulmonary arterial...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Tuberculosis; Pulmonary hypertension; Echocardiography; Survival.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702014000500487

The role of secondary hyperparathyroidism in left ventricular hypertrophy of patients under chronic hemodialysis
Provedor de dados: Brazilian Journal of Medical and Biological Research
Autores: Randon,R.B.; Rohde,L.E.; Comerlato,L.; Ribeiro,J.P.; Manfro,R.C.
End-stage renal disease (ESRD) patients frequently develop structural cardiac abnormalities, particularly left ventricular hypertrophy (LVH). The mechanisms involved in these processes are not completely understood. In the present study, we evaluated a possible association between parathyroid hormone (PTH) levels and left ventricular mass (LVM) in patients with ESRD. Stable uremic patients on intermittent hemodialysis treatment were evaluated by standard two-dimensional echocardiography and their sera were analyzed for intact PTH. Forty-one patients (mean age 45 years, range 18 to 61 years), 61% males, who had been on hemodialysis for 3 to 186 months, were evaluated. Patients were stratified into 3 groups according to serum PTH: low levels (&lt;100 pg/ml;...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: End-stage renal failure; Parathyroid hormone; Echocardiography; Left ventricular hypertrophy.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005000900016

Effect of different anesthetic agents on left ventricular systolic function assessed by echocardiography in hamsters
Provedor de dados: Brazilian Journal of Medical and Biological Research
Autores: Tanaka,D.M.; Romano,M.M.D.; Carvalho,E.E.V.; Oliveira,L.F.L.; Souza,H.C.D.; Maciel,B.C.; Salgado,H.C.; Fazan-Júnior,R.; Simões,M.V.
Determination of left ventricular ejection fraction (LVEF) using in vivo imaging is the cardiac functional parameter most frequently employed in preclinical research. However, there is considerable conflict regarding the effects of anesthetic agents on LVEF. This study aimed at assessing the effects of various anesthetic agents on LVEF in hamsters using transthoracic echocardiography. Twelve female hamsters were submitted to echocardiography imaging separated by 1-week intervals under the following conditions: 1) conscious animals, 2) animals anesthetized with isoflurane (inhaled ISO, 3 L/min), 3) animals anesthetized with thiopental (TP, 50 mg/kg, intraperitoneal), and 4) animals anesthetized with 100 mg/kg ketamine plus 10 mg/kg xylazine injected...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Echocardiography; Anesthetics; Systolic function; Hamsters.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2016001000602

Rats with high left ventricular end-diastolic pressure can be identified by Doppler echocardiography one week after myocardial infarction
Provedor de dados: Brazilian Journal of Medical and Biological Research
Autores: Saraiva,R.M.; Kanashiro-Takeuchi,R.M.; Antonio,E.L.; Campos,O.; Tucci,P.J.F.; Moisés,V.A.
The severity of left ventricular (LV) dysfunction in rats with myocardial infarction (MI) varies widely. Because homogeneity in baseline parameters is essential for experimental investigations, a study was conducted to establish whether Doppler echocardiography (DE) could accurately identify animals with high LV end-diastolic pressure as a marker of LV dysfunction soon after MI. Direct measurements of LV end-diastolic pressure were made and DE was performed simultaneously 1 week after surgically induced MI (N = 16) or sham-operation (N = 17) in female Wistar rats (200 to 250 g). The ratio of peak early (E) to late (A) diastolic LV filling velocities and the ratio of E velocity to peak early (Em) diastolic myocardial velocity were the best predictors of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Heart failure; Myocardial infarction; Echocardiography; Hemodynamics.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2007001100016

Early neonatal echocardiographic findings in an experimental rabbit model of congenital diaphragmatic hernia
Provedor de dados: Brazilian Journal of Medical and Biological Research
Autores: Manso,P.H.; Figueira,R.L.; Prado,C.M.; Gonçalves,F.L.; Simões,A.L.B.; Ramos,S.G.; Sbragia,L.
This study aimed to demonstrate that congenital diaphragmatic hernia (CDH) results in vascular abnormalities that are directly associated with the severity of pulmonary hypoplasia and hypertension. These events increase right ventricle (RV) afterload and may adversely affect disease management and patient survival. Our objective was to investigate cardiac function, specifically right ventricular changes, immediately after birth and relate them to myocardial histological findings in a CDH model. Pregnant New Zealand rabbits underwent the surgical procedure at 25 days of gestation (n=14). CDH was created in one fetus per horn (n=16), and the other fetuses were used as controls (n=20). At term (30 days), fetuses were removed, immediately dried and weighed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Congenital diaphragmatic hernia; Right ventricle; Pulmonary arterial hypertension; Echocardiography.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2015000300234

