Answered: There are three major factors that…

Phlebotomy Essentials

6th Edition

ISBN:9781451194524

Author:Ruth McCall, Cathee M. Tankersley MT(ASCP)

Publisher:Ruth McCall, Cathee M. Tankersley MT(ASCP)

Chapter1: Phlebotomy: Past And Present And The Healthcare Setting

Section: Chapter Questions

Problem 1SRQ

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Question

There are three major factors that affect stroke volume and therefore affect cardiac output: afterload, preload, and contractility. Select two of these factors and explain how and why each affects cardiac output.

Expert Solution

Introduction

Cardiac output is a phenomenon in cardiovascular physiology that is characterized by the rate of blood pumped by the heart into the circulatory system per minute.

Cardiac output (CV) is equal to the product of the stroke volume (SV) and the heart rate (HR). It is mathematically expressed as $C V = S V \times H R$ .

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