OBJECTIVE Obstructive sleep apnea(OSA)is a potential cardiovascular risk.We aimed to investigate the association of OSA with heart rhythm disorders and prognosis in elderly patients with new-onset acute myocardial inf...OBJECTIVE Obstructive sleep apnea(OSA)is a potential cardiovascular risk.We aimed to investigate the association of OSA with heart rhythm disorders and prognosis in elderly patients with new-onset acute myocardial infarction(AMI).METHODS We prospectively enrolled 252 AMI elderly patients(mean age,68.5±6.9 years)who were undergoing revascularization and completed a sleep study during their hospitalization.All subjects were categorized into non-OSA(apnea–hypopnea index(AHI)<15,n=130)and OSA(AHI≥15,n=122)groups based on the AHI.The changes in the autonomic nervous system,incidence of arrhythmia during nocturnal sleep,and major adverse cardiovascular and cerebrovascular events(MACCEs)were compared between the groups.RESULTS The mean AHI value in all AMI patients was 22.8±10.9.OSA patients showed higher levels of body mass index and peak high-sensitivity C-reactive protein and lower levels of minimum nocturnal oxygen saturation(Min Sa O2),as well as greater proportion of multivessel coronary artery disease(all P<0.05).The OSA group also showed significant increases in heart rate variability and heart rate turbulence onset(both P<0.05)and higher incidence of arrhythmia(including sinus,atrial,and ventricular in origin).At a median follow-up of 6 months(mean 0.8–1.6 years),OSA(AHI≥15)combined with hypoxia(Min Sa O2≤80%)was independently associated with the incidence of MACCEs(hazard ratio[HR]:4.536;95%confidence interval[CI]:1.461-14.084,P=0.009)after adjusting for traditional risk factors.CONCLUSIONS OSA and OSA-induced hypoxia may correlate with the severity of myocardial infarction,increase the occurrence of heart rhythm disorders in elderly subacute MI patients,and worsen their short-term poor outcomes.展开更多
Background:The basic exercise involved in TCC is a series of individual movements that are linked together in a continuous manner and that flow smoothly from one movement to another.Deep breathing and mental concentra...Background:The basic exercise involved in TCC is a series of individual movements that are linked together in a continuous manner and that flow smoothly from one movement to another.Deep breathing and mental concentration are also required to achieve harmony展开更多
AIM: To assess the efficacy and safety of antithrombotic drugs(antiplatelet or anticoagulant drugs) compared to no antithrombotic treatment or placebo in patients with heart failure(HF) and sinus rhythm. METHODS: We s...AIM: To assess the efficacy and safety of antithrombotic drugs(antiplatelet or anticoagulant drugs) compared to no antithrombotic treatment or placebo in patients with heart failure(HF) and sinus rhythm. METHODS: We searched Medline and Cochrane Library for randomized controlled trials evaluating antithrombotic treatment and no antithrombotic treatment in patients with HF and sinus rhythm. Risk ratio(RR) and 95%CIs were estimated performing meta-analysis with random effects method. RESULTS: Two studies met the inclusion criteria: Heart failure Long-term Antithrombotic Study and Warfarin/Aspirin Study in Heart failure, with 336 patients and mean follow-up 1.8-2.25 years. Stroke risk was not reduced by acetylsalicylic acid(RR = 1.18, 95%CI: 0.17-8.15), oral anticoagulation(RR = 0.30, 95%CI: 0.03-2.65) or overall antithrombotic drugs(RR = 0.52, 95%CI: 0.10-2.74). Acetylsalicylic acid showed a significant increased risk of worsening HF(RR = 1.78, 95%CI: 1.08-2.92), while oral anticoagulation had no impact in this outcome(RR = 1.03, 95%CI: 0.61-1.75). Overall antithrombotic drugs showed a significant risk increase of major bleeding(RR = 6.99, 95%CI: 0.89-54.64). CONCLUSION: Best available evidence does not support the routine use of antithrombotic drugs in patients with HF and sinus rhythm. These drugs, particularly oral anti-coagulation has the hazard of increase significantly major bleeding risk.展开更多
