More about cardiac cycle ◆心房收缩在先,心室收缩在后 左右两侧心房或心室同步活动。 ◆舒张期比收缩期持续时间长 ◆心率加快时,心动周期缩短,以舒张期缩短 更明显。心肌细胞工作时间相对延长
◆ 心房收缩在先，心室收缩在后。 ◆ 左右两侧心房或心室同步活动。 ◆ 舒张期比收缩期持续时间长。 ◆ 心率加快时，心动周期缩短，以舒张期缩短 更明显。心肌细胞工作时间相对延长。 • More about cardiac cycle
化宠舒张期 主动脉瓣 肺动脉瓣 三头 心收缩期 应房收缩期 脏的泵血 脉瓣 动脉 房变 房宏瓣 动周期
二心脏的泵血过程
Stroke yol each ventr beat in the
心动周期分期 压力100 主动脉压 (mmHg) 一)心房收缩期1 左室压 (atrial systole) (二)心室收缩期 (ventricular systole) 左房压 1.等容收缩期2 主动脉 (isovolumic contraction phase) 血流 (L/m in) 2.快速射血期3 (rapid ejection phase) 心室38 3.减慢射血期4 容积 (m1) (reduced ejection phase 26 (三)心室舒张期 (ventricular diastole) 心音 1.等容舒张期5 腔静脉 (isovolumic relaxation phase) 脉搏 2.快速充盈期6 (rapid filling phase 心电图 3.减慢充盈期7 收缩期 00.10.2030.40.5060.7O8 (reduced ejection phase) 时间<s
（一）心房收缩期 1 (atrial systole) （二）心室收缩期 (ventricular systole) 1.等容收缩期 2 (isovolumic contraction phase) 2.快速射血期 3 (rapid ejection phase) 3.减慢射血期 4 (reduced ejection phase) （三）心室舒张期 (ventricular diastole) 1.等容舒张期 5 (isovolumic relaxation phase) 2.快速充盈期 6 (rapid filling phase) 3.减慢充盈期 7 (reduced ejection phase) 心动周期分期
STAR Late diastole-both sets of chambers relaxed. Passive ventricular filling Isovolumic ventricular Atrial systole relaxation-as ventricles relax atrial contraction ford pressure in ventricles drops, a small amount of rces blood flows back into cups of additional blood into semilunar valves and ventricles snaps them closed EDV E end-diastolic volume Esv= end-systolic volume Atrial diastole The maximum amount of blood or minimum amount of blood ntricular systole in ventricles occurs at the end of in ventricles. ESV=65 mL ventricular relaxation EDV=135 mL. Ventricular ejection as ventricular pressure rises and exceeds pressure Isovolumic ventricular in the arteries, the semilunar contraction-first phase valves open and blood is ejected of ventricular contraction pushes Av valves closed but does not create enough pressure to open semilunar valves