心房收缩

心房收缩峰速（A）和快速充盈峰速（E）之比降低。

The ratio of peak velocity at atrial contraction ( A ) and rapid filling ( E ) declined .

S4的出现意味着心房收缩好，房性纤颤病人无S4。

The presence of an S4 implies effective atrial contraction ; it is never heard in atrial fibrillation .

右位心胎儿DV多普勒血流波形的心房收缩波近缺失。

DV Doppler waveform of this dextrocardia fetus showed a nearly ab - sent atrial systole wave .

结论：Mel对离体豚鼠左心房收缩具双向作用，对右心房具正性频率作用。

CONCLUSION : Mel possesses a biphasic effect on left atria and a positive chronotropic effect on right atria .

方法：测定Pro大鼠和正常鼠左心室乳头状肌和右心房收缩力和心率。

METHODS : The positive inotropic and chronotropic effects mediated by α 1A and α 1B subtypes were determined on isolated left ventricular papillary muscles and right atrium in Pro - and NaCl-treated rats .

测量CFV血流频谱参数：逆向的心房收缩波峰值速度（Va）和持续时间（Ta）。

The Doppler parameters of CFV : the retrograde a wave-velocity peak ( Va ) and duration time ( Ta ) were obtained .

本文通过心阻抗图，心音图及心电图法对高血压患者的心房收缩时间间期（ASTI）进行了研究。

Atrial systolic time intervals ( ASTI ) measured by cardiac impedance plethysmogram , phonocardiogram and electrocardiogram were studied in control and hypertensive subjects .

目的探讨法乐四联症（TOF）矫治手术前后及随访中左、右心室功能及左心房收缩功能的变化。

Objective To evaluate the changes of left , right ventricular ( LV ) volume and function and left atrial ( LA ) contraction function before and after surgical rectifying in patients with tetralogy of fallot ( TOF ) .

组织多普勒测定左右心房收缩和电机械时间

Measurement of Right and Left Atrial Contraction Time and Electromechanical Time by Tissue Velocity Imaging

应变率成像技术评价陈旧性心肌梗死患者左心房收缩功能

Ultrasound evaluation of left atrial function in patients with old myocardial infarction using strain rate imaging

应变率成像及三维超声评估尿毒症患者左心房收缩功能

Evaluation of left atrial systolic function in uremia patients with strain rate imaging and real-time three-dimensional echocardiography

超声定量组织速度成像技术估测高血压病左心房收缩功能

To evaluate left atrial systolic function in the patients with essential hypertension by ultrasound quantitative tissue velocity imaging

不同舒张功能状态下左心房收缩功能的组织多普勒及三维超声心动图研究

Left atrial contraction function evaluation with RT-3DE and Doppler tissue imaging with different left ventricular diastolic function pattern

高血压患者心房收缩时间间期的改变及其与心室舒张期顺应性的关系

The alterations of atrial systolic time intervals in hypertensive patients and its relation to left ventricular diastolic compliance

中度组：部分指标降低，心房收缩波A波无变化；

In the moderate group some of parameters decreased and the A wave caused by aerial contraction had no change .

应变率评价冠心病患者冠脉搭桥术后左心房收缩功能

Evaluation of left atrial systolic function with strain rate imaging in patients with coronary heart disease after coronary artery bypass grafting

心房收缩时，第1组有13例（59%）和第二组全部病例均测到明显的血液逆流入肺静脉。

During atrium contraction , marked retrograde flow into pulmonary veins was determined in 13 patients ( 59 % ) with mild RMS , and in all patients with severe RMS ( p < 0 . 01 ) .

胍乙啶、胍乙哌啶和BD-37明显增强豚鼠心房的收缩，BD-38和BD-31则无此作用。

P , BD-37 and G markedly augmented the contraction of guinea pig auricles , though BD-31 and BD-38 were devoid of this action .

纳络酮对离体心房肌收缩力及搏动频率的作用

The inotropic and chronotropic effects of naloxone on isolated atria

MAF30μM亦能使右心房肌的收缩力降低50±7%，使收缩频率降低60±5%。

The contractility and frequency of rat right atria muscles were decreased to 50 % and 60 % respectively .

瘢痕组织通过阻断紊乱的电传导而终止房颤，该紊乱的电传导会使心房不规律收缩。

The scar tissue stops atrial fibrillation by interfering with chaotic electrical signals that cause the atria to contract irregularly .

结论体外直流电复律后许多患者出现左心房功能降低，心房收缩功能延迟恢复与持续的左房扩大有关；

Conclusions The atrial function was also decreased after external direct current cardioversion and delay in the recovery of atrial contractility in many patients and this was associated with a persistence of LA dilation .

非瓣膜性心房颤动复律后左心房收缩功能改变与心房肌细胞凋亡的关系

The relationship between left atrial systolic function after conversion to sinus rhythm and apoptosis of atrial myocardium in patients with nonvalvular atrial fibrillation

结论：老年高血压和冠心病患者左心房容量增大，左心房主动收缩功能增强。评价左心房收缩功能，左心房射血力的引入是一种新的、较准确和测定时较简便的生理指标。

Conclusion : Left atrial ejection force is a new index for assessing the atrial systolic function , as in elder patients with coronary heart disease and hypertension the left atrium is enlarged with increased contractile function .

目的观察短时间快速心房起搏对犬左、右心房大小及收缩功能的影响。

Objective To observe short-term rapid atrial electrical activation on atrial size and atrial systolic function .

方法：评价45例正常人的左室侧壁、右室游离壁的瓣环，在组织速度曲线上测量心房和心室的电-机械延迟时间、心房收缩时间以及PR间期（PRTV）。

Methods : To assess mitral ( tricuspidal ) annulus of free walls of 45 persons . Atrial and ventricular electromechanical delay time , atrial contraction time , PR interval were acquired in tissue Doppler velocity cure .

结果：左心房的电-机械延迟时间较长，右侧的心房收缩时间和心室的电-机械延迟时间较长。

Results : Electromechanical delay time was longer in left atrium . Atrial contraction time and PR interval were longer in right side .

左心房管道功能与AE、LAEF、RV和左心房主动收缩前容量显著负相关，与左心室舒张功能正相关；

LA booster pump function positively correlated to onset atrial emptying volume and RV , negatively correlate to CV and LV diastolic function . LA conduit function positively correlated to LV diastolic function , negatively correlated to LAEF and AE , RV as well as onset atrial emptying volume .

目的：利用定量组织速度成像技术评价正常人心房和心室的电-机械耦联时间和心房的收缩时间。

Objective : To assess atrial and ventricular electromechanical coupling and atrial contraction time by quantitative tissue Doppler imaging .

AF时心房结构改变对心房的机械功能产生影响，使复律后心房收缩功能延迟恢复，因此，心房结构改变是AF发生和维持的重要异常基质，但其分子机制和影响因素仍不明确。

The atrial structural remodeling contributed to contractile dysfunction , and prolonged the recovery of contractile function after cardioversion . So the atrial structural remodeling is an important substrate for occurrence and maintenance of AF , but its molecular mechanism and influential factor were unclear .