La Prensa medica mexicana最新文献

[Women and medicine]. [妇女和医药]。

La Prensa medica mexicana Pub Date : 1993-10-13 DOI: 10.1300/J103v12n02_01

Susan H. Anthes, L. Crowe

引用次数: 0

[Malignant melanoma of the anus. Report of a case and review of the literature]. 肛门的恶性黑色素瘤。病例报告及文献回顾]。

La Prensa medica mexicana Pub Date : 1979-11-01

A León Moreno, A Vargas Solano, R Cárdenas Almagro

引用次数: 0

[Vectorcardiographic manifestations of right ventricular enlargement]. [右心室增大的矢量图表现]。

La Prensa medica mexicana Pub Date : 1979-11-01

A de Micheli, G A Medrano

{"title":"[Vectorcardiographic manifestations of right ventricular enlargement].","authors":"A de Micheli, G A Medrano","doi":"","DOIUrl":"","url":null,"abstract":"The basic criteria for the vectorcardiographic diagnosis of right ventricular enlargement are discussed, in context with the course of myocardial activation. Right ventricular dilatation, secondary to isolated diastolic overloading (atrial septal defect) shows basically different degrees of dextrorotation. The ventricular curve starts to the left on the frontal and horizontal planes, and forward on the last one. Cases with right ventricular hypertrophy, produced by sustained systolic overload, are also evaluated. When the hypertrophy is generalized (pulmonary valvular stenosis), there is an increase in the manifestation of all the resulting vectors of activation of this ventricle: IIs, IIr, and IIIr. As a resultant of these changes, the ventricular curve presents a clockwise rotation in the three planes, and is oriented to the right and forward, with its terminal portions generally located above the E point. When the right ventricular hypertrophy is of the segmentary type, there is an increase of the manifestation of only some of the resulting vectors of the activation of this ventricle. For example, the vector IIr will be increased in cases of tetralogy of Fallot, while the IIIr will be increased in some cases of obstructive chronic pulmonary hypertensive cardiopathy. The T loop, of secondary type, generally opposes the vector IIr on the horizontal plane, and the IIIr on the frontal plane. When an important right ventricular dilatation is associated to a right bundle branch block of intermediate degree, owing to their proximity, the manifestation of the electromotive parietal forces is increased at the expense of the septal ones. This phenomenon produces a characteristic appearance of the SH loop, narrow and with a clockwise rotation.","PeriodicalId":18016,"journal":{"name":"La Prensa medica mexicana","volume":"44 11-12","pages":"242-50"},"PeriodicalIF":0.0,"publicationDate":"1979-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11381278","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

[Vectorcardiographic manifestations of left intraventricular conduction disorders]. [左室内传导障碍的矢量图表现]。

La Prensa medica mexicana Pub Date : 1979-11-01

A de Micheli, G A Medrano

{"title":"[Vectorcardiographic manifestations of left intraventricular conduction disorders].","authors":"A de Micheli, G A Medrano","doi":"","DOIUrl":"","url":null,"abstract":"Both, the vectorcardiographic changes produced by the various degrees of left bundle branch block and these observed with the different types of left distal block, are described. When a \"wave jumping\" phenomenon exists, the vectorcardiographic changes are more characteristic in the horizontal plane than in the frontal plane and can be interpreted satisfactorily in basis of the ventricular activation sequence. The normal counterclockwise rotation of the horizontal vectorcardiogram persists in the presence of left bundle branch block of slight and moderate degrees, since the electromotive forces of the free left ventricular wall are still predominant. In the majority of intermediate degree blocks, the middle portion of the RH loop develops with a clockwise rotation and general aspect with a clockwise rotation and the general aspect of the ventricular loop resembles an eight figure. This is due to the electromotive forces originated by the delayed depolarization of the left septal mass that starts to predominate. With advanced degrees of block, the largest portion of the RH loop shows a clockwise rotation, as well as marked notchings and slurrings. The initial anterior portion of the horizontal vectorcardiogram does not disappear, but is situated to the left of the anterior-posterior axis with a counterclockwise rotation (first right septal vector). Otherwise, the direct electrical sign of left distal block emphasized: evidence of delayed activation in a limited zone of the homolateral ventricle. This local delay gives rise to an asynchronism of the activation phenomenon between the upper and lower regions of the ventricle. The diagnosis of left bifascicular block is based essentially on the evidence of unequal delay of the activation sequence in the basal regions and in the inferior ones of the homolateral ventricle and also on the frequent persistence of the first left septal vector.","PeriodicalId":18016,"journal":{"name":"La Prensa medica mexicana","volume":"44 11-12","pages":"260-9"},"PeriodicalIF":0.0,"publicationDate":"1979-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11476707","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

