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1.
Cardiovasc Ultrasound ; 5: 31, 2007 Sep 26.
Article in English | MEDLINE | ID: mdl-17897450

ABSTRACT

BACKGROUND: In patients with advanced non-ischemic cardiomyopathy (NIC), right-sided cardiac disturbances has prognostic implications. Right coronary artery (RCA) flow pattern and flow reserve (CFR) are not well known in this setting. The purpose of this study was to assess, in human advanced NIC, the RCA phasic flow pattern and CFR, also under right-sided cardiac disturbances, and compare with left coronary circulation. As well as to investigate any correlation between the cardiac structural, mechanical and hemodynamic parameters with RCA phasic flow pattern or CFR. METHODS: Twenty four patients with dilated severe NIC were evaluated non-invasively, even by echocardiography, and also by cardiac catheterization, inclusive with Swan-Ganz catheter. Intracoronary Doppler (Flowire) data was obtained in RCA and left anterior descendent coronary artery (LAD) before and after adenosine. Resting RCA phasic pattern (diastolic/systolic) was compared between subgroups with and without pulmonary hypertension, and with and without right ventricular (RV) dysfunction; and also with LAD. RCA-CFR was compared with LAD, as well as in those subgroups. Pearson's correlation analysis was accomplished among echocardiographic (including LV fractional shortening, mass index, end systolic wall stress) more hemodynamic parameters with RCA phasic flow pattern or RCA-CFR. RESULTS: LV fractional shortening and end diastolic diameter were 15.3 +/- 3.5 % and 69.4 +/- 12.2 mm. Resting RCA phasic pattern had no difference comparing subgroups with vs. without pulmonary hypertension (1.45 vs. 1.29, p = NS) either with vs. without RV dysfunction (1.47 vs. 1.23, p = NS); RCA vs. LAD was 1.35 vs. 2.85 (p < 0.001). It had no significant correlation among any cardiac mechanical or hemodynamic parameter with RCA-CFR or RCA flow pattern. RCA-CFR had no difference compared with LAD (3.38 vs. 3.34, p = NS), as well as in pulmonary hypertension (3.09 vs. 3.10, p = NS) either in RV dysfunction (3.06 vs. 3.22, p = NS) subgroups. CONCLUSION: In patients with chronic advanced NIC, RCA phasic flow pattern has a mild diastolic predominance, less marked than in LAD, with no effects from pulmonary artery hypertension or RV dysfunction. There is no significant correlation between any cardiac mechanical-structural or hemodynamic parameter with RCA-CFR or RCA phasic flow pattern. RCA flow reserve is still similar to LAD, independently of those right-sided cardiac disturbances.


Subject(s)
Cardiomyopathies/diagnostic imaging , Coronary Circulation , Coronary Stenosis/diagnostic imaging , Coronary Vessels/diagnostic imaging , Ventricular Dysfunction, Left/diagnostic imaging , Echocardiography , Female , Humans , Male , Middle Aged , Myocardial Ischemia/diagnostic imaging , Pulsatile Flow
2.
In. Pastore, Carlos Alberto; Grupi, César José; Moffa, Paulo Jorge. Eletrocardiologia atual: curso de eletrocardiologia do InCor. São Paulo, Atheneu, 2006. p.177-194, ilus, tab.
Monography in Portuguese | LILACS | ID: lil-441358
3.
Rev. bras. hipertens ; 5(3): 161-72, jul.-set. 1998. ilus, graf
Article in Portuguese | LILACS | ID: lil-254152

ABSTRACT

Neste relato foram revisados alguns conceitos de geometria e função ventricular, o papel da ecocardiografia na avaliação da estrutura e função do ventrículo esquerdo na hipertensão arterial, a análise dos recursos metodológicos para esse fim, a importância desse método de diagnóstico por imagem na investigação da fisiopatologia do acometimento ventricular, bem como as respectivas limitações diante dos diferentes métodos de avaliação ecocardiográfica.


