An invertebrate smooth muscle with striated muscle myosin filaments.

Muscle tissues are classically divided into two major types, depending on the presence or absence of striations. In striated muscles, the actin filaments are anchored at Z-lines and the myosin and actin filaments are in register, whereas in smooth muscles, the actin filaments are attached to dense bodies and the myosin and actin filaments are out of register. The structure of the filaments in smooth muscles is also different from that in striated muscles. Here we have studied the structure of myosin filaments from the smooth muscles of the human parasite Schistosoma mansoni. We find, surprisingly, that they are indistinguishable from those in an arthropod striated muscle. This structural similarity is supported by sequence comparison between the schistosome myosin II heavy chain and known striated muscle myosins. In contrast, the actin filaments of schistosomes are similar to those of smooth muscles, lacking troponin-dependent regulation. We conclude that schistosome muscles are hybrids, containing striated muscle-like myosin filaments and smooth muscle-like actin filaments in a smooth muscle architecture. This surprising finding has broad significance for understanding how muscles are built and how they evolved, and challenges the paradigm that smooth and striated muscles always have distinctly different components.

[Latin American consensus on hypertension in patients with diabetes type 2 and metabolic syndrome]. / Consenso latino-americano de hipertensão em pacientes com diabetes tipo 2 e síndrome metabólica.

The present document has been prepared by a group of experts, members of cardiology, endocrinology, internal medicine, nephrology and diabetes societies of Latin American countries, to serve as a guide to physicians taking care of patients with diabetes, hypertension and comorbidities or complications of both conditions. Although the concept of metabolic syndrome is currently disputed, the higher prevalence in Latin America of that cluster of metabolic alterations has suggested that metabolic syndrome is a useful nosography entity in the context of Latin American medicine. Therefore, in the present document, particular attention is paid to this syndrome in order to alert physicians on a particular high-risk population, usually underestimated and undertreated. These recommendations result from presentations and debates by discussion panels during a 2-day conference held in Bucaramanga, in October 2012, and all the participants have approved the final conclusions. The authors acknowledge that the publication and diffusion of guidelines do not suffice to achieve the recommended changes in diagnostic or therapeutic strategies, and plan suitable interventions overcoming knowledge, attitude and behavioural barriers, preventing both physicians and patients from effectively adhering to guideline recommendations.

Consenso latino-americano de hipertensão em pacientes com diabetes tipo 2 e síndrome metabólica / Latin American consensus on hypertension in patients with diabetes type 2 and metabolic syndrome

O presente documento foi preparado por um grupo de especialistas, membros das Sociedades de Cardiologia, Endocrinologia, Medicina Interna, Nefrologia e Diabetes dos países da América Latina, para que sirva de diretriz para médicos que cuidam de pacientes com diabetes, hipertensão e fatores de risco concomitantes ou complicações de ambas as condições. Embora o conceito de síndrome metabólica seja atualmente muito discutido, a alta prevalência na América Latina do conjunto de alterações metabólicas que a compõem sugere que a síndrome metabólica é uma entidade nosográfica útil no contexto da medicina latino-americana. Devido a isso, no presente documento presta-se especial atenção a essa síndrome com a finalidade de alertar aos médicos sobre uma população particularmente de alto risco, que, por ser subestimada, não é tratada de forma adequada para os fatores de risco que constituem a síndrome metabólica. As recomendações deste documento são o resultado de apresentações e debates que ocorreram durante um encontro de dois dias em Bucaramanga (Colômbia), em outubro de 2012. Todos os participantes aprovaram as decisões finais. Os autores reconhecem que a publicação e difusão das diretrizes não serão suficientes para alcançar as mudanças recomendadas tanto em estratégias diagnósticas como terapêuticas, por isso programaram intervenções que permitirão identificar as barreiras do conhecimento, as atitudes e comportamento, o que permitirá tanto aos médicos como aos pacientes uma adequada adesão às recomendações sugeridas nestas diretrizes. Arq Bras Endocrinol Metab. 2014;58(3):205-25.

