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1.
Neotrop Entomol ; 45(4): 369-73, 2016 Aug.
Article in English | MEDLINE | ID: mdl-26921231

ABSTRACT

The present study reevaluates mating in Sphex latreillei (Lepeletier) based on the analysis of 69 filmed reproductive interactions from a population in central Chile. Behaviors recorded before, during, and after copulation were analyzed through Markov chains, identifying statistically significant behavioral transitions that are summarized in a mating ethogram. The results suggest that females exercise choice either during copulation by the means of an internal courtship, or via a post-copulation selection. Both types of inter-sexual selection proposed would explain, in both female and male, the dynamics of a sexual behavior crucial for a reproductive success.


Subject(s)
Sexual Behavior, Animal , Wasps , Animals , Chile , Copulation , Female , Male , Reproduction
2.
Medicina (B.Aires) ; 64(6): 525-528, 2005. ilus
Article in Spanish | LILACS | ID: lil-444259

ABSTRACT

We report an unusual case of a patient with sporadic visceral myopathy and involvement of the entire gastrointestinal and urinary tract. Visceral myopathy is a form of chronic idiophatic intestinal pseudo-obstruction characterized by vacuolar degeneration, atrophy and fibrosis of the intestinal propia muscle layer without inflammatory cells. It can be found in childhood and adolescence affecting the gastrointestinal and urinary visceral muscle. The familial occurrence can be found in about 30% of cases and the mode of transmission is autosomal recessive in most families. It is crucial to exclude secondary forms of chronic intestinal pseudo-obstruction and to obtain full thickness intestinal biopsy for the diagnosis. Surgical treatment is only beneficial in cases with isolated segmental involvement of the gastrointestinal tract.


Se presenta el caso infrecuente de un paciente con miopatía visceral esporádica y afectación de la totalidad del tracto gastrointestinal y de la vía urinaria. La miopatía visceral es una forma de pseudo-obstrucción intestinal crónica idiopática caracterizada por degeneración vacuolar, atrofia y fibrosis de la capa muscular propia de la pared intestinal, sin células inflamatorias. Se puede presentar en niños y adolescentesafectando la musculatura visceral digestiva y urinaria. La manifestación familiar se encuentra en aproximadamente el 30% de los casos y se transmite de forma autosómica recesiva en la mayoría de las familias. Esfundamental descartar causas secundarias de pseudo-obstrucción intestinal crónica y la realización de biopsia de todo el espesor de la pared gastrointestinal para poder arribar al diagnóstico. El tratamiento quirúrgico sólo es eficaz en los que tienen afectación de porciones aisladas del tubo digestivo.


Subject(s)
Female , Humans , Adult , Muscular Diseases/complications , Intestinal Pseudo-Obstruction/etiology , Dilatation, Pathologic/diagnosis , Dilatation, Pathologic/etiology , Muscular Diseases/diagnosis , Urologic Diseases/diagnosis , Urologic Diseases/etiology , Ureteral Diseases/pathology , Intestine, Small/pathology , Intestinal Pseudo-Obstruction/diagnosis
3.
Fetal Diagn Ther ; 19(5): 440-7, 2004.
Article in English | MEDLINE | ID: mdl-15305101

ABSTRACT

OBJECTIVE: To evaluate sonographic appearance, natural history, and neonatal outcome of fetal venous anomalies. METHODS: We performed an observational study, including all fetuses affected by abnormalities of the venous system diagnosed by ultrasound during the prenatal period. RESULTS: 26 fetuses were identified. Other malformations were present in 5 cases (19.2%), 1 fetus had trisomy 21, and 1 fetus had intrauterine growth retardation (IUGR). Twenty-five pregnancies ended in liveborn infants, and there was 1 case of unexplained intrauterine death in the fetus with IUGR affected by varix of the umbilical vein. CONCLUSIONS: Fetal venous anomalies are very rare and may be associated with fetal malformations or IUGR. Conservative management appears to be an adequate medical practice in the absence of other fetal problems, but in the presence of a varix of the umbilical vein, serial follow-up scans are needed to exclude the onset of hydrops or thrombosis of the varix.


