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1.
Mymensingh Med J ; 31(1): 165-171, 2022 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-34999698

RESUMO

Osteoarthritis (OA) is a chronic, progressive disease involving the degeneration of cartilage and joint tissue, resulting in pain and disability. Bilateral total knee arthroplasty (TKA) is is an effective intervention that improves quality of life, reduces pain and increases functional capability. This study was performed to compare the functional outcomes between staged and simultaneous total knee arthroplasty. This prospective interventional study was carried out in Arthroscopic and Arthroplasty unit of BSMMU, Dhaka from January 2017 to December 2018. A total of 60 OA patients underwent TKA were included in this study. Thirty patients underwent simultaneous TKA procedure and 30 patients underwent staged TKA procedures performed with 1-6 months between stages were included. Pre-operative and post operative data were collected. Data were analyzed using SPSS 12.0. Numerical data were analyzed using unpaired t test and categorical data were analyzed using Chi-Square test. A value of p<0.05 was considered statistically significant. Mean age of the study subjects was 60.47±10.13 years in staged group and 59.30±9.90 years in simultaneous group. Male to female ratio was 1:1.5 in staged group and 1:2 in simultaneous group. Mean BMI of the study subjects was 30.70±4.91kg/m² in staged group and 30.06±4.79kg/m² in simultaneous group (p>0.05). In both groups, maximum study subjects were housewife (33.3% vs. 33.3%). In staged group 13.3% and 16.7% in simultaneous group were heavy worker; 20.0% in staged group and 16.7% in simultaneous group were medium worker (p>0.05). Pain, motion, stability and function were significantly changed after surgery comparing before surgery.Infection was observed in 10.0% cases in both groups. Stiffness was observed in 10.0% cases in staged group but in 6.7% cases in simultaneous group. Even final outcome showed better in simultaneous procedure, there was no significant difference between two procedures. The outcome of both simultaneous andstaged procedure of bilateral total knee replacement in Advanced Osteoarthritis is similar.


Assuntos
Artroplastia do Joelho , Osteoartrite do Joelho , Idoso , Bangladesh , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Osteoartrite do Joelho/cirurgia , Estudos Prospectivos , Qualidade de Vida , Estudos Retrospectivos , Resultado do Tratamento
2.
Mymensingh Med J ; 27(1): 108-115, 2018 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-29459600

RESUMO

Graft selection for primary anterior cruciate ligament reconstruction is very important part of knee stability. The purpose of this Qasi experimental study was to compare the clinical outcomes after ACL reconstruction using either a BPTB graft or a four-strand hamstrings graft and conducted from January 2012 to December 2013. Patients presented with a symptomatic unilateral ACL rupture who were underwent ACL reconstruction by using either BPTB or Hamstrings graft, IPD of Department of Orthopedics at Bangabandhu Sheikh Mujib Medical University (BSMMU), Dhaka as well as in a private hospital in Dhaka, Bangladesh were selected as study population. Patients were divided into Group A who were treated with the patellar tendon bone graft and Group B patients who were received hamstrings tendon graft. All surgery was performed by the same surgeon and the both procedures were arthroscopically assisted. Operation was performed at least three (03) weeks after initial trauma. All patients were assessed by independent examiner before surgery, at 6 months, 12 months and then annually by clinically. A total number of 70 patients were recruited for this study. The mean age with SD of Group A and Group B were 27.31±10.91 and 26.97±10.10 years respectively (p=0.892). Tegner scores were measured preoperatively and post-operatively. The score were 2.2±1.1 and 2.1±1.0 in preoperatively (p=0.817). In post-operatively the mean score were 6.0±1.7 and 5.8±1.5 in Group A and Group B respectively (p=0.508). Regarding outcome of the operation excellent was 18(51%) cases in both Group A and Group B, good was 15 (43%) and 16(46%) cases in Group A and Group B respectively (p=0.793). In conclusion there was no significant difference between the two groups of the ACL reconstructions cases.


