ABSTRACT
All stellar-mass black holes have hitherto been identified by X-rays emitted from gas that is accreting onto the black hole from a companion star. These systems are all binaries with a black-hole mass that is less than 30 times that of the Sun1-4. Theory predicts, however, that X-ray-emitting systems form a minority of the total population of star-black-hole binaries5,6. When the black hole is not accreting gas, it can be found through radial-velocity measurements of the motion of the companion star. Here we report radial-velocity measurements taken over two years of the Galactic B-type star, LB-1. We find that the motion of the B star and an accompanying Hα emission line require the presence of a dark companion with a mass of [Formula: see text] solar masses, which can only be a black hole. The long orbital period of 78.9 days shows that this is a wide binary system. Gravitational-wave experiments have detected black holes of similar mass, but the formation of such massive ones in a high-metallicity environment would be extremely challenging within current stellar evolution theories.
ABSTRACT
Se presenta un caso inusual, consistente en el paso del azul de metileno a los vasos uterinos durante la realización de una cromopertubación, tras la extirpación laparoscópica de un endometrioma ovárico. Se hace una revisión bibliográfica de las complicaciones secundarias a la puesta en marcha de esta técnica diagnóstica de la permeabilidad tubárica
We present an unusual case of passage of methylene blue to uterine vessels during chromopertubation after laparoscopic extirpation ovarian endometrioma. We have revised the literature on the sugest secundary complication related to this diagnostic procedure
Subject(s)
Humans , Female , Adult , Methylene Blue/adverse effects , Contrast Media/adverse effects , Endometriosis/surgery , Infertility, Female/diagnosis , Blood VesselsABSTRACT
Se presenta un caso inusual, consistente en el paso del azul de metileno a los vasos uterinos, durante la realización de una cromopertubación, tras la extirpación laparoscópica de un endometrioma ovárico. Se hace una revisión bibliográfica de las complicaciones secundarias a la puesta en marcha de esta técnica diagnóstica de la permeabilidad tubárica
We presenta an inusual case of passage of methylene blue to uterine vessels during chromopertubacion after laparoscopic extirpation ovarian endometrioma. We have revised the literature on the sugest secundary complication related to this diagnostic procedure
Subject(s)
Humans , Female , Adult , Methylene Blue/adverse effects , Endometriosis/surgery , Infertility, Female/diagnosis , Blood Vessels , Contrast Media/adverse effectsABSTRACT
Es raro que el infarto agudo de miocardio se presente en mujeres en edad reproductiva y, por tanto, durante el embarazo. Suele conllevar un gran aumento en la mortalidad materno-fetal, ya que además del riesgo por el infarto en sí, el embarazo dificulta su diagnóstico y tratamiento. Presentamos un caso de una gestante que, desde las 5 semanas de embarazo, presentó varios episodios de infarto
Acute myocardial infarction is rare in women of reproductive age and consequently is uncommon during pregnancy. However, when this event does occur, the risk of maternal-fetal mortality is greatly increased, since, in addition to the risk posed by the myocardial infarction, pregnancy hinders diagnosis and treatment. We report the case of a pregnant women who, from week 5 of pregnancy, showed several episodes of infarction
Subject(s)
Humans , Female , Pregnancy , Adolescent , Myocardial Infarction/complications , Pregnancy Complications, Cardiovascular/therapy , Myocardial Infarction/therapy , Maternal Mortality , Pregnancy, High-RiskABSTRACT
Presentamos el caso clínico de una gestante, diabética pregestacional, que en la semana 22 de gestación presenta una preeclampsia severa con edema masivo agudo de la vulva y un edema agudo de pulmón. Se realiza una revisión bibliográfica, mediante búsqueda informática, en el sistema de Medline, de los trabajos publicados relacionados.El edema vulvar agudo en una gestante puede ser predictor de graves complicaciones, lo que nos obliga a una vigilancia intensa. En nuestra paciente se tuvo que terminar la gestación mediante cesárea en la semana 26, debido a las graves complicaciones maternas
We report the case of a pregnant woman with pregestational diabetes who developed severe preeclampsia in week 22 of pregnancy culminating in acute massive edema of the vulva and acute edema of the lung. A Medline search was performed to identify published studies related to this topic. Acute vulvar edema in pregnancy can be predictive of serious complications and consequently intense monitoring is mandatory. In our patient, Cesarean delivery was performed at week 26, due to serious maternal complications