The present document has been prepared by a group of experts, members of cardiology, endocrinology, internal medicine, nephrology and diabetes societies of Latin American countries, to serve as a guide to physicians taking care of patients with diabetes, hypertension and comorbidities or complications of both conditions. Although the concept of metabolic syndrome is currently disputed, the higher prevalence in Latin America of that cluster of metabolic alterations has suggested that metabolic syndrome is a useful nosography entity in the context of Latin American medicine. Therefore, in the present document, particular attention is paid to this syndrome in order to alert physicians on a particular high-risk population, usually underestimated and undertreated. These recommendations result from presentations and debates by discussion panels during a 2-day conference held in Bucaramanga, in October 2012, and all the participants have approved the final conclusions. The authors acknowledge that the publication and diffusion of guidelines do not suffice to achieve the recommended changes in diagnostic or therapeutic strategies, and plan suitable interventions overcoming knowledge, attitude and behavioural barriers, preventing both physicians and patients from effectively adhering to guideline recommendations. Arq Bras Endocrinol Metab. 2014;58(3):205-25.

Consenso latinoamericano de hipertensión en pacientes con diabetes tipo 2 y síndrome metabólico / Latin american consensus on hypertension in patients with diabetes type 2 and metabolic syndrome

El presente documento ha sido preparado por un grupo de expertos, miembros de las sociedades de Cardiología, Endocrinología, Medicina Interna, Nefrología y Diabetes de los países de América Latina, para que sirva de guía a los médicos que cuidan a pacientes con diabetes, hipertensión y enfermedades concomitantes o complicaciones de ambas condiciones. Aunque el concepto de síndrome metabólico actualmente es discutido, la alta prevalencia en América Latina del conjunto de alteraciones metabólicas que lo conforman sugiere que el síndrome metabólico es una entidad nosográfica útil en el contexto de la medicina latinoamericana. Por lo tanto, en el presente documento se presta especial atención a este síndrome con el fin de alertar a los médicos de una particular población de alto riesgo que por lo general es subestimada y en la que no se tratan en forma óptima los factores de riego que constituyen el síndrome metabólico. Las presentes recomendaciones son el resultado de las presentaciones y los debates en los paneles de discusión durante una reunión de 2 días celebrada en Bucaramanga en octubre de 2012. Todos los participantes han aprobado las conclusiones finales. Los autores reconocen que la publicación y la difusión de las guías no serán suficientes para alcanzar los cambios recomendados tanto en las estrategias diagnósticas como terapéuticas, por lo que se han programado intervenciones que permitan identificar las barreras del conocimiento, de las actitudes y del comportamiento, lo que permitirá tanto a los médicos como a los pacientes una adecuada adherencia a las recomendaciones de las guías

The present document has been prepared by a group of experts, members of Cardiology, Endocrinology, Internal Medicine, Nephrology and Diabetes societies of Latin American countries, to serve as a guide to physicians taking care of patients with diabetes, hypertension and comorbidities or complications of both conditions. Although the concept of metabolic syndrome is currently disputed, the higher prevalence in Latin America of that cluster of metabolic alterations has suggested that metabolic syndrome is useful nosography entity in the context of Latin American medicine. Therefore, in the present document, particular attention is paid to this syndrome in order to alert physicians on a particular high- risk population, usually underestimated and undertreated. These recommendations results from presentation and debates by discussion panels during a 2-day conference held in Bucaramanga, in October 2012, and all the participants have approved the final conclusions. The authors acknowledge that the publication and diffusion of guidelines do not suffice to achieve the recommended changes in diagnostic or therapeutic strategies, and plan suitable interventions overcoming both physicians and patients from effectively adhering to guideline recommendations

[Latin American consensus on hypertension in patients with diabetes type 2 and metabolic syndrome]. / Consenso latinoamericano de hipertensión en pacientes con diabetes tipo 2 y síndrome metabólico.

The present document has been prepared by a group of experts, members of Cardiology, Endocrinology, Internal Medicine, Nephrology and Diabetes societies of Latin American countries, to serve as a guide to physicians taking care of patients with diabetes, hypertension and comorbidities or complications of both conditions. Although the concept of metabolic syndrome is currently disputed, the higher prevalence in Latin America of that cluster of metabolic alterations has suggested that metabolic syndrome is useful nosography entity in the context of Latin American medicine. Therefore, in the present document, particular attention is paid to this syndrome in order to alert physicians on a particular high- risk population, usually underestimated and undertreated. These recommendations results from presentation and debates by discussion panels during a 2-day conference held in Bucaramanga, in October 2012, and all the participants have approved the final conclusions. The authors acknowledge that the publication and diffusion of guidelines do not suffice to achieve the recommended changes in diagnostic or therapeutic strategies, and plan suitable interventions overcoming both physicians and patients from effectively adhering to guideline recommendations.