Assuntos
Lesões do Ligamento Cruzado Anterior , Reconstrução do Ligamento Cruzado Anterior , Ligamento Patelar , Adolescente , Adulto , Ligamento Cruzado Anterior , Reconstrução do Ligamento Cruzado Anterior/métodos , Artroscopia , Bangladesh , Humanos , Ligamento Patelar/transplante , Adulto Jovem
3.
Bull Environ Contam Toxicol ; 87(1): 45-9, 2011 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-21556781

RESUMO

Root and shoot samples of Prosopis juliflora were assessed for their heavy metal content to evaluate the species as a green solution to decontaminate soils contaminated with lead and cadmium. The highest uptake of both the metals was observed in plants from industrial sites. Sites with more anthropogenic disturbance exhibited reduced chlorophyll levels, stunted growth, delayed and shortened reproductive phase. The ratios of lead and cadmium in leaves to lead and cadmium in soil were in the range of 0.62-1.46 and 0.55-1.71, respectively. Strong correlation between the degree of contamination and concentrations of lead and cadmium in plant samples identifies P. juliflora as an effective heavy metal remediator coupled with environmental stress.


Assuntos
Cádmio/análise , Chumbo/análise , Folhas de Planta/metabolismo , Raízes de Plantas/metabolismo , Prosopis/metabolismo , Poluentes do Solo/análise , Biodegradação Ambiental , Cádmio/metabolismo , Chumbo/metabolismo , Folhas de Planta/química , Raízes de Plantas/química , Prosopis/química , Poluentes do Solo/metabolismo
4.
Hum Reprod ; 25(1): 133-41, 2010 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-19850590

RESUMO

BACKGROUND: While research on the psychological experiences of infertility has focused almost exclusively on the negative aspects, clinical experience with individuals and couples facing infertility has demonstrated that personal gain can also arise from the struggle involved. This study examined whether individuals who struggle with infertility report posttraumatic growth (PTG), and if perceived availability of and satisfaction with social support are associated with such growth. Other correlates of PTG are reported as well. METHODS: Using a cross-sectional design, a convenience sample of 121 individuals with infertility completed a background questionnaire, the Posttraumatic Growth Inventory and the Social Support Questionnaire. RESULTS: While individuals reported moderate PTG, moderate availability of, and high satisfaction with social support, there was no significant association between the variables. Infertility-related variables emerged as central to explaining PTG with those with non-female related diagnoses and unexplained diagnoses demonstrating lower PTG than others (t = 2.96, t = 3.6, respectively, P < or = 0.05). Additionally, live birth deliveries was positively associated with PTG (r(2) = 0.22, P < or = 0.02), and those who engaged in clergy counseling had higher PTG than those who did not (t = 2.34, P < or = 0.02). Determinants were unexplained infertility (lower PTG) and number of live birth deliveries (higher PTG). CONCLUSIONS: In spite of limitations related to the convenience sampling, correlational design and subjective self-report nature of the data, findings suggest that individuals who suffer from infertility can experience personal growth. Further research will help identify correlates and provide guidance for mental health practitioners on counseling infertility patients to promote growth.


Assuntos
Infertilidade/psicologia , Apoio Social , Adulto , Características da Família , Feminino , Humanos , Relações Interpessoais , Masculino , Satisfação Pessoal , Técnicas de Reprodução Assistida
5.
Am J Obstet Gynecol ; 179(3 Pt 1): 610-9, 1998 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-9757960

RESUMO

OBJECTIVE: Our objective was to study the effect of estrogen administration and moderate hypertension on left ventricular size, pump function, and contractility in chronically instrumented ewes. STUDY DESIGN: Ewes were either given 0.06 mg/kg 17beta-estradiol intramuscularly (n = 8) or were made hypertensive (n = 6) by inflation of an occluder around the aorta and were studied weekly. After 3 weeks each ewe received the opposite treatment. RESULTS: Estrogen administration caused an increase in left ventricular chamber size at a given pressure, fractional shortening (21.9% +/- 2.9% to 28.5% +/- 3.7%), and stroke volume (1.4 +/- 0.3 mL/kg to 1.6 +/- 0.3 mL/kg). Subsequent hypertension further increased left ventricular size at a given pressure but decreased fractional shortening (20.0% +/- 4.4%) and stroke volume (1.3 +/- 0.3 mL/kg). With hypertension first, there was no left ventricular enlargement, even with subsequent estrogen administration, and there were no changes in left ventricular pump function. End-systolic pressure and stress-dimension relationships did not change with either treatment. The end-systolic wall stress-fractional shortening relationship was likewise unchanged, suggesting that neither treatment changed contractility. CONCLUSIONS: The left ventricle previously exposed to hypertension does not remodel when exposed to estrogen, and cardiac pump function decreases when the estrogen enlarged heart is faced with moderate, subacute hypertension.


