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Effect of changes in heart rate on pressure half time in normally functioning mitral valve prostheses.

机译：心率变化对正常运行的二尖瓣假体压力半衰期的影响。

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摘要

To test the validity of a relation between the pressure half time and the diastolic time interval, previously shown in a pulse duplication system, eight patients with prosthetic mitral valves and permanent pacemaker systems were studied. Recordings were made from the apex by continuous wave or pulsed Doppler echocardiography at heart rates between 75 and 150 beats/min. The pressure half time was found to be closely correlated with the diastolic time interval although there was individual variation and in three prostheses the pressure half time attained a plateau when the diastolic time interval was more than 300 ms. It is likely that the orifice area is the main controller of pressure half time where there is stenosis of the prosthesis, but that other factors such as ventricular or atrial compliance and the diastolic time interval may modify or obscure the effect of orifice area in normally functioning prosthetic valves.

机译：为了测试先前在脉冲复制系统中显示的压力半衰期与舒张时间间隔之间关系的有效性，研究了八名具有人工二尖瓣和永久起搏器系统的患者。通过连续波或脉冲多普勒超声心动图从心尖以75至150次/分钟的心率记录心律。尽管存在个体差异，但发现压力半衰期与舒张时间间隔密切相关，并且在三个假体中，当舒张时间间隔大于300 ms时，压力半衰期达到平稳。在假体狭窄的情况下，孔口面积可能是压力半衰期的主要控制者，但其他因素（例如，心室或心房顺应性以及舒张时间间隔）可能会改变或掩盖孔口面积对正常功能的影响人工瓣膜。

著录项

期刊名称 British Heart Journal
作者
J Chambers; N McLoughlin; A Rapson; G Jackson;
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作者单位

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年(卷),期 1988(60),6
年度 1988
页码 502–506
总页数 5
原文格式 PDF
正文语种
中图分类心血管疾病;
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专利

1. Impact of cardiac rhythm on mitral valve area calculated by the pressure half time method in patients with moderate or severe mitral stenosis. [J] . Kim HK, Kim YJ, Chang SA, Journal of the American Society of Echocardiography: official publication of the American Society of Echocardiography . 2009,第1期

机译：通过中压或重度二尖瓣狭窄患者的压力半时法计算的心律对二尖瓣面积的影响。
2. Determination of mitral valve area with echocardiography, using intra-operative 3-dimensional versus intra- & post-operative pressure half-time technique in mitral valve repair surgery [J] . Woon-Seok Kang, Jae Won Choi, Joo-Eun Kang, Journal of Cardiothoracic Surgery . 2013,第S1期

机译：超声心动图确定二尖瓣面积，采用术中3维术与术中和术后压力半时技术进行二尖瓣修复手术
3. Mitral valve area by the pressure half-time method does not correlate with mean gradient in mitral valve repair patients. [J] . House CM, Nelson WB, Nickele GA, European journal of echocardiography: the journal of the Working Group on Echocardiography of the European Society of Cardiology . 2011,第2期

机译：半压半衰期方法的二尖瓣面积与二尖瓣修复患者的平均梯度不相关。
4. A HIGH FIDELITY, MICRO-STRUCTURAL ANATOMICALLY ACCURATE 3D FINITE ELEMENT MODEL FOR FUNCTIONING HEART MITRAL VALVE [C] . Chung-Hao Lee, Pim J.A. Oomen, Jean Pierre Rabbah, ASME bioengineering conference . 2014

机译：高功能，微结构和精确的3D有限元模型，用于功能性心脏瓣膜功能
5. A new methodology in accelerated testing of mechanical heart valve prostheses. [D] . Wu, Changfu. 2003

机译：机械心脏瓣膜假体加速测试的新方法。
6. Determination of mitral valve area with echocardiography using intra-operative 3-dimensional versus intra- post-operative pressure half-time technique in mitral valve repair surgery [O] . Woon-Seok Kang, Jae Won Choi, Joo-Eun Kang, 2013

机译：通过超声心动图确定二尖瓣修复手术中的术中3维与术中和术后压力半时技术的比较
7. Effect of changes in heart rate on pressure half time in normally functioning mitral valve prostheses. [O] . Chambers, J, McLoughlin, N, Rapson, A, 1988

机译：心率变化对正常运行的二尖瓣假体压力半衰期的影响。
8. Insufficiency and Pressure Loss of Artificial Heart Valves in Mitral-Position [R] . Richter, H. , Schoenmackers, J. 1978

机译：二尖瓣位置人工心脏瓣膜功能不全和压力损失

Effect of changes in heart rate on pressure half time in normally functioning mitral valve prostheses.

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