Consenso latinoamericano de hipertensión en pacientes con diabetes tipo 2 y síndrome metabólico / Latin american consensus of hypertension in patients with type 2 diabetes and metabolic syndrome

Resumen El presente documento ha sido preparado por un grupo de expertos, miembros de las sociedades de cardiología, endocrinología, medicina interna, nefrología y diabetes de los países de América Latina, para que sirvan de guía a los médicos que cuidan a pacientes con diabetes, hipertensión y enfermedades concomitantes o complicaciones de ambas condiciones. Aunque el concepto de síndrome metabólico actualmente es discutido, la alta prevalencia en América Latina del conjunto de alteraciones metabólicas que lo conforman sugiere que el síndrome metabólico es una entidad nosográfica común en el contexto de la medicina latinoamericana. Por lo tanto, en el presente documento se presta especial atención a este síndrome con el fin de alertar a los médicos de una particular población de alto riesgo, en la que por lo general es subestimada y no se tratan en forma optima los factores de riego que constituyen el síndrome metabólico. Las presentes recomendaciones son el resultado de las presentaciones y los debates en los paneles de discusión durante una reunión de dos días celebrada en Bucaramanga en octubre de 2012. Todos los participantes han aprobado las conclusiones finales. Los autores reconocen que la publicación y difusión de las guías no serán suficientes para alcanzar los cambios recomendados tanto en las estrategias diagnósticas como terapéuticas, por lo que se ha programado intervenciones que permitan identificar las barreras del conocimiento, de las actitudes y de comportamiento, lo que permitirá tanto a los médicos como a los pacientes una adecuada adherencia a las recomendaciones de las guías. (Acta MedColomb 2013; 38: 154-172).

Abstract The present document has been prepared by a group of experts, members of cardiology, endocrinology, internal medicine, nephrology and diabetes societies of Latin American Countries, to serve as a guide to physicians taking care of patients with diabetes, hypertension and comorbidities or complications of both conditions. Although the concept of metabolic syndrome is currently disputed, the higher prevalence in Latin America of that cluster of metabolic alterations has suggested that metabolic syndrome is useful nosography entity in the context of Latin American medicine. Therefore, in the present document, particular attention is paid to this syndrome in order to alert physicians on a particular high- risk population, usually underestimated and undertreated. These recommendations results from presentation and debates by discussion panels during a 2-day conference held in Bucaramanga, in October 2012, and all the participants have approved the final conclusions. The authors acknowledge that the publication and diffusion of guidelines do not suffice to achieve the recommended changes in diagnostic or therapeutic strategies, and plan suitable interventions overcoming both physicians and patients from effectively adhering to guideline recommendations. (Acta Med Colomb 2013; 38: 154-172)).

Consenso latinoamericano de hipertensión en pacientes con diabetes tipo 2 y síndrome metabólico / Latin american consensus on hypertension in patients with diabetes type 2 and metabolic syndrome

El presente documento ha sido preparado por un grupo de expertos, miembros de las sociedades de cardiología, endocrinología, medicina interna, nefrología y diabetes de los países de América Latina, para que sirvan de guía a los médicos que cuidan a pacientes con diabetes, hipertensión y enfermedades concomitantes o complicaciones de ambas condiciones. Aunque el concepto de síndrome metabólico actualmente es discutido, la alta prevalencia en América Latina del conjunto de alteraciones metabólicas que lo conforman sugiere que el síndrome metabólico es una entidad nosografías útil en el contexto de la medicina latinoamericana. Por lo tanto, en el presente documento se presta especial atención a este síndrome con el fin de alertar a los médicos de una particular población de alto riesgo, en la que por lo general se subestimada y no se trata en forma óptima los factores de riego que constituyen el síndrome metabólico. Las presentes recomendaciones son el resultado de las presentaciones y los debates en los paneles de discusión durante una reunión de 2 días celebrada en Bucaramanga en octubre de 2012. Todos los participantes han aprobado las conclusiones finales. Los autores reconocen que la publicación y difusión de las guías no serán suficientes para alcanzar los cambios recomendados tanto en las estrategias diagnósticas como terapéuticas, por lo que se ha programado intervenciones que permitan identificar las barreras del conocimiento, de las actitudes y de comportamiento, lo que permitirá tanto a los médicos como a los pacientes una adecuada adherencia a las recomendaciones de las guías(AU)

