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Ying Yong Sheng Tai Xue Bao ; 31(9): 2977-2984, 2020 Sep 15.
Artigo em Chinês | MEDLINE | ID: mdl-33345498


Stellera chamaejasme is one of most common poisonous plant species in degraded grasslands of China. S. chamaejasme could dominate the community in some severely degraded grasslands, which is a serious threat to the sustainable development of animal husbandry in natural grasslands. In this study, S. chamaejasme population was divided into 10 age classes according to the number of branches. We investigated the age structure of S. chamaejasme population and population dynamic indices, and quantified the survival status of S. chamaejasme population by compiling a static life table, drawing a survival curve, conducting survival analysis. The age structure of S. chamaejasme population in the study area was growth type. The number of individuals in Ⅰ age class was sufficient but with relatively low survival rate. The population structure of S. chamaejasme was fitted the growing type. The development process of population was fluctuating. The number of individuals would drop sharply in Ⅱ and Ⅷ, indicating that these two age classes were the bottleneck period in the development of S. chamaejasme population. The survival curves of S. chamaejasme population was the Deevey-Ⅱ type. The results of survival analysis showed that the population had a sharp decrease in the early stage and was stable in the later stage, which was because the value of fx and λx of S. chamaejasme in Ⅰ or Ⅱ age class were the highest. In conclusion, sufficient young individuals (Ⅰ) was the basis for the expansion of S. chamaejasme population in the degraded typical steppe. The low transformation rate of young individuals to adults might be one of the reasons explaining why S. chamaejasme population could not expand rapidly in the early stage of grassland degradation. Therefore, it was suggested to intervene early when the number of S. chamaejasme was limited.

Thymelaeaceae , Animais , China , Humanos
Herz ; 2020 Apr 14.
Artigo em Inglês | MEDLINE | ID: mdl-32291483


OBJECTIVE: The aim of this study was to explore the relationship between arrhythmia-associated or electrocardiogram (ECG)-associated common variants and PR interval, QRS duration, QTcorrected, and heart rate in a Chinese cohort. METHODS: We studied the association between 26 single-nucleotide polymorphisms (SNPs) and digital ECG data from 379 unrelated Han Chinese individuals collected in an epidemiological survey in Beijing. All subjects were 45 years of age or older and were free of cardiovascular diseases and diabetes. The SNPs were genotyped in a multiplex panel using the Sequenom MassARRAY platform. RESULTS: Missense variant T66A (Thr66Ala, rs4074536) of the CASQ2 gene, which was previously reported to be associated with QRS complex in European populations, was significantly associated with PR interval prolongation in our sample (padjusted = 0.006, betaadjusted = 3.983 ms). A two-tailed t test showed that the CC genotype (n = 86) had a significantly longer PR interval (162.9 ± 19.4 ms) than the non-CC genotypes (n = 288, PR interval: 154.6 ± 20.9 ms), with a remarkable difference of 8.2 ms between the groups (p = 0.001). Interestingly, this association between T66A of CASQ2 and PR interval was more evident in females (padjusted = 0.007, betaadjusted = 5.723 ms) than in males (padjusted = 0.177, betaadjusted = 2.725 ms). In addition, rs3822714 in the HAND1 locus might be associated with QRS duration (padjusted = 0.034, betaadjusted = -2.268 ms). CONCLUSION: We identified a novel signal of an association between the CC genotype of T66A in CASQ2 and PR interval prolongation in a Chinese population, particularly in females. This association deserves further exploration given its possible effects on calcium handling in cardiac electrophysiology.

Sleep Breath ; 19(4): 1199-203, 2015 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-25680548


PURPOSE: This study aimed to determine blood pressure characteristics and long-term progress in patients with white coat hypertension (WCH) and obstructive sleep apnea (OSA). METHODS: Systolic blood pressure (SBP) and diastolic blood pressure (DBP) and sleep test results over a period of 26 months were analyzed from WCH patients with OSA (n = 28), WCH patients (n = 23), and healthy control subjects (n = 27). RESULTS: At the end of observation, WCH patients with OSA presented significantly increased daytime and nighttime BP and lower diurnal difference of SBP (all Ps < 0.05) and the increased rate of "non-dipper" status (SBP 28.6 %, DBP 32.1 %) was significantly higher when compared with WCH and control groups (all Ps < 0.01). Sustained hypertension was observed in 42.8 % of the WCH patients with OSA, which was significantly higher than that in the WCH and control groups (Ps < 0.01) and was predicted by non-dipper status via 24-h ambulatory SBP/DBP monitoring (Ps < 0.05). CONCLUSION: WCH may represent a prehypertension status, which could develop into sustained hypertension with OSA.