Minor segmental wall motion abnormalities detected in patients with Chagas' disease have adverse prognostic implications
Provedor de dados: Brazilian Journal of Medical and Biological Research
Autores: Pazin-Filho,A.; Romano,M.M.D.; Almeida-Filho,O.C.; Furuta,M.S.; Viviani,L.F.; Schmidt,A.; Marin-Neto,J.A.; Maciel,B.C.
Recent data from our laboratory have shown that patients with the indeterminate form of Chagas' disease can have impairment of left ventricular contractility, as evaluated by the slope of the left ventricle end-systolic pressure-dimension relationship. We also showed that Chagas' disease patients with minimal baseline wall motion abnormalities detected by two-dimensional echocardiography have more intense contractility impairment when compared to patients with the indeterminate form of the disease without this abnormality. The prognostic implications of these findings have not been established. We evaluated 59 patients (37-76 years, mean = 55 years) with different clinical forms of Chagas' disease, who had normal left ventricular global systolic function...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Echocardiography; Chagas' disease; Left ventricular function; Indeterminate form of Chagas' disease.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006000400008

Noninvasive prognostic markers for cardiac death and ventricular arrhythmia in long-term follow-up of subjects with chronic Chagas' disease
Provedor de dados: Brazilian Journal of Medical and Biological Research
Autores: Benchimol-Barbosa,P.R.
The objective of the present study was to investigate clinical, echocardiographic and electrocardiographic (12-lead resting ECG, 24-h ambulatory ECG monitoring and signal-averaged ECG (SAECG)) parameters in subjects with chronic Chagas' disease in a long-term follow-up as prognostic markers for adverse outcomes. Fifty adult outpatients (34 to 74 years old, 31 females) staged according to Los Andes class I, II or III and complaining of palpitation were enrolled in a longitudinal study. SAECG was analyzed in time and frequency domains and the endpoint was a composite of cardiac death and ventricular tachycardia. During a follow-up of 84.2 ± 39.0 months, 34.0% of the patients developed adverse outcomes (9 cardiac deaths and 11 episodes of ventricular...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chagas' disease; Cardiomyopathy; Noninvasive prognostic assessment; Long-term follow-up study; Echocardiography; Electrocardiography.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2007000200003

Association of angiotensin-converting enzyme activity and polymorphism with echocardiographic measures in familial and nonfamilial hypertrophic cardiomyopathy
Provedor de dados: Brazilian Journal of Medical and Biological Research
Autores: Buck,P.C.; Fernandes,F.; Arteaga,E.; Matsumoto,A.Y.; Araujo,A.Q.; Oliveira,E.M.; Ianni,B.M.; Ramires,F.J.A.; Krieger,J.E.; Mady,C.
Angiotensin-converting enzyme (ACE) activity and polymorphism contribute significantly to the prognosis of patients with cardiomyopathy. The aim of this study was to determine the activity and type of ACE polymorphism in patients with familial and nonfamilial hypertrophic cardiomyopathy (HCM) and to correlate these with echocardiographic measurements (echo-Doppler). We studied 136 patients (76 males) with HCM (69 familial and 67 nonfamilial cases). Mean age was 41 ± 17 years. DNA was extracted from blood samples for the polymerase chain reaction and the determination of plasma ACE levels. Left ventricular mass, interventricular septum, and wall thickness were measured. Mean left ventricular mass index, interventricular septum and wall thickness in familial...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Echocardiography; ACE activity; ACE polymorphism; Hypertrophic cardiomyopathy; Left ventricular mass index.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2009000800005

A pulsatile flow model for in vitro quantitative evaluation of prosthetic valve regurgitation
Provedor de dados: Brazilian Journal of Medical and Biological Research
Autores: Giuliatti,S.; Gallo Jr.,L.; Almeida-Filho,O.C.; Schmidt,A.; Marin-Neto,J.A.; Pelá,C.A.; Maciel,B.C.
A pulsatile pressure-flow model was developed for in vitro quantitative color Doppler flow mapping studies of valvular regurgitation. The flow through the system was generated by a piston which was driven by stepper motors controlled by a computer. The piston was connected to acrylic chambers designed to simulate "ventricular" and "atrial" heart chambers. Inside the "ventricular" chamber, a prosthetic heart valve was placed at the inflow connection with the "atrial" chamber while another prosthetic valve was positioned at the outflow connection with flexible tubes, elastic balloons and a reservoir arranged to mimic the peripheral circulation. The flow model was filled with a 0.25% corn starch/water suspension to improve Doppler imaging. A continuous flow...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Flow model; Echocardiography; Valvular regurgitation.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2000000300013

