contractility

简明释义

英[ˌkɒntrækˈtɪlɪti]美[kəntrækˈtɪləti]

n. 收缩性，伸缩力；缩小性

英英释义

单词用法

同义词

反义词

例句

1.It has marked effects of increasing heart contractility.

并具有加强心肌收缩力的作用。

2.Theophylline is administered to patients with bronchial asthma for its effects of bronchodilation and improved contractility of the diaphragm.

茶碱用于支气管哮喘病人，是基于它的支气管扩张效应以及对膈的收缩力的改善。

3.Cardiac muscle contractility and enzyme were examined.

记录心功能，测量心肌酶活性。

4.To observe the effect of Shenmai injection on the heart beat, myocardial contractility, blood flow of coronary artery of isolated guinea-pig hearts.

观察参麦注射液对离体豚鼠心脏的心率、心肌收缩力、冠脉流量的影响。

5.Objective: Explore the value of phonocardiogram exercise test (PCGET) to evaluating cardiac contractility.

目的：探讨心音图运动试验（PCGET）评估心肌收缩力及心力储备的价值。

6.Aim: To investigate the effects of injecting plasmid DNA into toad skeletal muscle on its contractility.

目的：应用蟾蜍坐骨神经腓肠肌标本，观察肌内注射质粒DNA后不同时间对肌肉收缩功能的影响。

7.Medications can enhance the contractility 收缩能力 of the heart in patients with heart failure.

药物可以增强心力衰竭患者的contractility 收缩能力。

8.The heart's contractility 收缩能力 is crucial for maintaining adequate blood flow.

心脏的contractility 收缩能力 对维持足够的血流至关重要。

9.The physician measured the contractility 收缩能力 of the left ventricle using echocardiography.

医生使用超声心动图测量了左心室的contractility 收缩能力。

10.Decreased contractility 收缩能力 often indicates underlying heart disease.

减少的contractility 收缩能力 通常表明潜在的心脏疾病。

11.An increase in contractility 收缩能力 can lead to a higher stroke volume.

增加的contractility 收缩能力 可以导致更高的搏出量。

作文

The human body is a complex system that relies on various physiological processes to maintain homeostasis and support life. One of the critical aspects of this system is the concept of contractility, which refers to the ability of muscle fibers to shorten and generate force. This property is particularly significant in cardiac muscles, as it directly influences the heart's ability to pump blood effectively throughout the body. Understanding contractility is essential not only for medical professionals but also for individuals interested in health and fitness. In the context of the heart, contractility plays a vital role in determining cardiac output, which is the volume of blood the heart pumps per minute. When the heart muscles contract with greater force, more blood is expelled from the ventricles, leading to increased cardiac output. This is crucial during physical activities when the body's demand for oxygen and nutrients rises. Factors such as exercise, stress, and hormonal changes can enhance contractility, allowing the heart to respond to the body's needs efficiently.On the other hand, decreased contractility can lead to serious health issues. Conditions such as heart failure or cardiomyopathy can impair the heart's ability to contract effectively, resulting in reduced blood flow to vital organs. This can cause symptoms like fatigue, shortness of breath, and fluid retention. Medical interventions often focus on improving contractility through medications, lifestyle changes, or surgical procedures to restore normal heart function.Beyond the heart, contractility is also relevant in skeletal muscles, where it contributes to movement and physical performance. Athletes, for instance, rely on the efficient contractility of their muscles to perform at high levels. Training regimens often aim to enhance muscle strength and endurance by improving the contractility of muscle fibers. Resistance training, for example, can lead to adaptations that increase the force of muscle contractions, benefiting both athletic performance and daily activities.Moreover, understanding contractility extends into the realm of pharmacology, where certain drugs are designed to influence this property. For instance, positive inotropic agents are medications that increase contractility, making them useful in treating heart failure. Conversely, negative inotropic agents can decrease contractility, which may be necessary in conditions where reducing the heart's workload is essential.In conclusion, contractility is a fundamental concept that underpins many aspects of human physiology, particularly concerning the heart and muscles. Its significance in health and disease highlights the importance of maintaining optimal contractility through healthy lifestyle choices, regular exercise, and appropriate medical care. By appreciating the role of contractility, individuals can better understand their bodies and make informed decisions about their health and well-being.

人体是一个复杂的系统，依赖于各种生理过程来维持内稳态和支持生命。这个系统的一个关键方面是“contractility”的概念，它指的是肌肉纤维缩短并产生力量的能力。这个特性在心脏肌肉中尤为重要，因为它直接影响心脏有效泵送血液到全身的能力。理解contractility对于医疗专业人员以及对健康和健身感兴趣的人来说至关重要。在心脏的背景下，contractility在决定心输出量方面发挥着至关重要的作用，心输出量是心脏每分钟泵送的血液量。当心脏肌肉以更大的力量收缩时，更多的血液从心室中排出，导致心输出量增加。这在身体活动期间尤其重要，因为身体对氧气和营养的需求上升。运动、压力和激素变化等因素可以增强contractility，使心脏能够有效地响应身体的需求。另一方面，contractility的降低可能导致严重的健康问题。心力衰竭或心肌病等疾病可能会损害心脏有效收缩的能力，从而导致重要器官的血流减少。这可能会引起疲劳、呼吸急促和液体潴留等症状。医学干预通常侧重于通过药物、生活方式改变或外科手术来改善contractility，以恢复正常的心脏功能。除了心脏，contractility在骨骼肌中也相关，它有助于运动和身体表现。例如，运动员依赖肌肉的有效contractility来达到高水平的表现。训练计划通常旨在通过改善肌肉纤维的contractility来增强肌肉力量和耐力。例如，抗阻训练可以导致适应性变化，增加肌肉收缩的力量，从而使运动表现和日常活动受益。此外，理解contractility还延伸到药理学领域，其中某些药物旨在影响这一特性。例如，正性肌力药物是一种增加contractility的药物，因此在治疗心力衰竭时非常有用。相反，负性肌力药物可以降低contractility，这在减少心脏负担的情况下可能是必要的。总之，contractility是一个基本概念，支撑着人类生理的许多方面，特别是与心脏和肌肉有关。它在健康和疾病中的重要性突显了通过健康的生活方式选择、定期锻炼和适当的医疗护理来维持最佳contractility的重要性。通过欣赏contractility的作用，个人可以更好地理解自己的身体，并就健康和福祉做出明智的决策。