[Trichinosis in Zacatecas. Epidemiological and clinical study]. 萨卡特卡斯的旋毛虫病。流行病学和临床研究]。

La Prensa medica mexicana Pub Date : 1979-11-01

R Martínez Marañon

引用次数: 0

[The Inquisition and physicians in New Spain]. [新西班牙的宗教裁判所和医生]。

La Prensa medica mexicana Pub Date : 1979-11-01

A de Micheli

引用次数: 0

[Postero'inferior aneurysm of the left ventricle following myocardial infarction. Diagnosis and surgical treatment]. 心肌梗死后左心室后下动脉瘤。诊断和手术治疗]。

La Prensa medica mexicana Pub Date : 1979-11-01

S E Flores Covarrubias, C Acoltzin Vidal, G Nava Lopez, X Palacios Macedo

引用次数: 0

[Efficacy of and tolerance to mefenamic acid in dysfunctional hypermenorrhea]. [甲芬那酸治疗功能不全痛经的疗效及耐受性]。

La Prensa medica mexicana Pub Date : 1979-11-01

F O Martińez Alcalá, N Casanova Alvarez, R Manzanilla Sevilla, R Gonzaĺez Iñiguez, P Martińez Reyes

引用次数: 0

[Vectorcardiographic manifestations of supraventricular ectopic rhythms]. [室上异位节律的矢量图表现]。

La Prensa medica mexicana Pub Date : 1979-11-01

G A Medrano, A de Micheli

引用次数: 0

[Vectorcardiographic manifestations of left ventricular and biventricular enlargement]. [左室和双室增大的矢量图表现]。

La Prensa medica mexicana Pub Date : 1979-11-01

A de Micheli, G A Medrano

{"title":"[Vectorcardiographic manifestations of left ventricular and biventricular enlargement].","authors":"A de Micheli, G A Medrano","doi":"","DOIUrl":"","url":null,"abstract":"The basic criteria for the vectorcardiographic diagnosis of left ventricular and biventricular enlargements are discussed on the basis of the myocardial activation sequence. Left ventricular dilatation, secondary to isolated diastolic overloading, increases the manifestation of all the vectors resulting of the activation of this ventricle. These changes reflect the proximity of the left ventricular walls to the exploring electrodes. The vectors above mentioned project themselves as wide ventricular curves with counterclockwise rotation on the three planes. The T loop, of secondary type, is concordant in its orientation with the R loop. Cases with left ventricular hypertrophy, produced by a sustained systolic overloading, are also described. In the presence of global left ventricular hypertrophy without LBBB, the manifestation of all the vectors resulting from the depolarization of this ventricle (I, IIl, IIIl), is increased. This is due to a prolonged duration of the corresponding activation fronts. These vectors are projected on the different segments of the ventricular curves and they show a counterclockwise rotation on the three planes. When LBBB is also present, the first septal vector is not evident. The T loop, of secondary type, opposes the R loop on the frontal and horizontal planes. The presence of left ventricular hypertrophy of the segmentary type, generally increases the manifestation of the vector I, and sometimes, also that of the vector IIIl. When both ventricles are hypertrophied, the electromotive forces of the chamber more severely affected predominate in the vectorcardiographic records.","PeriodicalId":18016,"journal":{"name":"La Prensa medica mexicana","volume":"44 11-12","pages":"251-9"},"PeriodicalIF":0.0,"publicationDate":"1979-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11380104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0