Diastolic function is associated with quality of life and exercise capacity in stable heart failure patients with reduced ejection fraction
Provedor de dados: Brazilian Journal of Medical and Biological Research
Autores: Bussoni,M.F.; Guirado,G.N.; Roscani,M.G.; Polegato,B.F.; Matsubara,L.S.; Bazan,S.G.Z.; Matsubara,B.B.
Exercise capacity and quality of life (QOL) are important outcome predictors in patients with systolic heart failure (HF), independent of left ventricular (LV) ejection fraction (LVEF). LV diastolic function has been shown to be a better predictor of aerobic exercise capacity in patients with systolic dysfunction and a New York Heart Association (NYHA) classification ≥II. We hypothesized that the currently used index of diastolic function E/e' is associated with exercise capacity and QOL, even in optimally treated HF patients with reduced LVEF. This prospective study included 44 consecutive patients aged 55±11 years (27 men and 17 women), with LVEF&lt;0.50 and NYHA functional class I-III, receiving optimal pharmacological treatment and in a stable clinical...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Echocardiography; Left ventricular dysfunction; Six-minute walk test; Dyspnea.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2013000900803

Echocardiographic evaluation of dogs subjected to different protocols of anesthetic induction
Provedor de dados: Ciência Rural
Autores: Cardoso,Helena Mondardo; Tocheto,Ronise; Padilha,Vanessa Sasso; Silva,Gizelli; Comassetto,Felipe; Andrade,James Newton Bizetto Meira de; Oleskovicz,Nilson.
ABSTRACT:  The objective of this study was to investigate the echocardiographic changes during anesthesia induction in dogs sedated with acepromazine (0.05mg/kg) and butorphanol (0.3mg/kg) (AB). Twenty-four male dogs, with a mean weight of 12.40kg±3.1kg, were randomly assigned to 4 groups (n=6). Fifteen minutes after administering pre-anesthetic medication, anesthesia with diazepam (0.5mg/kg) and etomidate (1mg/kg) (group DE); diazepam (0.5mg/kg) and ketamine (3mg/kg) (group CD); propofol (4mg/kg) (group P); or ketamine (1mg/kg) and propofol (3mg/kg) (group CP) was administered to the 6 dogs in each group. Systolic blood pressure (SBP) was measured and echocardiography was performed immediately prior to the application of the sedation protocol (baseline),...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Echocardiography; Dogs; Sedation; Induction.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000800602

Pulsed-wave tissue Doppler imaging of the myocardium of cats with induced thyrotoxicosis
Provedor de dados: Ciência Rural
Autores: Oliveira,Daniel Capucho de; Borlini,Daniel Cometti; Santos,Warley Gomes dos; Monteiro,Jessica Nascimento Moraes; Costa,Lorena Adão Vescovi Séllos; Sobrinho,Aloir Queiroz Araújo; Costa,Fabiano Séllos.
Left ventricular myocardial motion was quantified using pulsed-wave tissue Doppler imaging (PW-TDI) in nine adult cats before and after thyrotoxicosis induction. In order to induce thyrotoxicosis, all cats were given 150µg kg-1 of levothyroxine sodium as a single oral dose each day for 10 weeks. PW-TDI examinations were performed immediately before the induction and by the end of the experimental protocol. An increase in myocardial motion velocity was documented at the interventricular septum level, demonstrated by an elevation in systolic (Sa), and early (Ea) and late (Aa) diastolic waves (P&lt;0.05). However, no alteration in Sa, Ea and Aa values was seen at the lateral mitral annulus. Heart rate increased significantly between the experimental stages,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cat; Echocardiography; Hyperthyroidism; Tissue Doppler imaging.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782011000600017

Cardiac index by thermodilution or transthoracic echocardiography in dogs at different hemodynamic states
Provedor de dados: Ciência Rural
Autores: Gehrcke,Martielo Ivan; Cardoso,Helena Mondardo; Regalin,Doughlas; Silva,Gizelli da; Padilha,Vanessa Sasso; Moraes,Aury Nunes de; Oleskovicz,Nilson.
ABSTRACT: Proper monitoring of cardiac index (CI) in critically ill patients requires accurate and minimally invasive methods. The aim of this study was to compare the CI values obtained by thermodilution or echocardiography using different methods in dogs in different hemodynamic states. Nine dogs weighing 19.6±1.3kg were anesthetized with isoflurane at 1.4V% (Baseline) and subjected to mechanical ventilation (MV),a hypodynamic state (Hypo) with isoflurane at 3.5V% and hyperdynamic state (hyper) with dobutamine infusion at 5μgkg-1min-1. CI analysis was performed by thermodilution (TD) and using the modified Simpson's method, aortic velocity-time integral (A-VTI) method and pulmonary VTI (P-VTI) method. We performed Pearson's correlation and Bland-Altman...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cardiac index; Hypotension; Echocardiography; Bland-altman.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016001102049