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Cardiopulmonary Anatomy & Physiolo...

7th Edition
Des Jardins + 1 other
ISBN: 9781337794909

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Chapter
Section
BuyFindarrow_forward

Cardiopulmonary Anatomy & Physiolo...

7th Edition
Des Jardins + 1 other
ISBN: 9781337794909
Textbook Problem

With advancing age, the

1. Blood pressure increases

2. Stroke volume decreases

3. Cardiac output increases

4. Heart work decreases

A. 1 only

B. 2 only

C. 3 and 4 only

D. 1, 2, and 4 only

Summary Introduction

Introduction:

As a person ages, the functions of the body deteriorate, including the functioning of the cardiovascular system in an individual. A number of different adverse changes or effects occur in the cardiovascular system with the progression of age. The reason for death in the elderly is generally found to be the problems of heart.

Explanation

Justification for the correct answer:

Option (D) states that with advancing age, the blood pressure increases, stroke volume decreases and heart work decreases (Options 1, 2 and 4 only). This is a true statement, as with age, the blood pressure increases due to the enlargement of the arteries and increasing total peripheral resistance. Factor such as obesity, sodium intake and stress may also cause elevated blood pressure.

Stroke volume, which is the volume of blood pumped from the left ventricle every beat, decreases with old age. The reasons could be poor contractility or decreased cardiac compliance. The heart work also decreases with increasing age. The decrease is approximately 1 % every year. Hence, option (D) is correct.

Justification for the incorrect answers:

Option (A) states that (1 only) with advancing age, the blood pressure increases...

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