The present document has been prepared by a group of experts, members of cardiology, endocrinology, internal medicine, nephrology and diabetes societies of Latin American Countries, to serve as a guide to physicians taking care of patients with diabetes, hypertension and comorbidities or complications of both conditions. Although the concept of metabolic syndrome is currently disputed, the higher prevalence in Latin America of that cluster of metabolic alterations has suggested that metabolic syndrome is useful nosography entity in the context of Latin American medicine. Therefore, in the present document, particular attention is paid to this syndrome in order to alert physicians on a particular high- risk population, usually underestimated and undertreated. These recommendations results from presentation and debates by discussion panels during a 2-day conference held in Bucaramanga, in October 2012, and all the participants have approved the final conclusions. The authors acknowledge that the publication and diffusion of guidelines do not suffice to achieve the recommended changes in diagnostic or therapeutic strategies, and plan suitable interventions overcoming both physicians and patients from effectively adhering to guideline recommendations(AU)

Consenso latinommericano de hipertensión en pacentes con diabetes tipo 2 y sínndrome metabólico / Latin american consensus on hypertension in patients with type 2diabetes and meetabolic syndrome / Consenso latinoamericano de hipertensão em pacientes com diabetes tipo 2 e síndrome metabólico

El presente documento ha sido preparado por un grupo de expertos, miembros de las sociedades de cardiología, endocrinología, medicina interna, nefrología y diabetes de los países de América Latina, para que sirva de guía a los médicos que cuidan a pacientes con diabetes, hipertensión y enfermedades concomitantes o complicaciones de ambas condiciones. Aunque el concepto de síndrome metabólico actualmente es discutido, la alta prevalencia en América Latina del conjunto de alteraciones metabólicas que lo conforman sugiere que el síndrome metabólico es una entidad nosografías útil en el contexto de la medicina latinoamericana. Por lo tanto, en el presente documento se presta especial atención a este síndrome con el fin de alertar a los médicos de una particular población de alto riesgo, en la que por lo general se subestimada y no se trata en forma optima los factores de riego que constituyen el síndrome metabólico. Las presentes recomendaciones son el resultado de las presentaciones y los debates en los paneles de discusión durante una reunión de 2 días celebrada en Bucaramanga en octubre de 2012. Todos los participantes han aprobado las conclusiones finales. Los autores reconocen que la publicación y difusión de las guías no serán suficientes para alcanzar los cambios recomendados, tanto en las estrategias diagnósticas como terapéuticas, por lo que se ha programado intervenciones que permitan identificar las barreras del conocimiento, de las actitudes y de comportamiento, lo que permitirá tanto a los médicos como a los pacientes una adecuada adherencia a las recomendaciones de las guías.

The present document has been prepared by a group of experts, members of cardiology, endocrinology, internal medicine, nephrology and diabetes societies of Latin American Countries, to serve as a guide to physicians taking care of patients with diabetes, hypertension and comorbidities or complications of both conditions. Although the concept of metabolic syndrome is currently disputed, the higher prevalence in Latin America of that cluster of metabolic alterations has suggested that metabolic syndrome is useful nosography entity in the context of Latin American medicine. Therefore, in the present document, particular attention is paid to this syndrome in order to alert physicians on a particular high- risk population, usually underestimated and undertreated. These recommendations results from presentation and debates by discussion panels during a 2-day conference held in Bucaramanga, in October 2012, and all the participants have approved the final conclusions. The authors acknowledge that the publication and diffusion of guidelines do not suffice to achieve the recommended changes in diagnostic or therapeutic strategies, and plan suitable interventions overcoming both physicians and patients from effectively adhering to guideline recommendations.

