Each heartbeat can be broken into systole and diastole.

每次心跳都可被分解为收和舒张。

Cotton was the heartbeat of the section, the planting and the picking were the diastole and systole of the red earth.

棉花便是本地区的脉搏，植棉和摘棉便是这红土心脏的舒张和收。

The time interval between S1 and S2 is when the ventricles contract, called systole.

S1和S2的时间间隔是心室收的时候，称为收。

There are two phases of the heartbeat: diastole (relaxation) and systole (contraction).

这种舒张-收心动周（舒张充，收射血）持续约0。9秒，每分钟心脏博动70－80次。

Finally, Marfan syndrome is a risk factor for mitral valve prolapse, where the mitral valve pouches into the left atrium during systole.

最，马方综合征也是二尖脱垂的一个危险因素，即二尖在收时突向左心房。

It's interesting to note that systole is shorter than diastole.

注意，收舒张短。

Therefore, right after ventricular systole occurs, the pressure is passed along and rises in these arteries.

因此，在心室收发生，压力在这些动脉中传递并上升。

The other phase of the cardiac cycle is called systole.

心脏周的另一个阶段称为收。

You can recall this term by remembering that systole is the term used to describe contraction of the ventricles.

您可以通过记住收是用来描述心室收的术语来回想起这个术语。

S1, caused by the atrioventricular valves closing, at the beginning of systole, and S2, caused by the aortic and pulmonary valves closing, at the beginning of diastole.

S1是由于房室的关闭导致的，发生在收早；S2是由于主动脉和肺动脉的关闭导致的，发生在舒张早。

The blood flow starts small, rises to a maximum in mid-systole at the peak of ventricular contraction, then attenuates toward the end of systole.

血流一开始很小，在收中，即心室收的最高峰，达到最大值，逐渐减弱直到收结束。

At this point, the ventricles are under very high pressure, and now we move into the next phase of the cardiac cycle, called systole.

此时，心室处于非常高的压力下，现在我们进入心动周的下一个阶段，称为收。

Right after the S1 sound, the aortic and pulmonic valve open up allowing blood to get pushed out to the body and this period of time is called systole.

在S1之，主动脉和肺动脉打开，分别使得血液流入身体各组织以及肺部，这段时叫做心脏收。

This pressure varies over the course of the cardiac cycle, increasing when blood is ejected from the heart(during systole), and decreasing as the heart relaxes(during diastole).

因血管内压力变化与心脏状况、动脉以及其它因素有关，测量血压并对其认真解读能指导护理和帮助评估一个人的健康状况。

And they do that because your ventricles contract to build up pressure and pump blood out of the heart. This high pressure caused by ventricular contraction is called systole.

它们这样做是因为你的心室收以增加压力并将血液泵出心脏。这种由心室收引起的高压称为心脏收。

Examples of conditions associated with common systolic murmurs include: mitral valve regurgitation, when the mitral valve does not close properly and blood surges back to the left atrium during systole.

二尖反流，当二尖关闭不全时，血液在收反流至左心房。

This can happen in two ways, either the heart's ventricles can't pump blood hard enough during systole, called systolic heart failure, or not enough blood fills the ventricles during diastole, called diastolic heart failure.

这可能以两种方式发生：一种是心室在心脏收不能足够有力地泵出血液，即收性心力衰竭；另一种是在心脏舒张心室充不足，即舒张性心力衰竭。

Blood pressure is defined as the pressure exerted by the blood against the walls of the blood vessels, and it's at its lowest point during diastole and reaches a peak at systole.

血压定义为血液对血管壁施加的压力，在舒张处于最低点，在收达到峰值。

The second heart sound, " dub" , is called S2, and the noise comes from the aortic and pulmonic valves snapping shut to prevent blood from flowing backwards after it leaves the ventricles, effectively ending systole.

第二心音“dub”，它被称为S2，声音来自主动脉和肺动脉关闭，以防止血液在离开心室反流，有效地结束心脏收。

Usually, this situation is asymptomatic, and patients can have what's known as a continuous murmur, also known as Gibson's murmur, from blood moving from the aorta to the pulmonary artery, continuous because it's heard during systole and diastole.

通常，这种情况是无症状的，而患者可能会有连续性杂音，也称为吉布逊杂音，血液从主动脉流入肺动脉；连续是因为在整个收和舒张都能听到。