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Chapter-08 Cardiac Output

BOOK TITLE: Handouts on Cardiovascular System

Author
1. Nageswari K Sri
ISBN
9788184480733
DOI
10.5005/jp/books/10350_8
Edition
1/e
Publishing Year
2007
Pages
11
Author Affiliations
1. Government Medical College, Chandigarh, Government Medical College, Chandigarh, India
Chapter keywords

Abstract

This chapter gives definitions and equations for Cardiac output, Stroke volume, Cardiac index, End-diastolic volume, End-diastolic pressure and End- systolic volume. The normal variations of cardiac output, the cellular mechanics and the primary and secondary regulation are discussed. In the primary regulation, the factors operating through Frank-Starling mechanism of heart, due to changes in initial length of myocardium, i.e. preload, known as Heterometric regulation, factors operating through contractility of the heart, known as Homometric regulation and the factors affecting heart rate are shown as block diagrams. The primary regulation also includes the Force-velocity relationship, an inverse relationship between aortic pressure/total peripheral resistance, i.e. afterload and the cardiac output, demonstrated through Heart lung preparation. The factors affecting Starling\'s curves, Cardiac output curves, Venous return curves, Hyper effective and Hypo effective heart, and the Methods of measuring cardiac output are highlighted.

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