This paper reports that the synchronous integer multiple oscillations of heart-cell networks or clusters are observed in the biology experiment. The behaviour of the integer multiple rhythm is a transition between sup...This paper reports that the synchronous integer multiple oscillations of heart-cell networks or clusters are observed in the biology experiment. The behaviour of the integer multiple rhythm is a transition between super- and sub- threshold oscillations, the stochastic mechanism of the transition is identified. The similar synchronized oscillations are theoretically reproduced in the stochastic network composed of heterogeneous cells whose behaviours are chosen as excitable or oscillatory states near a Hopf bifurcation point. The parameter regions of coupling strength and noise density that the complex oscillatory rhythms can be simulated are identified. The results show that the rhythm results from a simple stochastic alternating process between super- and sub-threshold oscillations. Studies on single heart cells forming these clusters reveal excitable or oscillatory state nearby a Hopf bifurcation point underpinning the stochastic alternation. In discussion, the results are related to some abnormal heartbeat rhythms such as the sinus arrest.展开更多
Fluctuations in autonomic cardiovascular regulation during exposure to high altitude may increase the risk of heart attack during waking and sleep. This study compared heart rate variability (HVR) and its components d...Fluctuations in autonomic cardiovascular regulation during exposure to high altitude may increase the risk of heart attack during waking and sleep. This study compared heart rate variability (HVR) and its components during sleep at low altitude and after 30 - 41 hours of acclimatization at high altitude (3480 m) in five mountain marathon runners controlled for diet, drugs, light-dark cycle and jet lag. In comparison to sea level, RR-intervals during sleep at high altitude decreased significantly (P 0.001). The significant increase in sympathetic autonomic cardiovascular modulation at high altitude protects against excessive oxygen deprivation during sleep. Increases in R-R intervals can require longer periods of acclimatization at3480 m to mitigate the effects of altitude/hypoxia on sympathetic tone, thus reducing cardiovascular distress at rest during waking and sleep and probably before during and after athletic performance at altitude.展开更多
目的分析首次诊断为心力衰竭(heart failure,HF)的窦性心律患者住院期间血浆D-二聚体(D-dimer,D-D)水平、D-D/纤维蛋白原(fibrinogen,FIB)的变化特点,探讨其对血栓形成的预测价值。方法回顾性分析2018-01/2021-11月在作者医院首次诊断...目的分析首次诊断为心力衰竭(heart failure,HF)的窦性心律患者住院期间血浆D-二聚体(D-dimer,D-D)水平、D-D/纤维蛋白原(fibrinogen,FIB)的变化特点,探讨其对血栓形成的预测价值。方法回顾性分析2018-01/2021-11月在作者医院首次诊断为HF窦性心律的165例患者临床资料,根据住院期间是否发生双下肢静脉血栓、左心房血栓、左心室血栓、肺栓塞等血栓事件将患者分为血栓组(n=65)和无血栓组(n=100),比较两组患者基线资料、辅助检查、实验室检查等指标,分析窦性心律HF患者发生血栓的危险因素。结果与无血栓组比较,血栓组患者的年龄大、住院时间长,D-D、FIB、纤维蛋白降解产物(fibrin degradation products,FDP)、Ⅶ因子活性、超敏C反应蛋白(high sensitive c-reactive protein hs-CRP)水平明显升高,D-D/FIB明显降低,组间比较差异具有统计学意义(P均<0.05)。采用受试者工作特征(receiver operating characteristic,ROC)曲线显示,D-D的临界值为455.5μg/L,曲线下面积(area under the curve,AUC)为0.715(95%CI:0.638~0.792);FIB的临界值为3.045,AUC为0.92(95%CI:0.881~0.96)。二元Logistic回归模型分析显示,住院时间(OR=1.907,95%CI:1.324~2.746)、D-D水平(OR=1.024,95%CI:1.002~1.046)、D-D/FIB(OR=0.930,95%CI:0.866~0.998)是首次确诊为HF窦性心律住院患者形成血栓的影响因素。结论住院时间、D-D、D-D/FIB是评估首诊HF窦性心律患者形成血栓的预测因素,对动态观察、指导预防性抗凝治疗有重要临床意义。展开更多