Subject(s)
Veins/abnormalities , Abnormalities, Multiple/diagnostic imaging , Female , Fetus/abnormalities , Fetus/blood supply , Humans , Infant, Newborn , Male , Pregnancy , Retrospective Studies , Ultrasonography, Prenatal , Umbilical Veins/abnormalities , Umbilical Veins/diagnostic imaging , Veins/diagnostic imaging
4.
Medicina (B.Aires) ; 64(6): 525-528, 2004. ilus
Article in Spanish | BINACIS | ID: bin-123286

ABSTRACT

We report an unusual case of a patient with sporadic visceral myopathy and involvement of the entire gastrointestinal and urinary tract. Visceral myopathy is a form of chronic idiophatic intestinal pseudo-obstruction characterized by vacuolar degeneration, atrophy and fibrosis of the intestinal propia muscle layer without inflammatory cells. It can be found in childhood and adolescence affecting the gastrointestinal and urinary visceral muscle. The familial occurrence can be found in about 30% of cases and the mode of transmission is autosomal recessive in most families. It is crucial to exclude secondary forms of chronic intestinal pseudo-obstruction and to obtain full thickness intestinal biopsy for the diagnosis. Surgical treatment is only beneficial in cases with isolated segmental involvement of the gastrointestinal tract.(AU)


Se presenta el caso infrecuente de un paciente con miopatía visceral esporádica y afectación de la totalidad del tracto gastrointestinal y de la vía urinaria. La miopatía visceral es una forma de pseudo-obstrucción intestinal crónica idiopática caracterizada por degeneración vacuolar, atrofia y fibrosis de la capa muscular propia de la pared intestinal, sin células inflamatorias. Se puede presentar en niños y adolescentesafectando la musculatura visceral digestiva y urinaria. La manifestación familiar se encuentra en aproximadamente el 30% de los casos y se transmite de forma autosómica recesiva en la mayoría de las familias. Esfundamental descartar causas secundarias de pseudo-obstrucción intestinal crónica y la realización de biopsia de todo el espesor de la pared gastrointestinal para poder arribar al diagnóstico. El tratamiento quirúrgico sólo es eficaz en los que tienen afectación de porciones aisladas del tubo digestivo.(AU)


Subject(s)
Female , Humans , Adult , Intestinal Pseudo-Obstruction/etiology , Muscular Diseases/complications , Dilatation, Pathologic/diagnosis , Dilatation, Pathologic/etiology , Intestinal Pseudo-Obstruction/diagnosis , Intestine, Small/pathology , Muscular Diseases/diagnosis , Ureteral Diseases/pathology , Urologic Diseases/diagnosis , Urologic Diseases/etiology
5.
Ultrasound Obstet Gynecol ; 21(3): 228-33, 2003 Mar.
Article in English | MEDLINE | ID: mdl-12666215

ABSTRACT

AIM: To identify fetal echocardiographic characteristics predictive of perinatal outcome in cases with a prenatal diagnosis of pulmonary stenosis or pulmonary atresia. PATIENTS AND METHODS: We retrospectively reviewed the records and the videotapes of all the cases of pulmonary stenosis and pulmonary atresia diagnosed at our institutions between 1990 and 1999. The following measurements were obtained: diameters of right and left atria and ventricles and ventricular wall thickness; main pulmonary artery and aortic root diameter; direction of flow through the atrioventricular, aortic and pulmonary valves and through the ductus arteriosus. Perinatal outcome and follow-up of the survivors were available in each case. RESULTS: There were 21 cases of pulmonary atresia. Eleven were diagnosed before 24 weeks and nine of them (82%) underwent termination of pregnancy. The survival rate was 50% among the 12 fetuses born at term. None of the fetuses that survived had a large right ventricle, while this was a finding in 50% of those that died. Among the fetuses that died, 83% had a hypertrophic right ventricular wall compared to 33% of the survivors. There were 12 cases of pulmonary stenosis. Three cases were diagnosed before 24 weeks but none underwent termination of pregnancy. All the fetuses with pulmonary stenosis were born at term and four died in the perinatal period. The survival rate was thus 66.6% (8/12). Three (75%) of the fetuses that died had reversed flow in the ductus arteriosus compared with one of the fetuses that survived. CONCLUSION: Our data suggest that a grossly enlarged right ventricle and/or a hypertrophied right ventricular wall in cases of pulmonary atresia and reversed flow in the arterial duct in cases of pulmonary stenosis are likely indicators of a poor prognosis.


Subject(s)
Fetal Diseases/diagnostic imaging , Pulmonary Atresia/diagnostic imaging , Pulmonary Valve Stenosis/diagnostic imaging , Cardiomyopathy, Dilated/diagnostic imaging , Cardiomyopathy, Dilated/pathology , Echocardiography, Doppler, Color/methods , Female , Fetal Diseases/pathology , Gestational Age , Heart Septum/diagnostic imaging , Humans , Pregnancy , Pulmonary Atresia/pathology , Pulmonary Valve Stenosis/pathology , Retrospective Studies , Ultrasonography, Prenatal/methods
7.
Ann Thorac Surg ; 66(3): 938-9, 1998 Sep.
Article in English | MEDLINE | ID: mdl-9768960

ABSTRACT

Embolization of central venous catheter fragments is usually treated with percutaneous interventional techniques, which are difficult to apply in infants with very low birth weight. We surgically removed a catheter fragment in a preterm neonate, to avoid the impending thrombosis of the right pulmonary artery. The operation was performed with a nerve hook introduced through a tiny incision in the vessel's wall. The procedure was well tolerated, and no stricture remains at the site of incision.