Subject(s)
Humans , Male , Female , Ventricular Function, Left/physiology , Hypertension , Echocardiography , Hypertrophy, Left Ventricular , Systole/physiology , Heart Ventricles/anatomy & histology
4.
Rev. bras. hipertens ; 5(3): 175-88, jul.-set. 1998. ilus, graf
Article in Portuguese | LILACS | ID: lil-254153

ABSTRACT

O estudo da função diastólica tem recebido crescente interesse, sobretudo na avaliação do acometimento do ventrículo esquerdo na presença de hipertensão arterial. A ecocardiografia tem contribuído muito para o maior entendimento na fisiologia da diástole, bem como para a ampliação da avaliação não-invasiva da função diastólica nas diferentes cardiopatias. A aplicação do método Doppler causou grande impacto na investigação clínica e científica, porém deve sempre ser analisada em conjunto com as demais informações ecocardiográficas, estruturais e funcionais do coração, assim como com a clínica do paciente. A ecocardiografia também tem seu papel nos estudos realizados em conjunto com a avaliação hemodinâmica invasiva, principalmente na análise da distensibilidade ventricular. Neste relato foram revisados a aplicação e o método ecocardiográfico, bem como alguns aspectos fisiopatológicos, na avaliação da função diastólica do ventrículo esquerdo.


Subject(s)
Humans , Ventricular Function, Left/physiology , Hypertension , Diastole/physiology , Echocardiography, Doppler
5.
Arq. bras. cardiol ; 67(6): 395-400, Dez. 1996. ilus, tab
Article in Portuguese | LILACS | ID: lil-319223

ABSTRACT

PURPOSE: To investigate the short-term effects of the partial ventriculectomy (resection of lateral wall associated to mitral annuloplasty) on cardiac mechanics, contractility, shape and geometry of the left ventricle (LV). METHODS: Eleven male patients with severe congestive heart failure due to dilated cardiomyopathy were studied. The mean age was 51 +/- 7 years and the functional class was III (five patients) or IV (six patients) before the surgery. Patients were evaluated before and at 17 +/- 4 days after the surgery by simultaneous LV pressure and echocardiographic data. End-diastolic pressure (EDP-mmHg), wall stress (EDS-g/cm2) and diameter (EDD-cm); endsystolic wall stress (ESS) and diameter (ESD), fractional shortening (FS-) and maximal elastance (Emax-mmHg/ cm/s); the diastolic slope of the pressure-diameter (Kp-mmHg/cm) and stress-strain (Km-g/cm2) loops; shape (L/ EDD, adimensional, where L is the LV long axis) and geometry (Th/EDD, adimensional, where TH is the LV diastolic thickness) were obtained. RESULTS: 1) The ressected muscle fragments (diamond shape) were 10.8 +/- 1.3 cm in length and 5 +/- 0.6 cm in width; 2) all patients were discharged from hospital (15-29 days) in class I (eight cases), II (two), and III (one); 3) it was observed a decrease in EDP (24.3 +/- 7.7 x 17.5 +/- 3.2, p = 0.016); in EDD (8.0 +/- 0.7 x 7.2 +/- 0.8, p = 0.002); in EDS (57.9 +/- 26.8 x 37.4 +/- 19.2, p = 0.005); in ESS (199 +/- 46.9 x 102.8 +/- 33.1, p = 0.004); in ESD (7.1 +/- 0.7 x 5.7 +/- 0.8, p < 0.001); in Kp (22.3 +/- 15.9 x 11.5 +/- 6.9, p = 0.014); and in K(m) (467.4 +/- 212 x 214.6 +/- 87.4, p = 0.01); and, 4) it was noted an increase in FS (11.5 +/- 1.8 x 19.8 +/- 3.9, p < 0.001); in Emax (13.8 +/- 2.2 x 18.6 +/- 3.2, p < 0.001); and in L/EDD (1.32 +/- 0.1 x 1.47 +/- 0.13, p < 0.007) and Th/Dd (0.11 +/- 0.04 x 0.17 +/- 0.08, p < 0.038). CONCLUSION: The partial ventriculectomy showed multiple significant beneficial effects in these dilated myopathic hearts.