Assuntos
Estradiol/administração & dosagem , Coração/efeitos dos fármacos , Coração/fisiopatologia , Hipertensão/fisiopatologia , Animais , Esquema de Medicação , Estradiol/uso terapêutico , Feminino , Ventrículos do Coração , Hemodinâmica/efeitos dos fármacos , Hemodinâmica/fisiologia , Hipertensão/patologia , Injeções Intramusculares , Miocárdio/patologia , Ovinos
6.
EMBO J ; 17(4): 1120-7, 1998 Feb 16.
Artigo em Inglês | MEDLINE | ID: mdl-9463389

RESUMO

The general view that mRNA does not contain inosine has been challenged by the discovery of adenosine deaminases that act on RNA (ADARs). Although inosine monophosphate (IMP) cannot be detected in crude preparations of nucleotides derived from poly(A)+ RNA, here we show it is readily detectable and quantifiable once it is purified away from the Watson-Crick nucleotides. We report that IMP is present in mRNA at tissue-specific levels that correlate with the levels of ADAR mRNA expression. The amount of IMP present in poly(A)+ RNA isolated from various mammalian tissues suggests adenosine deamination may play an important role in regulating gene expression, particularly in brain, where we estimate one IMP is present for every 17 000 ribonucleotides.


Assuntos
Encéfalo/metabolismo , Inosina/metabolismo , RNA Mensageiro/metabolismo , Adenosina Desaminase/metabolismo , Animais , Encéfalo/enzimologia , Inosina/isolamento & purificação , Especificidade de Órgãos/genética , Poli A/análise , RNA/análise , RNA Mensageiro/análise , RNA de Transferência/análise , Proteínas de Ligação a RNA , Ratos
8.
Am J Physiol ; 264(4 Pt 1): E490-6, 1993 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-8476027

RESUMO

We studied the chronic effect of administration of a single large intramuscular dose of 17 beta-estradiol on left ventricular chamber size and output in the ewe. Fourteen oophorectomized ewes were successfully instrumented and studied, with measurements made of left ventricular, aortic, right and left atrial pressures, left ventricular stroke volume, and left ventricular minor axis dimension. Unanesthetized ewes were studied before and 1, 2, and 3 wk after intramuscular administration of 0.6 mg/kg 17 beta-estradiol (7 ewes) or 1.5 ml sesame oil placebo (7 ewes). Left ventricular end-diastolic pressure-end-diastolic dimension (LVEDP-EDD) and left ventricular end-diastolic pressure-stroke volume (LVEDP-SV) relationships were quantified during graded inferior vena caval occlusion and volume infusion. Left ventricular end-diastolic diameter was larger after estrogen but not after placebo administration. The LVEDP-EDD relationship shifted progressively rightward, indicating left ventricular chamber enlargement in the estrogen group but was unchanged in the placebo group. The plateau limb of the LVEDP-SV relationship in the estrogen group shifted up from a mean stroke volume of 77.1-89.5 ml/beat and did not change in the placebo group. We conclude that administration of a single large intramuscular dose of 17 beta-estradiol resulted in left ventricular chamber enlargement and increased stroke volume in the ewe.


Assuntos
Estradiol/farmacologia , Hemodinâmica/efeitos dos fármacos , Hipertrofia Ventricular Esquerda/induzido quimicamente , Animais , Função do Átrio Esquerdo/efeitos dos fármacos , Função do Átrio Direito/efeitos dos fármacos , Pressão Sanguínea/efeitos dos fármacos , Volume Sanguíneo/efeitos dos fármacos , Débito Cardíaco/efeitos dos fármacos , Feminino , Frequência Cardíaca/efeitos dos fármacos , Hematócrito , Hipertrofia Ventricular Esquerda/fisiopatologia , Ovariectomia , Valores de Referência , Ovinos , Volume Sistólico/efeitos dos fármacos , Função Ventricular Esquerda/efeitos dos fármacos , Função Ventricular Direita/efeitos dos fármacos
9.
Obstet Gynecol ; 78(2): 265-9, 1991 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-2067773

RESUMO

Previous studies using two-dimensional chest radiographs have found a significant correlation between prematurity, fetal growth retardation, and the size of the maternal heart. Accordingly, we evaluated maternal left ventricular size and function by M-mode echocardiography near the end of gestation in 42 women with suspected fetal growth retardation and in 79 women whose pregnancies were normal. No significant differences were found between the two groups, implying that maternal left ventricular size and function is adequate in pregnancies complicated by "idiopathic" fetal growth retardation.