Apneia Obstrutiva do Sono/diagnóstico , Apneia Obstrutiva do Sono/fisiopatologia , Hipertensão do Jaleco Branco/diagnóstico , Hipertensão do Jaleco Branco/fisiopatologia , Adulto , Idoso , Ritmo Circadiano/fisiologia , Estudos Transversais , Suscetibilidade a Doenças , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Análise Multivariada , Fatores de Risco , Apneia Obstrutiva do Sono/epidemiologia , Hipertensão do Jaleco Branco/epidemiologia
Europace ; 16(9): 1309-14, 2014 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-24696222


AIMS: An association between obstructive sleep apnoea (OSA) and atrial fibrillation (AF) has been established. However, studies on the role of OSA in AF recurrence after catheter ablation have yielded conflicting results, and the effect of OSA treatment by continuous positive airway pressure (CPAP) on the success rate of AF catheter ablation is indeterminate. The aim of this meta-analysis was to investigate the rate of AF recurrence after catheter ablation in patients with AF with or without OSA and to evaluate the relationship between CPAP therapy and AF recurrence. METHODS AND RESULTS: We performed an online search and identified five studies involving 3743 patients with AF. Patients with OSA had a 31% greater risk of AF recurrence after catheter ablation than did patients without OSA [relative ratio (RR) = 1.31, P = 0.00], and this risk increased by 57% in patients with OSA not undergoing CPAP therapy (RR = 1.57, P = 0.00). However, CPAP users had a risk of AF recurrence similar to that of patients without OSA (RR = 1.25, P = 0.37), and this similarity was maintained even after the removal of study heterogeneity (RR = 0.99, P = 0.39). CONCLUSION: Obstructive sleep apnoea was associated with AF recurrence after catheter ablation. The efficacy of catheter ablation for AF was similar between patients without OSA and patients with OSA undergoing CPAP treatment.

Fibrilação Atrial/epidemiologia , Fibrilação Atrial/cirurgia , Ablação por Cateter/estatística & dados numéricos , Pressão Positiva Contínua nas Vias Aéreas/estatística & dados numéricos , Apneia Obstrutiva do Sono/epidemiologia , Apneia Obstrutiva do Sono/terapia , Comorbidade , Humanos , Estudos Observacionais como Assunto , Prevalência , Recidiva , Fatores de Risco , Resultado do Tratamento
J Altern Complement Med ; 19(1): 43-9, 2013 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-22823583


OBJECTIVES: This study assessed the importance of the Traditional Chinese Medicine (TCM) pattern on an acupoint-specific effect. DESIGN: This was a TCM pattern subdivision analysis of the first intervention data from a multicenter, randomized, controlled trial (ISRCTN24863192) (the main trial). SETTINGS: The main trial recruited participants from six hospitals in three provinces in China. SUBJECTS: Five hundred and one (501) participants diagnosed with primary dysmenorrhea (PD) were enrolled in the main trial. INTERVENTIONS: The main trial randomly and equally divided participants into three treatment groups with bilateral electroacupuncture at three sites, respectively: Sanyinjiao (SP6), Xuanzhong (GB39), and an adjacent nonacupoint. Participants were diagnosed with TCM patterns before the treatment. The intervention was carried out when the visual analogue scale (VAS) score of participant's menstrual pain was ≥ 40 mm on the first day of menstruation and lasted for 30 minutes. OUTCOME MEASURES: The immediate improvement of pain was measured with a 100-mm VAS before the intervention, at 5 minutes, 10 minutes, and 30 minutes during the intervention, and at 30 minutes after the completion of this intervention. RESULTS: Three (3) TCM patterns (n=320) were eligible for analysis, including Cold and Dampness Stagnation pattern (n=184), Qi and Blood Stagnation pattern (n=84), and Qi and Blood Deficiency pattern (n=52). In Cold and Dampness Stagnation pattern, the SP6 group had a significant reduction in VAS scores compared with the GB39 group (mean difference -7.6 mm) and the nonacupoint group (mean difference -8.2 mm), respectively. There was no difference between the latter two groups. There were no group differences in VAS scores in the other two patterns. CONCLUSIONS: It suggested that TCM pattern might affect acupoint specific effect on the immediate pain relief obtained for participants with PD.

Pontos de Acupuntura , Diagnóstico Diferencial , Dismenorreia , Eletroacupuntura , Medicina Tradicional Chinesa , Menstruação , Adulto , Dismenorreia/diagnóstico , Dismenorreia/terapia , Feminino , Humanos , Medição da Dor , Índice de Gravidade de Doença , Adulto Jovem