Subject(s)
Humans , Male , Adult , Middle Aged , Cardiomyopathy, Dilated , Heart Ventricles/surgery , Elasticity , Electrocardiography , Cardiac Surgical Procedures , Myocardial Contraction , Ventricular Function , Hemodynamics , Postoperative Period
6.
Arq. bras. cardiol ; 67(2): 87-91, ago. 1996. tab
Article in Portuguese | LILACS | ID: lil-199319

ABSTRACT

OBJETIVO - Avaliar os efeitos agudos da ibopamina (IBO) sobre a mecânica e a contrabilidade miocárdica em pacientes com insuficiência cardíaca congestiva (ICC)refratária secundária à cardiomiopatia dilatada idiopática.MÉTODOS- Foram estudados 10 pacientes (idade= 43+-7anos) do sexo masculino, em ritmo sinusal, com cardiomiopatia dilatada idiopática e ICC refratária.Foram realizados estudos ecocardiográficos e hemodinâmicos (cateter micro-tip) simultâneos, antes (basal) e após (20,40 e 60min) à administraçäo de um comprimido de 200mg de IBO.Para cada fase obtidas as relaçöes pressäo/diâmetro e esforço/de formaçäo do ventrículo esquerdo (VE).A partir destas relaçöes foram analisados:frequência cardíaca (FC-bpm), débito cardíaco (DC-L/m), pressäo diastólica final (PDF-mmHg); fraçäo de encurtamento (D por cento); elastância máxima (E máx - mmHg/cm/s);esforços sistólico final (ESF-g/cm2) e diastólito final (EDF-g/cm2); rididez da cavidade (Kp-mmHg/cm) e do músculo cardíaco (Km-g/cm2);e tempo da constante de relaxamento (Tau-ms).RESULTADOS- Na condiçäo basal e aos 20,40 e 60min após a administraçäo da IBO, näo houve variaçäo significante na FC (99+-7;99+-8e99+-10), e foram observados aumentos signifacantes do DC (4,13+-1,28;4,95+-1,38;5,13+-1,86;5,18+-1,57), do D por cento (13,7+-2,4;15,4+-2,8;15,9+-1,8;16,1+-2,0), e da E máx (14,8+-3,2;16+-3,6;17,7+-4,2;17,6+-4,2).Houve mudanças significativas, com aumento transitório inicial seguido de diminuiçäo da PDF ( 26,3+-4,2;30,6+-6,4;24,6+-5,6;22,3+-4,6) do EDF (79,7+-22,8;91,7+-29,6;79+-31;63+-17,3) e do Kp (27,2+-12,6;60+-26,7;27,9+-11,7;28+-11).CONCLUSAO - A IBO produziu efeito benéfico na funçäo sistólica e diastólica do VE, bem como aumentou a contratilidade em pacientes com insuficiência cardíaca severa devido à cardiomiopatia dilatada idiopática


Purpose - The effects of ibopamine (IBO) on left ventricular (LV) mechanics and contractility have not been described. The aim of this study was to test the hypothesis that IBO has a contractile effect at a dose of 200mg. Methods - Ten male patients (43±7 years) with refractory heart failure due to idiopathic dilated cardiomyopathy were studied. The patients were submitted to simultaneous echo-Doppler and hemodynamic (microtip catheter) studies, before (B) and after (20, 40 and 60 minutes) a dose of 200mg of IBO. LV pressure/diameter and stress/strain relations were obtained. Subsequently, heart rate (HR-bpm), cardiac output (CO-L/m), end-diastolic pressure (EDPmmHg); fractional shortening (FS-%); maximal elastance (Emax-mmHg/cm/s); end systolic (ESS-g/cm2) and enddiastolic (EDS-g/cm2) stress; chamber (Kp-mmHg/cm) andmuscle (Km-g/cm2) stiffness, and the time of constant relaxation (Tau-ms) were analyzed. Results - Results were presented as mean ± standard deviation for conditions before and after IBO (20, 40 and 60 minutes) respectively. There was no change in HR (99±7; 100±7; 99±8; 99±10). Significant increa ses were observed in CO (4.13±1.28; 4.95±1.38; 5.13±1.86;5.18±1.57), FS (13.7±2.4; 15.4±2.8; 15.9±1.8; 16.1±2.0), and Emax (14.8±3.2; 16±3.6; 17.7±4.2; 17.6±4.2). A transient (20 minutes) increase followed by a decrease (40 and 60 minutes) ocurred in EDP (26.3±4.2; 30.6±6.4; 24.6±5.6; 22.3±4.6), EDS (79.7±22.8; 91.7±29.6; 79±31; 63±17.3), and Kp (27.2±12.6; 60±26.7; 27.9±11.7; 28.1±11). Conclusion - IBO has a beneficial effect on LV systolic and diastolic function as well as on contractility in patients with heart failure due to idiopathic dilated cardiomyopathy