Assuntos
Retardo do Crescimento Fetal , Ventrículos do Coração/diagnóstico por imagem , Função Ventricular Esquerda , Ecocardiografia , Feminino , Ventrículos do Coração/anatomia & histologia , Humanos , Gravidez
10.
J Immunol ; 144(5): 1988-96, 1990 Mar 01.
Artigo em Inglês | MEDLINE | ID: mdl-2307848

RESUMO

The murine CR genes Crry (previously termed mCRY) and Crry-ps (previously termed mCRX) are two distinct, but related, sequences which are the evolutionary homologs to sequences contained within the human CR1 gene. Screening a BALB/c genomic DNA library with the Crry/Crry-ps specific cDNA resulted in the isolation of two clusters of genomic sequences: those specific for Crry and those specific for Crry-ps. The coding sequences of the Crry gene encompass over 25 kb of DNA, whereas the Crry-ps sequences are included within a single 5.6-kb Eco-R1 fragment. The Crry gene consists of 10 separate exons. The first of these contains both the signal sequence and an alternatively spliced 129 bp present in approximately 10% of the Crry transcripts. Of the remaining exons, two encode a single sixty amino acid repeat domain each (A and E), two encode a split sixty amino acid repeat (B), and another encodes two 60 amino acid domains (C and D) fused as one exon. The transmembrane and cytoplasmic regions are both split into two exons each. RNA protection analysis indicates that although there is alternative splicing in the 5' region of the gene, the 3' exons encoding the terminal 60 amino acid repeat, the transmembrane region and cytoplasmic exons are used in the same order in all Crry transcripts. This suggests that the Crry gene product is not found as a secreted protein, but only as a cell surface bound protein. DNA sequence analysis of the Crry-ps gene indicates that this sequence most likely represents a pseudogene resulting from a processed mRNA transcript from the Crry gene. This conclusion is based on the lack of intervening sequences in the Crry-ps gene and the observation that the Crry-ps gene sequence contains both an 11-bp deletion within the "coding" region and a degenerate poly A tail at the 3' end of the homologous sequence. Additionally, RNA protection analysis indicates that mRNA cannot be detected which matches the Crry-ps sequence.


Assuntos
Receptores de Complemento/genética , Sequência de Aminoácidos , Animais , Sequência de Bases , Southern Blotting , Clonagem Molecular , DNA/genética , Genes , Proteínas de Membrana/genética , Camundongos , Camundongos Endogâmicos BALB C , Dados de Sequência Molecular , Família Multigênica , Pseudogenes , RNA Mensageiro/genética , Mapeamento por Restrição , Ribonucleases/farmacologia , Transcrição Genética
11.
Am J Physiol ; 257(5 Pt 2): R1205-11, 1989 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-2480067

RESUMO

We investigated the relationship between mean circulatory filling pressure (MCFP) and blood volume in nonpregnant (NP), estrogen-treated (E), and pregnant (P) guinea pigs. Reversible circulatory arrest was produced by rapid ventricular pacing or acetylcholine in unanesthetized animals remote from surgery. MCFP (mmHg) was higher for E (7.1 +/- 0.3) than for NP (5.8 +/- 0.5) or P (5.3 +/- 0.4). The gradient for venous return, the difference between MCFP and right atrial pressure (mmHg), did not differ in NP- (6.0 +/- 0.5), P- (5.8 +/- 0.5), or E- (5.8 +/- 0.4) treated animals. Capacitance, the blood volume (ml/kg) at an MCFP of 6 mmHg, was increased in P (84 +/- 6) and E (89 +/- 7), compared with NP (64 +/- 5) animals. Compliance, the ratio of the change in volume to change in pressure in the range of 6-12 mmHg (ml.kg-1.mmHg-1), was greater in P (4.4 +/- 0.3) than NP (3.5 +/- 0.3) animals. Hexamethonium blockade did not affect MCFP, capacitance, or compliance. We conclude that the effect of blood volume expansion on the circulation in pregnancy cannot be predicted from knowledge of MCFP-blood volume relationships in the nonpregnant animal, because capacitance and compliance are altered. Estrogen administration to nonpregnant animals reproduces some of these effects.


