{"title":"Cardiac Cycle","authors":"","doi":"10.1017/9781108565011.031","DOIUrl":null,"url":null,"abstract":"• Every single beat of the heart involves three major stages: cardiac diastole, when chambers are relaxed and filling passively; atrial systole when the atria contract leading to ventricular filling; and ventricular systole when blood is ejected into both the pulmonary artery and aorta. • Pulse is a way of measuring heartbeat, based on the arterial distensions or pulses that occur as blood is pushed through the arteries. • Resting heart rate typically ranges from 60 to 100 bpm (beats per minute). Athletes often have significantly lower than average heart rates while the sedentary and obese typically have elevated heart rates. • Systolic blood pressure is the pressure during heart contraction, while diastolic blood pressure is the pressure during heart relaxation. • The normal range for blood pressure is between 90/60 mmHg and 120/80 mmHg.","PeriodicalId":196989,"journal":{"name":"Basic Physiology for Anaesthetists","volume":"31 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2019-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Basic Physiology for Anaesthetists","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1017/9781108565011.031","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
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Abstract

• Every single beat of the heart involves three major stages: cardiac diastole, when chambers are relaxed and filling passively; atrial systole when the atria contract leading to ventricular filling; and ventricular systole when blood is ejected into both the pulmonary artery and aorta. • Pulse is a way of measuring heartbeat, based on the arterial distensions or pulses that occur as blood is pushed through the arteries. • Resting heart rate typically ranges from 60 to 100 bpm (beats per minute). Athletes often have significantly lower than average heart rates while the sedentary and obese typically have elevated heart rates. • Systolic blood pressure is the pressure during heart contraction, while diastolic blood pressure is the pressure during heart relaxation. • The normal range for blood pressure is between 90/60 mmHg and 120/80 mmHg.
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心动周期
•心脏的每一次跳动包括三个主要阶段:心脏舒张期,此时心室放松并被动充盈;心房收缩是指心房收缩导致心室充盈;当血液同时射入肺动脉和主动脉时心室收缩。•脉搏是一种测量心跳的方法,基于血液通过动脉时发生的动脉扩张或脉冲。•静息心率通常在每分钟60到100次之间。运动员的心率通常明显低于平均水平,而久坐和肥胖的人心率通常会升高。•收缩压是心脏收缩时的压力,而舒张压是心脏放松时的压力。•血压的正常范围在90/60毫米汞柱和120/80毫米汞柱之间。
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