O presente documento tem sido preparado por um grupo de expertos, membros das sociedades de cardiologia, endocrinologia, medicina interna, nefrologiae diabetes dospaíses da América Latina, para que sirva de guia aos médicos que tomam conta de pacientes com diabetes, hipertensãoe enfermidades concomitantes ou complicaçõesdas duas condições. Porémoconceito de síndrome metabólico atualmente é discutido, a alta prevalênciana América Latina do conjunto de alterações metabólicas que o conformam,sugereque o síndrome metabólico é uma entidade nosográfica útil no contexto da medicina latino americana. Pelo tanto, no presente documento se presta especial atenção a este síndrome comofim de alertar aos médicos de una particular população de alto risco,a qual pelo geralé subestimada e não se trata em forma ótimaosfatores de risco que constituemo síndrome metabólico. As presentes recomendações sãoo resultado das apresentaçõeseos debates nos painéis de discussão durante una reunião de 2 dias celebrada em Bucaramanga em outubro de 2012. Todosos participantes têm aprovado as conclusões finais. Os autores reconhecem que a publicaçãoe difusão dos guias no serão suficientes para alcançar os câmbios recomendados tanto nas estratégiasdiagnósticas quanto terapêuticas, pelo que se têm programadointervenções que permitam identificar as barreiras do conhecimento, das atitudes e de comportamento, o que permitirá tanto aos médicos quanto aos pacientes una adequada aderênciaàs recomendações dos guias.

Neuropatía autonómica diabética cardiovascular / Diabetic autonomic cardiovascular neuropathy

La neuropatía autonómica diabética cardiovascular es un trastorno en el cual una alteración en la regulación del sistema nervioso cardiovascular, por parte del sistema nervioso autónomo, desemboca en una constelación de síntomas, que pueden ir desde intolerancia al ejercicio hasta muerte súbita. Si bien no se conoce su prevalencia exacta, se estima que es alta en pacientes diabéticos, particularmente en aquellos con diabetes de larga data y con presencia de otras comorbilidades. Su reconocimiento temprano puede facilitar el manejo de estos pacientes y a su vez disminuir los costos asociados a pruebas e intervenciones innecesarias con el objetivo de evitar complicaciones asociadas con la enfermedad.

Cardiac autonomic diabetic neuropathy is a condition in which impairment of the autonomic control of the cardiovascular system leads to a myriad of symptoms, ranging from mild exercise intolerance to sudden cardiac death. Even though its exact prevalence is unknown, it is believed that it is highly prevalent in patients with long-standing diabetes, particularly those who have other pathologic conditions. Early detection is expected to have a positive impact in patient treatment, lowering costs associated with unnecessary tests and treatments, while at the same time avoiding disease-related complications.

Latin American consensus on hypertension in patients with diabetes type 2 and metabolic syndrome.

The present document has been prepared by a group of experts, members of cardiology, endocrinology and diabetes societies of Latin American countries, to serve as a guide to physicians taking care of patients with diabetes, hypertension and comorbidities or complications of both conditions. Although the concept of 'metabolic syndrome' is currently disputed, the higher prevalence in Latin America of that cluster of metabolic alterations has suggested that 'metabolic syndrome' is a useful nosographic entity in the context of Latin American medicine. Therefore, in the present document, particular attention is paid to this syndrome in order to alert physicians on a particularly high-risk population, usually underestimated and undertreated. These recommendations result from presentations and debates by discussion panels during a 2-day conference held in Bucaramanga, in October 2012, and all the participants have approved the final conclusions. The authors acknowledge that the publication and diffusion of guidelines do not suffice to achieve the recommended changes in diagnostic or therapeutic strategies, and plan suitable interventions overcoming knowledge, attitude and behavioural barriers, preventing both physicians and patients from effectively adhering to guideline recommendations.

Double blind, randomized, placebo controlled clinical trial for the treatment of diabetic foot ulcers, using a nitric oxide releasing patch: PATHON.

BACKGROUND: Diabetes Mellitus constitutes one of the most important public health problems due to its high prevalence and enormous social and economic consequences. Diabetic foot ulcers are one of the chronic complications of diabetes mellitus and constitute the most important cause of non-traumatic amputation of inferior limbs. It is estimated that 15% of the diabetic population will develop an ulcer sometime in their lives. Although novel therapies have been proposed, there is no effective treatment for this pathology. Naturally produced nitric oxide participates in the wound healing process by stimulating the synthesis of collagen, triggering the release of chemotactic cytokines, increasing blood vessels permeability, promoting angiogenic activity, stimulating the release of epidermical growth factors, and by interfering with the bacterial mitochondrial respiratory chain. Topically administered nitric oxide has demonstrated to be effective and safe for the treatment of chronic ulcers secondary to cutaneous leishmaniasis. However, due to their unstable nitric oxide release, the topical donors needed to be applied frequently, diminishing the adherence to the treatment. This difficulty has led to the development of a multilayer polymeric transdermal patch produced by electrospinning technique that guarantees a constant nitric oxide release. The main objective of this study is to evaluate the effectiveness and safety of this novel nitric oxide releasing wound dressing for the treatment of diabetic foot ulcers. METHODS AND DESIGN: A double-blind, placebo-controlled clinical trial, including 100 diabetic patients was designed. At the time of enrollment, a complete medical evaluation and laboratory tests will be performed, and those patients who meet the inclusion criteria randomly assigned to one of two groups. Over the course of 90 days group 1 will receive active patches and group 2 placebo patches. The patients will be seen by the research group at least every two weeks until the healing of the ulcer or the end of the treatment. During each visit the healing process of the ulcer, the patient's health status and the presence of adverse events will be assessed. Should the effectiveness of the patches be demonstrated an alternative treatment would then be available to patients. TRIAL REGISTRATION: NCT00428727.