Assuntos
Pressão Sanguínea , Volume Sanguíneo , Estradiol/farmacologia , Prenhez/fisiologia , Animais , Circulação Sanguínea , Dextranos , Feminino , Bloqueadores Ganglionares/farmacologia , Cobaias , Átrios do Coração , Hemodinâmica/efeitos dos fármacos , Hexametônio , Compostos de Hexametônio/farmacologia , Gravidez
12.
J Immunol ; 143(6): 2058-67, 1989 Sep 15.
Artigo em Inglês | MEDLINE | ID: mdl-2528587

RESUMO

CR2, a 145,000 to 150,000 Mr protein which binds specific breakdown products of C3, has been identified on the surface of both human and murine B cells. In order to understand the evolutionary relatedness of the human and murine proteins, we have used the coding sequences from the human CR2 gene to investigate those homologous sequences of murine Cr2. Human CR2 cDNA sequences were used as probes on a cDNA library derived from BALB/c spleen mRNA to identify cross-reacting cDNA sequences. A number of putative cDNA clones encoding murine Cr2 have been isolated and examined. DNA sequence analysis of these Cr2 cDNA clones indicates that they represent the murine homolog to human CR2. mRNA analysis with these Cr2 cDNA clones has revealed a transcription pattern similar to, but distinct from that seen for CR2. Whereas human CR2 coding sequences identify a single mRNA species of approximately 5 kb from human tonsillar mRNA, the murine counterpart identifies four transcripts from murine spleen of approximately 3, 5, 9 and 11 kb in size. The Cr2 cDNA clones which detect the four forms of spleen mRNA overlap in coding sequences and contain exons mapping to three colinear fragments as defined by EcoRI digestion. This suggests that the 3- 5-, 9-, and 11-kb mRNA forms arise by alternative splicing from a single gene. Use of these murine Cr2-specific cDNA clones to isolate their respective genomic sequences has allowed for the linkage of the 3' end of the Cr2 gene to the 5' end of the Crry gene, the evolutionary homolog to human CR1.


Assuntos
Antígenos de Diferenciação de Linfócitos B/genética , Sequência de Bases , Genes , Ligação Genética , Família Multigênica , Receptores de Complemento/genética , Homologia de Sequência do Ácido Nucleico , Sequência de Aminoácidos , Animais , Antígenos de Diferenciação de Linfócitos B/isolamento & purificação , Clonagem Molecular , DNA/isolamento & purificação , Sondas de DNA , Humanos , Camundongos , Camundongos Endogâmicos BALB C , Dados de Sequência Molecular , Receptores de Complemento/isolamento & purificação , Receptores de Complemento 3d
13.
J Immunol ; 142(2): 582-9, 1989 Jan 15.
Artigo em Inglês | MEDLINE | ID: mdl-2911011

RESUMO

The mouse genome contains two sets of gene sequences which are highly homologous to the gene encoding the human C3b/C4b receptor (CR1). These genes, termed murine CRY (mCRY) and murine CRX (mCRX) reside on murine chromosomes 1 and 8, respectively. Analysis of cDNA isolated by using these sequences as probes indicates that there are two related but distinct mRNA which are expressed in a wide variety of murine tissues including spleen, liver, lung, and brain. Both of these transcripts encode proteins which should contain a signal sequence for membrane insertion, a transmembrane/cytoplasmic tail region for membrane anchoring, and five extracellular domains made up of 60 amino acid consensus repeat sequences. The difference between the two is the presence of an additional exon of 129 bp immediately 3' of the signal sequence. This additional exon does not encode a 60 amino acid repeat. The sizes of the mature proteins predicted from the cDNA sequences are 43,998 Mr and 48,680 Mr; however, antisera raised against carboxy-terminal sequences detects a 70,000 Mr protein from murine fibroblasts suggesting a high degree of post-translational modification of the mature protein. A comparison of these murine gene sequences with a partial human CR1 sequence suggests that the human CR1 gene evolved by direct duplication of the ancestral coding sequences contained within these murine genes including those sequences important for membrane anchoring and cytoplasmic protein attachment.


