Intervençöes coronarias através da artéria radial / Transradial approach for coronary interventions

OBJECTIVE: To assess the feasibility and safety of coronary interventions performed through the radial artery. METHODS: We studied 103 patients with ages from 38 to 86 years (57 + or -8.7), 90 (87 percent) males, and: radial pulse with a good amplitude, presence of ulnar pulse, a good collateral flow through the palmar arch assessed with the Allen's test. RESULTS: The vascular approach was obtained in 97 (94 percent) patients, 88 (91 percent) treated electively and 9 (9 percent) during acute myocardial infarction, for primary angioplasty; 56 (64 percent) unstable angina; 22 (25 percent) stable angina; 10 (11 percent) were asymptomatic, 6 referred for recanalization of chronic occlusion and 4 silent ischemia in the first week after acute myocardial infarction. We approached 107 arteries: anterior descending artery, 49 (46 percent); right coronary artery, 27 (25 percent); circumflex artery, 25 (23 percent); diagonal artery, 6 (6 percent); and 2 saphenous vein bypass grafts. We treated 129 lesions: 80 (62 percent) B2 type; 23 (18 percent) B1 type; 17 (13 percent) C type; and 9 (7 percent). A type. There were 70 stents , and 59 balloon angioplasties performed. Thirty-two (33 percent) patients used GP IIb/IIIa inhibitors. The mean duration of the elective procedure was 42.3Ý12.8 min. Success, correct stent deployment and residual lesion <20 percent, was reached in 100 percent of the lesions treated with stent implantation; arterial dilation with residual lesion <50 percent was obtained in 96 percent of the lesions treated with transluminal coronary angioplasty (TCA). Complications, were: 1 (1.0 percent) non-Q-wave acute myocardial infarction; 2 (2 percent) hematomas in the forearm; and 2 losses of radial pulse. CONCLUSION: Radial artery aproach is practical and safe for percutaneous coronary interventions there was a low incidence of complications

Segurança e eficácia da angioplastia com implante de stent intracoronariano em pacientes com síndromes coronarianas instáveis: comparaçäo com síndromes coronarianas estáveis / Safety and efficacy of angioplasty with intracoronary stenting in patients with unstable coronary syndromes: comparison with stable coronary syndromes

OBJECTIVE: To assess safety and efficacy of coronary angioplasty with stent implantation in unstable coronary syndromes. METHODS: Retrospective analysis of in-hospital and late evolution of 74 patients with unstable coronary syndromes (unstable angina or infarction without elevation of the ST segment) undergoing coronary angioplasty with stent placement. These 74 patients were compared with 31 patients with stable coronary syndromes (stable angina or stable silent ischemia) undergoing the same procedure. RESULTS: No death and no need for revascularization of the culprit artery occurred in the in-hospital phase. The incidences of acute non-Q-wave myocardial infarction were 1.4 percent and 3.2 percent (p=0.6) in the unstable and stable coronary syndrome groups, respectively. In the late follow-up (11.2+/-7.5 months), the incidences of these events combined were 5.7 percent in the unstable coronary syndrome group and 6.9 percent (p=0.8) in the stable coronary syndrome group. In the multivariate analysis, the only variable with a tendency to significance as an event predictor was diabetes mellitus (p=0.07; OR=5.2; 95 percent CI=0.9-29.9). CONCLUSION: The in-hospital and late evolutions of patients with unstable coronary syndrome undergoing angioplasty with intracoronary stent implantation are similar to those of the stable coronary syndrome group, suggesting that this procedure is safe and efficacious when performed in unstable coronary syndrome patients.

O papel da heparina de baixo peso molecular na angina instável, infarto agudo do miocárdio e pós-angioplastia percutânea transluminal coronária eletiva / The role of low-molecular-weight heparin in unstable angina, acute myocardial infarction and post-elective percutaneous transluminal coronary angioplasty

PURPOSE: To evaluate the clinical efficacy and safety of subcutaneous (SC) low molecular weight heparin (LMWH) compared to intravenous (IV) non fractioned heparin (NFH) in unstable angina, acute myocardial infarction and post-percutaneous transluminal coronary angioplasty. METHODS: From September/92 to April/94, 314 patients were randomized in two groups. Group I-- 154 patients treated with SC LMWH, using in the 1st phase SC LMWH with a dosage of 160 UaXa IC/kg/day (group IA--92 patients), and in the 2nd, a dosage of 320 UaXa IC/kg/day (group IB--62 patients). Group II--160 patients treated with IV NFH 100UI/kg (bolus), followed by 1000UI/h with adjusted dosage by activated partial thromboplastin time. RESULTS: There was not a statistically significant difference among the three groups in relation to cardiac events, hemorrhagic complications and deaths. CONCLUSION: The clinical efficacy and safety of SC LMWH in patients with unstable angina, acute myocardial infarction and post-percutaneous transluminal coronary angioplasty were similar to IV NFH with the dosages used in this study.