A randomized, double blind, cross-over, placebo-controlled clinical trial to assess the effects of Candesartan on the insulin sensitivity on non diabetic, non hypertense subjects with dysglyce mia and abdominal obesity. "ARAMIA".

BACKGROUND: The raising prevalence of type-2 diabetes mellitus and obesity has been recognized as a major problem for public health, affecting both developed and developing countries. Impaired fasting plasma glucose has been previously associated with endothelial dysfunction, higher levels of inflammatory markers and increased risk of developing insulin resistance and cardiovascular events. Besides life-style changes, the blockade of the renin-angiotensin system has been proposed as a useful alternative intervention to improve insulin resistance and decrease the number of new type-2 diabetes cases. The aim of this clinical trial is to study the effect of the treatment with Candesartan, an angiotensin II receptor antagonist, on the insulin resistance, the plasma levels of adipoquines, oxidative stress and prothrombotic markers, in a group of non diabetic, non hypertensive, dysglycemic and obese subjects. METHODS AND DESIGN: A randomized, double blind, cross-over, placebo-controlled, clinical trial was designed to assess the effects of Candesartan (up to 32 mg/day during 6 months) on the Homeostasis Model Assessment (HOMA) index, lipid profile, protrombotic state, oxidative stress and plasma levels of inflammatory markers. The participants will be recruited in the "Fundación Cardiovascular de Colombia". Subjects who fullfil selection criteria will receive permanent educational, nutritional and exercise support during their participation in the study. After a 15 days-run-in period with placebo and life-style recommendations, the patients who have a treatment compliance equal or greater than 80% will be randomlly assigned to one of the treatment groups. Group A will receive Candesartan during 6 months and placebo during 6 months. Group B will receive placebo during the first 6 months, and then, Candesartan during the last 6 months. Control visits will be programed monthly and all parameters of interest will be evaluated every 6 months. HYPOTHESIS: Treatment with Candesartan, could improve the HOMA index, the response to the oral glucose tolerance test and reduce the plasma levels of adipoquines, oxidative stress and prothrombotic markers, in non diabetic, non hypertense subjects with dysglycemia and abdominal obesity, recruited from a population at high risk of developing insulin resistance. These effects are independent of the changes in arterial blood pressure. TRIAL REGISTRATION: NCT00319202.

Campaña de educación sanitaria ambiental: manual para uso docente

Manual dirigido al personal docente del partido de Florencio Varela, Buenos Aires, Argentina, con información básica y práctica sobre sanidad ambiental

Simultaneous analysis of wall motion and coronary flow reserve of the left anterior descending coronary artery by transthoracic doppler echocardiography during dipyridamole stress echocardiography.

BACKGROUND: Coronary flow reserve (CFR) can be measured in the left anterior descending artery (LAD) by dipyridamole transthoracic Doppler echocardiography (DTTDE). This information may critically improve the diagnostic accuracy of dipyridamole stress echocardiography, which is limited by moderate sensitivity. OBJECTIVE: We sought to assess the feasibility and accuracy of value of DTTDE. METHODS: We evaluated 752 consecutive patients (478 men; mean age, 64.7 years) referred for dipyridamole stress echocardiography. The diastolic velocity in the LAD was continuously monitored with pulsed Doppler at baseline and during hyperemia induced by the infusion of 0.84 mg/kg of dipyridamole. CFR was calculated as the ratio of maximal and basal diastolic velocity; a value < 2 was considered to indicate decreased CFR. Wall motion was assessed semiquantitatively. Coronary angiography was performed in 132 patients the week after DTTDE. RESULTS: Adequate tracings were obtained in 95% of patients studied (715 of 752). In the subset of 132 patients undergoing coronary angiography, 71 patients (group A) showed a nonsignificant (<70%) and 61 patients (group B) a significant stenosis of the LAD. In group A, 65 had a normal wall-motion response (91.5% specificity) and 19 patients showed a decreased CFR (73.2% specificity; P =.1). In group B, new wall-motion abnormalities were seen in 42 patients (68.8% sensitivity), whereas CFR was decreased in 52 patients (86.8% sensitivity; P <.02). CONCLUSION: Simultaneous assessment of wall motion and CFR of the LAD with DTTDE was highly feasible and safe. The information about CFR had a significantly higher sensitivity than the analysis of wall motion during dipyridamole stress echocardiography.