Assuntos
Sequência de Bases , Complemento C3b/metabolismo , Receptores de Complemento/genética , Homologia de Sequência do Ácido Nucleico , Sequência de Aminoácidos , Animais , Clonagem Molecular , DNA/isolamento & purificação , Variação Genética , Humanos , Camundongos , Dados de Sequência Molecular , Família Multigênica , RNA Mensageiro/isolamento & purificação , Receptores de Complemento/isolamento & purificação , Sequências Repetitivas de Ácido Nucleico , Baço/análise , Transcrição Genética
14.
Cardiovasc Res ; 19(10): 613-22, 1985 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-4053137

RESUMO

Male and female guinea pigs underwent immunisation with heterologous heart protein (rat heart), complete Freund's adjuvant and pertussis vaccine (immunised) or normal saline (control) at weekly intervals for 6 weeks, and were subsequently studied. In vivo intracardiac pressures, cardiac outputs, blood volumes, in vitro pressure-volume relations, left ventricular collagen contents, light microscopy, direct immunofluorescence, lymphocyte stimulation studies, and serology for circulating anti heart antibody (haemagglutination and radioimmunoassay) were performed. Immunised guinea pigs studied between 5 and 8 weeks following the immunisation protocol demonstrated a 44% increase in LVEDP (p less than 0.005), an increase in right atrial pressure (p less than 0.001), although no change in aortic pressure or cardiac output when compared with controls. Left ventricular weight was increased 20% (p less than 0.001), and in vitro left ventricular volume by 34% (at 8 mmHg distending pressure, p less than 0.001). Lung wet weight was increased 44% (p less than 0.005), and left ventricular collagen content increased 60% (p less than 0.001). Cultured lymphocytes from treated guinea pigs demonstrated a 1.5- to 4.5-fold (dependent upon proximity to last immunisation) increase in radiolabelled thymidine uptake when incubated with guinea pig heart protein compared to controls (p less than 0.001), and circulating anti guinea pig heart antibodies were detected by haemagglutination and radioimmunoassay. Histological examination of the left ventricles revealed inflammatory cell infiltration and myocyte increase to varying degrees in 15 of the 18 treated animals. We conclude that inflammatory, probably immune-mediated, chronic myocarditis can be produced in the guinea pig.


Assuntos
Doenças Autoimunes/imunologia , Modelos Animais de Doenças , Miocardite/imunologia , Animais , Pressão Sanguínea , Volume Sanguíneo , Feminino , Cobaias , Imunização , Masculino , Miocardite/patologia , Miocárdio/imunologia , Miocárdio/patologia , Vacina contra Coqueluche/farmacologia , Proteínas/imunologia , Proteínas/farmacologia , Ratos
15.
Am J Obstet Gynecol ; 152(1): 91-7, 1985 May 01.
Artigo em Inglês | MEDLINE | ID: mdl-3993718

RESUMO

Heart rate and stroke volume were measured serially in subjects at rest in the sitting position and at the onset and end of a 6-minute period of upright bicycle exercise. Twenty-three subjects with normal pregnancy were studied in late gestation and again post partum. Rest and exercise cardiac outputs in late gestation were not different from those in the postpartum period. Heart rate was higher at rest and stroke volume lower during exercise in late gestation than post partum. At the end of exercise, stroke volume fell dramatically in late gestation but not post partum. Ten women prospectively identified as physically fit had responses that were not different from those of the nonfit cohort in late gestation. Post partum, the physically fit women had exercise responses typical of trained persons and different from those of the nonfit cohort. In late gestation, rest and exercise hemodynamics in subjects in the sitting position appeared to be dominated by factors influencing venous return, independent of physical fitness.


Assuntos
Idade Gestacional , Hemodinâmica , Esforço Físico , Aptidão Física , Gravidez , Peso ao Nascer , Pressão Sanguínea , Débito Cardíaco , Feminino , Frequência Cardíaca , Humanos , Recém-Nascido , Volume Sistólico
16.
Med Clin North Am ; 69(1): 97-108, 1985 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-3974369

RESUMO

Theoretical arguments suggest that cardiovascular fitness would be desirable during pregnancy but that high-intensity exercise should be avoided; both notions require rigorous testing. Moderate exercise, by normal women with uncomplicated pregnancy, does not appear to affect fetal health. Coexisting maternal medical or obstetrical complications may contraindicate exercise.