Subject(s)
Catheterization, Central Venous/adverse effects , Foreign Bodies/surgery , Infant, Premature, Diseases/therapy , Infant, Premature , Respiratory Distress Syndrome, Newborn/therapy , Ductus Arteriosus, Patent/surgery , Humans , Infant, Newborn , Male
8.
Ultrasound Obstet Gynecol ; 12(2): 132-5, 1998 Aug.
Article in English | MEDLINE | ID: mdl-9744060

ABSTRACT

Arteriovenous fistulas of the placenta rarely occur in singleton pregnancies. This report describes the fetal and neonatal hemodynamic pattern in a singleton gestation in which multiple placental artery-to-vein anastomoses were associated with a large atrial septal defect and a single umbilical artery with an anomalous connection of the persistent right and left umbilical veins. Possible links between the extracardiac vascular malformation and the congenital heart defect are discussed.


Subject(s)
Arteriovenous Fistula/diagnostic imaging , Heart Septal Defects, Atrial/diagnostic imaging , Placenta/blood supply , Ultrasonography, Prenatal , Umbilical Veins/abnormalities , Adult , Arteriovenous Fistula/complications , Female , Fetal Diseases/diagnostic imaging , Heart Septal Defects, Atrial/complications , Humans , Infant, Newborn , Pregnancy
9.
Ann Thorac Surg ; 64(4): 1167-9, 1997 Oct.
Article in English | MEDLINE | ID: mdl-9354550

ABSTRACT

Successful one-stage repair of a Berry syndrome (interrupted aortic arch, distal aortopulmonary septal defect, right pulmonary artery branch originating from the ascending aorta, and intact ventricular septum) in the neonatal period has been reported in only 2 cases. We report the case of a newborn operated on with deep hypothermic arrest and isolated myocardial perfusion in whom the interrupted aortic arch was corrected by direct anastomosis between the ascending and descending aorta and the aortopulmonary septal defect was treated with reconstruction of the pulmonary trunk and right pulmonary artery, using a flap of aortic tissue. A native pericardial patch was used to reconstruct the ascending aorta.


Subject(s)
Abnormalities, Multiple/surgery , Aorta/abnormalities , Heart Septal Defects/surgery , Pulmonary Artery/abnormalities , Aorta/surgery , Heart Defects, Congenital/surgery , Humans , Infant, Newborn , Male , Pulmonary Artery/surgery , Syndrome
10.
Prenat Diagn ; 17(10): 901-6, 1997 Oct.
Article in English | MEDLINE | ID: mdl-9358568

ABSTRACT

The aim of the present study was to assess the accuracy of the four-chamber view as a screening test for detection of congenital heart disease (CHD) prenatally in a low-risk population. A prospective observational study was conducted in 17 ultrasound units of the Piemonte Region, Italy, in pregnancies with no risk factors for CHD. At each routine scan, from 18 weeks of gestational age, the four-chamber view of the heart was looked for. When an anomaly was suspected, the patients were referred to a specialized unit. Follow-up of the babies until discharge from the hospital was obtained. 11,232 sonograms were performed on 8299 pregnancies. Cardiac malformations were diagnosed in 40 newborns (4.8/1000). Six of them (15 per cent) had been recognized in utero. The sensitivity, specificity, and positive and negative predictive values were 15, 99.9, 50, and 99.6 per cent, respectively. When malformations that are not associated with an abnormal four-chamber view were excluded from the analysis, the sensitivity increased to 35.3 per cent. The sensitivity found in this study is low, but it is probably realistic since it is comparable to that reported in other multicentric studies. This type of study should reflect the state of the art of the method applied in the field. Although the sensitivity is low, it would be nil if the test were not performed. Moreover, it will probably increase with better training of the operators and by extending the examination to the ventriculo-arterial connections.


Subject(s)
Fetal Diseases/diagnostic imaging , Heart Defects, Congenital/diagnosis , Ultrasonography, Prenatal , Female , Gestational Age , Heart Defects, Congenital/diagnostic imaging , Humans , Italy , Mass Screening/methods , Pregnancy , Pregnancy Outcome , Prospective Studies , Sensitivity and Specificity
11.
Ultrasound Obstet Gynecol ; 8(4): 241-6, 1996 Oct.
Article in English | MEDLINE | ID: mdl-8916376

