What is cardiac output and Factors affecting cardiac output ?

This video explains about Factors affecting cardiac output Cardiac output depends on mainly stroke volume and heart rate Stroke volume depends on Preload (depends on venous return) Force of contraction (Sympathetic increases) Afterload (peripheral resistance)inversely related to cardiac output Increased venous return increases End diastolic volume which increases preload which increases stroke volume Increased Heart rate increases cardiac output Sympathetic increases heart rate Two types of regulation of cardiac output Heterometric regulation(depends on initial length of muscle fibre) Preload and afterload are examples of heterometric regulation Homometric regulation(independent of initial length of muscle fibre) Force of contraction is example of homometric #drsenphysiology #physiologylectures #medicalstdents #physiologypracticals #mbbsstudent #cardiacoutput#cardiaccycle