Subject(s)
Humans , Male , Adult , Middle Aged , Cardiomyopathies , Myocardial Contraction , Ventricular Function , Heart Failure
7.
Arq. bras. cardiol ; 63(6): 465-468, dez. 1994. tab
Article in Portuguese | LILACS | ID: lil-155776

ABSTRACT

Objetivo - Avaliar se a lipoproteína (a) [Lp(a)], apolipoproteína (apo) A1, apo B e perfil lipídico plasmático (PL) diferem os pacientes transplantados (TC) dos portadores de doença arterial coronariana (DAC) e os sem DAC (NL) e se o PL evidencia pacientes com doença coronariana do transplante (DCT). Métodos - Foram estudados 170 pacientes divididos em 3 grupos: I) TC [n= 43, 46 + ou - 15 anos, 24 meses (mediana) após o transplante], 28 submetidos a angiografia coronariana serial após o 1§ ano de cirurgia [subgrupos com DCT (n=9) e sem DCT (NDCT) (n=19)]; II) DAC (n=72, 48 + ou - 6 anos); III) NL (n=45, 50 + ou - 6 anos). Resultados - O grupo TC apresentou níveis maiores de apo A1 que DAC e NL [(1,5 + ou - 0,5 vs 1,2 + ou - 0,05 vs 1,1 + ou - 0,06 g/l, p<0,05). A apo B foi maior no DAC que TC e NL (1,5 + ou - 0,05 vs 1,2 + ou - 0,7 vs 1,3 + ou - 0,09 g/l p<0,05). A Lp(a) tendeu a ser maior em TC e DAC que NL [25 (2-97), 24(1-130) e 15 (1-100)mg/dl, p=0,05)]. Quando avaliados pareadamente vs os NL a Lp(a) foi maior nos TC e DAC (p=0,019 e 0,03). O PL näo diferiu entre DCT e NDCT. Conclusäo - Aumentos da Lp(a) após o transplante poderiam estar relacionados a elevada prevalência de DCT. O PL näo discriminou a DCT


Subject(s)
Humans , Male , Female , Adult , Middle Aged , Coronary Disease/etiology , Apolipoprotein A-I/blood , Apolipoproteins B/blood , Lipids/blood , Lipoprotein(a)/blood , Heart Transplantation/adverse effects , Case-Control Studies , Prevalence , Risk Factors , Follow-Up Studies , Analysis of Variance
8.
Rev. bras. cir. cardiovasc ; 9(2): 69-80, abr.-jun. 1994. ilus, tab, graf
Article in Portuguese | LILACS | ID: lil-164382

ABSTRACT

O presente estudo tem por finalidade analisar tardiamente o padrao anatômico evolutivo das artérias coronárias do coraçao transplantado. Para cumprir tal proposiçao foram selecionados 22 pacientes submetidos ao transplante cardíaco ortotópico, com seguimento pós-operatório superior a 36 meses. As variáveis eleitas para este fim foram aferidas anualmente até o quinto ano de pós-operatório. A análise da ventriculografia mostrou a estabilidade da fraçao de ejeçao (p=O,99) em valores normais. A cineangiocoronariografia seqüencial evidenciou incidência crescente de lesoes arteriais com comprometimento da funçao contrátii. As lesoes obstrutivas acometeram as artérias coronárias difusamente, com predomínio no território distal. Os episódios de rejeiçao aguda e a etiologia da cardiomiopatia nao modificaram a evoluçao natural da aterosclerose coronária.


Subject(s)
Humans , Coronary Disease/etiology , Heart Transplantation/adverse effects , Cardiomyopathies , Cineangiography , Coronary Vessels/pathology , Follow-Up Studies , Retrospective Studies , Stroke Volume
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