ABSTRACT

This retrospective multicenter study represents an analysis of the intrauterine determinants of the prognosis for conotruncal anomalies. Data regarding reason for referral, presence of chromosomal or extracardiac anomalies, pregnancy and surgical outcome were recorded in 67 cases of conotruncal anomalies from three Italian referral units. Chromosomal aberrations effected 11 of the 60 (18.3%) fetuses in which a karyotype was available. Extra-cardiac malformations were present in 25/67 cases (37.3%). No chromosomal anomalies were present in fetuses with complete or corrected transposition of the great arteries. However, tetralogy of Fallot and double-outlet right ventricle were associated with chromosomal anomalies in 22% and 38% of cases, respectively, and with extracardiac anomalies in 45% and 46% of cases, respectively. Only 20 of the 67 (31%) cardiac malformations were associated with an abnormal four-chamber view. There were 28 (41.7%) terminations of pregnancy, six (8.9%) intrauterine deaths and 16 (23.8%) neonatal deaths. Seventeen neonates (25.3%) are currently alive, and 15 of these have undergone reparative surgery. The prognosis of conotruncal anomalies is poorer when the conditions is diagnosed in utero. This is mainly due to the frequent association with chromosomal and/or extracardiac anomalies, often leading to intrauterine or early neonatal death.


Subject(s)
Chromosome Aberrations/diagnosis , Echocardiography/methods , Heart Defects, Congenital/diagnostic imaging , Ultrasonography, Prenatal/methods , Chromosome Aberrations/genetics , Chromosome Aberrations/mortality , Chromosome Disorders , Female , Gestational Age , Heart Defects, Congenital/genetics , Heart Defects, Congenital/mortality , Humans , Italy , Karyotyping , Pregnancy , Pregnancy Outcome , Prognosis , Retrospective Studies , Sensitivity and Specificity , Survival Rate
13.
G Ital Cardiol ; 23(5): 473-7, 1993 May.
Article in Italian | MEDLINE | ID: mdl-8339873

ABSTRACT

The case of a young adolescent who suffered a sudden death while playing soccer is described. At necropsy a long intramyocardial segment of the obtuse marginal branch of the left coronary artery was found, with fresh ischemic damage in the surrounding myocardium. We comment about negativity of the tests the boy had undertaken because of a single syncopal episode he suffered in similar circumstances. Those tests included two 24-hour Holter monitorings, a maximal electrocardiographic stress-test and an electrophysiologic study. In no occasion did he complain of angina pectoris.


Subject(s)
Coronary Vessel Anomalies/pathology , Death, Sudden, Cardiac/etiology , Soccer , Adolescent , Coronary Vessel Anomalies/diagnosis , Coronary Vessels/pathology , Death, Sudden, Cardiac/pathology , Electrocardiography, Ambulatory , Exercise Test , Humans , Male
16.
G Ital Cardiol ; 11(1): 12-22, 1981.
Article in Italian | MEDLINE | ID: mdl-7239094

ABSTRACT

87 24-hour electrocardiographic monitoring sessions were conducted in 71 ambulatory patients (pts) in the early post-hospital phase after acute myocardial infarction. 29 (41%) had anterior, 42 (59%) inferoposterior myocardial infarction, 44 (62%) had angina or asymptomatic ischemia, 7 (10%) were in cardiac failure (II-III class NYHA). The occurrence of ventricular ectopic activity (VEA) during sleep hours was compared to the awake state; VEA during sexual and other activities of the awake state was studied. Excluding pts free of VEA during 24-hour monitoring the number of ventricular mature beats was lowered in 71% of sessions and augmented in 12% during sleep hours (p less than 0.001). Maximal grade of VEA was observed during wakefulness in 62% of session and in 9% during sleep (p less than 0.001); in 9% there was no difference, in 20% no VEA occurred. Total VEA, bi-tri-quadrigeminism and repetitive extrasystoles were significantly reduced during sleep: p less than 0.001, p less than 0.05 and p less than 0.01 respectively. This pattern was independent from site of infarction, presence of ischemia, cardiac failure (II-III class NYHA). A discrete correlation was observed between total VEA and heart rate; a poor correlation was seen between total VEA, multiform and repetitive extrasystoles. During wakefulness VEA was mainly related to physical exertion and emotional stress. Sleep and relax periods of the day showed VEA similar to sleeping hours of the night. Sexual activity did not significantly elicit more VEA than other activities of the awake state. Repetitive forms, observed in 8% of the population, were probably related to the rapid increase of sympathetic tone. The absence of repetitive VEA, potentially dangerous, during sleep hours (except the first) not due to antiarrhythmic drugs suggests to increase the dosage of these medications during the awake state in the majority of these pts.


Subject(s)
Arrhythmias, Cardiac/etiology , Myocardial Infarction/complications , Adult , Arrhythmias, Cardiac/physiopathology , Heart Failure/etiology , Heart Rate , Humans , Male , Middle Aged , Myocardial Infarction/physiopathology , Rest , Sexual Behavior , Sleep , Wakefulness
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