心输出量从心脏出来的血液量称为心输出量。如果心脏的收缩力大,压出的血液量就多,而其血压也高,反之,收缩力小,压出的血液量少,血压就随之减低。然而,事实上心脏是尽全力在做收缩、舒张的活动。所以,正常情况下不可能因为心脏的力量过强而导致发生血压过高的现象。不过,要是心脏的力量减弱,倒是会发生血压降低的现象。 Cardiac output from the heart out of the blood volume is called cardiac output. If the heart’s contractility, out of the amount of blood on the more, and its high blood pressure, on the contrary, contractility is small, the amount of blood pressure out less, blood pressure will be reduced. However, in fact the heart is doing its best to do contraction and relaxation activities. Therefore, under normal circumstances it is impossible because of the strength of the heart caused by excessive blood pressure phenomenon. However, if the heart’s power is weakened, it may happen that the blood pressure is reduced.