Objetivo - Comparar a eficácia clínica e segurança da heparina de baixo peso molecular (HPBM) subcutânea (SC) à da heparina não fracionada (HNF) intravenosa (IV) na angina instável, infarto agudo do miocárdio (IAM) e pós-angioplastia percutânea transluminal coronária. Métodos - De setembro/92 a abril/94, foram randomizados 314 pacientes, em 2 grupos: grupo 1 com 154 pacientes, tratados com HBPM via SC, usando na 1ª fase a dose de 160 UaXa IC/kg/dia (grupo IA - 92 pacientes) e na 2ª, a dose de 320 UaXalC/kgldia (grupo IB - 62 pacientes); grupo II com 160 pacientes, tratados com HNF via IV, 100UI/kg (bolus), seguido de 1000UI/h, infusão contínua, ajustando-se a dose de acordo como tempo de tromboplastina parcial ativado (TTPa). Resultados - Não houve diferença estatisticamente significante entre os três grupos em relação a eventos cardíacos, complicações hemorrágicas e óbitos. Conclusão - A eficácia clínica e segurança do uso da HBPM SC em pacientes com angina instável, IAM e pós-angioplastia percutânea transluminal coronária foi semelhante à HNF IV com as doses empregadas neste estudo

Valvuloplastia mitral com cateter-baläo de Inoue: análise de 112 casos / Mitral Valvuloplasty With Inoue Balloon. Results in 112 Patients

PURPOSE--To present immediate results of percutaneous mitral valvuloplasty (PVM) with Inoue balloon for the treatment of mitral stenosis. METHODS--One hundred and twelve consecutive patients mean age 31.26 +/- 9.5 years, 82 per cent females, the majority in functional class III/IV (69 per cent ) underwent percutaneous mitral valvuloplasty (PVM) with Inoue balloon. The procedure was undertaken by the transseptal technique. RESULTS--PMV achieved significant reduction in mean left atrial pressure pre 24.57 +/- 5.37 post 12.36 +/- 4.82, mitral gradient pre 15.31 +/- 4.28 post 3.48 +/- 2.09 and increased mitral valve area pre 0.88 +/- 0.12 post 2.0 +/- 0.28 (P < 0.001). An increase of at least 25 per cent of the mitral valve area with a final result greater than 1.5 cm2 was obtained in 96 per cent of the cases. Cardiac tamponade occurred in five cases (4.4 per cent ). In 4 a successful treatment was accomplished in the catheterization laboratory. Significant mitral regurgitation was seen in one case (0.9 per cent ) and there was one death (0.9 per cent ). CONCLUSION--The results of this series attest to the effectiveness of the PMV with Inoue balloon in selected cases of mitral stenosis

Objetivo - Analisar os resultados imediatos em portadores de estenose da válvala mitral, submetidos a valvuloplastia com cateter-balão de Inoue. Métodos - Cento e doze pacientes consecutivos, com idade média de 31,26±9,5 anos, 82% do sexo feminino, a maioria em classe funcional III e IV (69%), foram submetidos a valvuloplastia mitral por balão (VMB). Os casos foram selecionados pelo escore ecocardiográfico proposto por Wilkins. O procedimento foi realizado por via transeptal segundo a técnica de Inoue. Resultados - Após VMB foi observada significativa redução da pressão média do átrio esquerdo pré 24,57±5,37/ pós 12,36±4,82, do gradiente transvalvar mitral pré 15,31±4,28/ pós 3,48±2,09 e aumento significativo da área valvar mitral (AVM) média pré 0,88±0,12/pós 2,0±0,28 (P<0,001). O sucesso definido como aumento pelo menos de 25% da AVM com resultado final maior que 1,5cm2 na ausência de insuficiência mitral significativa (3/4+), cirurgia de emergência ou óbito, foi alcançado em 96% dos casos. Como complicações, ocorreram 5 tamponamentos cardíacos (TC), 4 deles tratados na sala de hemodinâmica com sucesso; 1 paciente desenvolveu insuficiência mitral importante (3/4+), sendo operado eletivamente; ocorreu 1 óbito, devido a TC seguido de embolia pulmonar. Conclusão - Os resultados observados nesta série, comprovam a efetividade e segurança da técnica de valvuloplastia com cateter-balão Inoue, em casos selecionados de portadores de estenose mitra

Embolia arterial por projetil de arma de fogo / Arterial embolism by bullet of firearm

Um caso de embolia arterial por projetil de arma de fogo, com orifício de entrada na regiäo dorsal paravertebral direita - aorta torácica - provocando oclusäo a nível de artéria femoral comum esquerda é descrito. Os autores o comparam a outros casos da literatura, fazendo especial referência à conduta cirúrgica. Chama-se atençäo para a importância de um exame cuidadoso no momento do primeiro socorro ao paciente, pois o diagnóstico de oclusäo arterial aguda pode passar despercebido (principalmente em casos graves como este) sendo o especialista chamado tarde demais para salvar o membro isquêmico