基金supported by National Natural Science Youth Fund of China(81100098)Shanghai Municipal Commission of Health and Family Planning for Key Discipline Establishment(2015ZB0503&201840083)Production,Teaching and Research Program for University Teachers in Shanghai(RC20190079)。
文摘OBJECTIVE Obstructive sleep apnea(OSA)is a potential cardiovascular risk.We aimed to investigate the association of OSA with heart rhythm disorders and prognosis in elderly patients with new-onset acute myocardial infarction(AMI).METHODS We prospectively enrolled 252 AMI elderly patients(mean age,68.5±6.9 years)who were undergoing revascularization and completed a sleep study during their hospitalization.All subjects were categorized into non-OSA(apnea–hypopnea index(AHI)<15,n=130)and OSA(AHI≥15,n=122)groups based on the AHI.The changes in the autonomic nervous system,incidence of arrhythmia during nocturnal sleep,and major adverse cardiovascular and cerebrovascular events(MACCEs)were compared between the groups.RESULTS The mean AHI value in all AMI patients was 22.8±10.9.OSA patients showed higher levels of body mass index and peak high-sensitivity C-reactive protein and lower levels of minimum nocturnal oxygen saturation(Min Sa O2),as well as greater proportion of multivessel coronary artery disease(all P<0.05).The OSA group also showed significant increases in heart rate variability and heart rate turbulence onset(both P<0.05)and higher incidence of arrhythmia(including sinus,atrial,and ventricular in origin).At a median follow-up of 6 months(mean 0.8–1.6 years),OSA(AHI≥15)combined with hypoxia(Min Sa O2≤80%)was independently associated with the incidence of MACCEs(hazard ratio[HR]:4.536;95%confidence interval[CI]:1.461-14.084,P=0.009)after adjusting for traditional risk factors.CONCLUSIONS OSA and OSA-induced hypoxia may correlate with the severity of myocardial infarction,increase the occurrence of heart rhythm disorders in elderly subacute MI patients,and worsen their short-term poor outcomes.
文摘Background:The basic exercise involved in TCC is a series of individual movements that are linked together in a continuous manner and that flow smoothly from one movement to another.Deep breathing and mental concentration are also required to achieve harmony
文摘AIM: To assess the efficacy and safety of antithrombotic drugs(antiplatelet or anticoagulant drugs) compared to no antithrombotic treatment or placebo in patients with heart failure(HF) and sinus rhythm. METHODS: We searched Medline and Cochrane Library for randomized controlled trials evaluating antithrombotic treatment and no antithrombotic treatment in patients with HF and sinus rhythm. Risk ratio(RR) and 95%CIs were estimated performing meta-analysis with random effects method. RESULTS: Two studies met the inclusion criteria: Heart failure Long-term Antithrombotic Study and Warfarin/Aspirin Study in Heart failure, with 336 patients and mean follow-up 1.8-2.25 years. Stroke risk was not reduced by acetylsalicylic acid(RR = 1.18, 95%CI: 0.17-8.15), oral anticoagulation(RR = 0.30, 95%CI: 0.03-2.65) or overall antithrombotic drugs(RR = 0.52, 95%CI: 0.10-2.74). Acetylsalicylic acid showed a significant increased risk of worsening HF(RR = 1.78, 95%CI: 1.08-2.92), while oral anticoagulation had no impact in this outcome(RR = 1.03, 95%CI: 0.61-1.75). Overall antithrombotic drugs showed a significant risk increase of major bleeding(RR = 6.99, 95%CI: 0.89-54.64). CONCLUSION: Best available evidence does not support the routine use of antithrombotic drugs in patients with HF and sinus rhythm. These drugs, particularly oral anti-coagulation has the hazard of increase significantly major bleeding risk.