Assuntos
Esforço Físico , Gravidez , Animais , Débito Cardíaco , Feminino , Feto/fisiologia , Ventrículos do Coração/anatomia & histologia , Hemostasia , Humanos , Educação Física e Treinamento/métodos , Complicações na Gravidez , Fluxo Sanguíneo Regional , Respiração , Volume Sistólico , Fatores de Tempo , Útero/irrigação sanguínea
17.
Respir Physiol ; 45(3): 229-41, 1981 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-6800005

RESUMO

We studied the rates of change of expired ventilation (VE, BTPS), O2 consumption (VO2, STPD) and CO2 production (VCO2, STPD) at the start and stop of 6 min of 50-W bicycle exercise, comparing 20 healthy young women at 38 weeks of pregnancy (G) and 3 months postpartum (NG). VO2, VCO2 and VE were significantly greater at rest for G than for NG. The absolute increases of VO2 and VCO2 from steady-state rest (SSR) to steady-state exercise (SSE) were the same for G and NG. The absolute increase of VE from SSR to SSE was significantly greater for G than NG. VCO2 and VE increased more rapidly in G than NG, but only during the first 90 sec of exercise. Recovery rates after exercise were equal for G and NG. We believe that lower extremity muscles of G contract on more distended veins at the onset of exercise, forcing increased volumes of venous blood through the lungs, increasing VO2 and VCO2. VE follows VCO2 closely.


Assuntos
Consumo de Oxigênio , Esforço Físico , Período Pós-Parto , Terceiro Trimestre da Gravidez , Respiração , Adulto , Dióxido de Carbono/metabolismo , Feminino , Humanos , Músculos/irrigação sanguínea , Músculos/metabolismo , Gravidez , Fluxo Sanguíneo Regional
18.
Am J Obstet Gynecol ; 137(5): 575-8, 1980 Jul 01.
Artigo em Inglês | MEDLINE | ID: mdl-6770689

RESUMO

Fetal breathing movements (FBM) in unanesthetized lambs in utero were correlated with measurements of arterial blood gases. One hundred and eighty-seven observations, consisting of the incidence of FBM during the hour preceding and the hour after the blood gas determinations, were made on 125 separate days in 30 fetuses of 117 to 146 days' gestational age. Fifty-eight percent of the observations with fetal apnea (FBM 0 to 9% in 2 hours) showed hypoxia (PaO2 less than or equal to 16 torr), whereas only 4% of the observations with FBM greater than 10% were associated with hypoxia. Sevety-eight percent of the hypoxic and normocarbic (PaCO2 42 to 53 torr) observations demonstrated apnea. However, only 44% of hypoxic plus hypercarbic (PaCO2 57 to 63 torr) fetuses were apneic, and with an elevated PaCO2, apnea tended to develop at a lower level of PaO2. We conclude that FBM may persist in the presence of hypercarbia with hypoxia.


Assuntos
Apneia/sangue , Dióxido de Carbono/sangue , Oxigênio/sangue , Animais , Feminino , Feto/fisiologia , Idade Gestacional , Hipercapnia/sangue , Movimento , Respiração , Ovinos
19.
Circulation ; 59(2): 280-5, 1979 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-215339

RESUMO

Acute left circumflex coronary artery (LC) occlusion in conscious dogs caused marked ischemia in the myocardium supplied by the occluded artery, as judged by the radioactive microsphere technique for determining blood flow distribution. With the chest open, LC pressure distal to the occlusion fell to 21 +/- 1.9% of aortic pressure. By 8 weeks after gradual LC occlusion with an ameroid constrictor, collateral development had restored coronary blood flow distribution to near-normal under basal conditions and during pacing, at a heart rate of 200 beats/min. The only evidence for ischemia was in the subepicardium within the distribution of the unoccluded left anterior descending artery, which provided the extra collateral blood flow. Distal LC pressure was 70 +/- 1.7% of aortic pressure. Propranolol 160 mg orally every 6 hours for 8 weeks had no detectable effect on coronary collateral development, as judged by blood flow distribution or distal LC pressure. The only significant difference for the propranolol dogs was a slight transmural shift away from the subendocardium in the left anterior descending region.


Assuntos
Circulação Colateral/efeitos dos fármacos , Circulação Coronária/efeitos dos fármacos , Doença das Coronárias/fisiopatologia , Propranolol/farmacologia , Receptores Adrenérgicos beta/efeitos dos fármacos , Receptores Adrenérgicos/efeitos dos fármacos , Animais , Pressão Sanguínea/efeitos dos fármacos , Estimulação Cardíaca Artificial , Cães , Frequência Cardíaca/efeitos dos fármacos , Injeções Intravenosas , Microesferas , Propranolol/administração & dosagem
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