Determinación de la reserva coronaria mediante el eco-Doppler transesofágico / Assessment of coronary flow reserve by transesophageal Doppler echocardiography

Las mediciones e índices del flujo coronario basal y posvasodilatación obtenidos con eco-Doppler transesofágico en el territorio proximal de la arteria descendente anterior se correlacionaron con los resultados de la cinecoronariografía. Los pacientes sin lesión significativa de la descendente anterior presentaron una velocidad sistólica y diastólica basal más baja con un incremento mayor posadenosina o dipiridamol y en consecuencia una reserva coronaria más elevada que los portadores de obstrucción severa. Se registró una reserva coronaria diastólica mayor o igual 2,3 en 20/20 pacientes con coronaria normal (especificidad 100 por ciento) y menor o igual 1,4 en 9/10 pacientes con lesión severa (sensibilidad 90 por ciento). En conclusión, se demuestra que el método resultó ser de suma utilidad para la evaluación no invasiva de la arteria descendente anterior (AU)

Determinación de la reserva coronaria mediante el eco-Doppler transesofágico / Assessment of coronary flow reserve by transesophageal Doppler echocardiography

Las mediciones e índices del flujo coronario basal y posvasodilatación obtenidos con eco-Doppler transesofágico en el territorio proximal de la arteria descendente anterior se correlacionaron con los resultados de la cinecoronariografía. Los pacientes sin lesión significativa de la descendente anterior presentaron una velocidad sistólica y diastólica basal más baja con un incremento mayor posadenosina o dipiridamol y en consecuencia una reserva coronaria más elevada que los portadores de obstrucción severa. Se registró una reserva coronaria diastólica mayor o igual 2,3 en 20/20 pacientes con coronaria normal (especificidad 100 por ciento) y menor o igual 1,4 en 9/10 pacientes con lesión severa (sensibilidad 90 por ciento). En conclusión, se demuestra que el método resultó ser de suma utilidad para la evaluación no invasiva de la arteria descendente anterior

Cáncer de mama 1982-1993

Objetivo: Evaluar las características personales, parámetros, pronósticos, tratamientos y sobrevida de los pacientes con cáncer de mama en el período de 1982 a 1993 en la C.S.P.C. de Santafé de Bogotá (I.S.S.). Material y Métodos: Se organizan y resumen los datos de características personales y clínicas, tratamiento y sobrevida con base en el TNM incorporando las pacientes a la última clasificación por estados. Se analizaron frecuencias con el programa EPIINFO, la sobrevida se estimó con el método de Kaplan-Meier y la comparación de sobrevida mediante el de Mantzel-Haenszel, ambos métodos con el programa TRUE-EPISTAT eligiendo un valor de p menor de 0.05 como significativo. Resultados: Se encontraron 488 pacientes con promedio de edad 48.16 años, el 46 por ciento menopáusicas, tamaño tumoral mayor de 5 cms. en el 44 por ciento de los casos siendo el carcinoma ductal infiltrante el tipo histológico más frecuente 80.7 por ciento. Estados III A el 24 por ciento, IIIB el 24.1 por ciento y IV el 7.4 por ciento. La mastectomía radical modificada fue el tipo de cirugía más realizado(90 por ciento). Las variables con significancia estadística en la sobrevida y el tiempo libre de enfermedad fueron: estado, niveles y total de ganglios axilares comprometidos, tipo de recaída y tamaño del tumor. Conclusiones: Este estudio permitió establecer que los factores pronósticos con significancia estadística en el análisis de sobrevida y tiempo libre de enfermedad son los mismos encontrados en otros estudios. Estos tienen valor en la decisión terapéutica y en la investigación del carcinoma mamario