基金supported by the National Natural Science Foundation of China (Grant Nos. 10772101 and 30670533)the National High Technology Research and Development Program of China (Grant No. 2007AA02Z310)the Fundamental Research Funds for the Central Universities (Grant No. GK200902025)
文摘This paper reports that the synchronous integer multiple oscillations of heart-cell networks or clusters are observed in the biology experiment. The behaviour of the integer multiple rhythm is a transition between super- and sub- threshold oscillations, the stochastic mechanism of the transition is identified. The similar synchronized oscillations are theoretically reproduced in the stochastic network composed of heterogeneous cells whose behaviours are chosen as excitable or oscillatory states near a Hopf bifurcation point. The parameter regions of coupling strength and noise density that the complex oscillatory rhythms can be simulated are identified. The results show that the rhythm results from a simple stochastic alternating process between super- and sub-threshold oscillations. Studies on single heart cells forming these clusters reveal excitable or oscillatory state nearby a Hopf bifurcation point underpinning the stochastic alternation. In discussion, the results are related to some abnormal heartbeat rhythms such as the sinus arrest.
文摘Fluctuations in autonomic cardiovascular regulation during exposure to high altitude may increase the risk of heart attack during waking and sleep. This study compared heart rate variability (HVR) and its components during sleep at low altitude and after 30 - 41 hours of acclimatization at high altitude (3480 m) in five mountain marathon runners controlled for diet, drugs, light-dark cycle and jet lag. In comparison to sea level, RR-intervals during sleep at high altitude decreased significantly (P 0.001). The significant increase in sympathetic autonomic cardiovascular modulation at high altitude protects against excessive oxygen deprivation during sleep. Increases in R-R intervals can require longer periods of acclimatization at3480 m to mitigate the effects of altitude/hypoxia on sympathetic tone, thus reducing cardiovascular distress at rest during waking and sleep and probably before during and after athletic performance at altitude.
文摘目的分析首次诊断为心力衰竭(heart failure,HF)的窦性心律患者住院期间血浆D-二聚体(D-dimer,D-D)水平、D-D/纤维蛋白原(fibrinogen,FIB)的变化特点,探讨其对血栓形成的预测价值。方法回顾性分析2018-01/2021-11月在作者医院首次诊断为HF窦性心律的165例患者临床资料,根据住院期间是否发生双下肢静脉血栓、左心房血栓、左心室血栓、肺栓塞等血栓事件将患者分为血栓组(n=65)和无血栓组(n=100),比较两组患者基线资料、辅助检查、实验室检查等指标,分析窦性心律HF患者发生血栓的危险因素。结果与无血栓组比较,血栓组患者的年龄大、住院时间长,D-D、FIB、纤维蛋白降解产物(fibrin degradation products,FDP)、Ⅶ因子活性、超敏C反应蛋白(high sensitive c-reactive protein hs-CRP)水平明显升高,D-D/FIB明显降低,组间比较差异具有统计学意义(P均<0.05)。采用受试者工作特征(receiver operating characteristic,ROC)曲线显示,D-D的临界值为455.5μg/L,曲线下面积(area under the curve,AUC)为0.715(95%CI:0.638~0.792);FIB的临界值为3.045,AUC为0.92(95%CI:0.881~0.96)。二元Logistic回归模型分析显示,住院时间(OR=1.907,95%CI:1.324~2.746)、D-D水平(OR=1.024,95%CI:1.002~1.046)、D-D/FIB(OR=0.930,95%CI:0.866~0.998)是首次确诊为HF窦性心律住院患者形成血栓的影响因素。结论住院时间、D-D、D-D/FIB是评估首诊HF窦性心律患者形成血栓的预测因素,对动态观察、指导预防性抗凝治疗有重要临床意义。
