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Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332

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BuyFindarrow_forward

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332
Textbook Problem
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Risks of Hypertension Eleni Rapsomaniki and her colleagues analyzed medical records of 1.25 million people in the United Kingdom to see how hypertension affects the risk of cardiovascular disorders. They looked at records of people who at 30 years old had no history of heart disease or stroke, although some had high blood pressure. By looking at which of these people later had a heart attack or stroke, the researchers were able to estimate the lifetime risks of these disorders in people with, and without high blood pressure. FIGURE 36.19 shows the researchers’ estimates of the lifetime risk for heart attack and for transient ischemic attack (TIA), a type of stroke.

Chapter 36, Problem 2DAA, Risks of Hypertension Eleni Rapsomaniki and her colleagues analyzed medical records of 1.25 million

FIGURE 36.19 Lifetime risks of heart attack and TIA (a type of stroke), with and without hypertension at age 30. A transient ischaemic attack (TIA), sometimes called a mini-stroke, is caused by a temporary blockage of a blood vessel that supplies blood to the brain.

What is the risk that someone without hypertension at age 30 will have a heart attack by age 75? What is the comparable risk for someone with hypertension at age 30?

Summary Introduction

To find: The risk that someone without hypertension at age 30 will develop a heart attack by age 75.

Concept introduction: The normal blood pressure range is 120/80 mmHg where the top number represents systolic and the bottom one represents diastolic pressure.

High blood pressure or hypertension is the high force exerted by the blood against the walls of blood vessels. It can lead to many severe complications and increase the risk of stroke, atherosclerosis, heart diseases, and death. There are many risk factors for having hypertension. Age, body weight, sex, food habits, alcoholism, drug addiction and physical inactivity are some of the major causes for the condition.

Explanation

The risk that someone without hypertension at age 30 will develop a heart attack by age 75 is about 4.5 percent. The graphical representation implies to the fact that all have a chance to develop a cardiac arrest once in their lifetime though they have not experienced it in their 30s. There are several factors that contribute to the risk to develop a heart attack...

Summary Introduction

To find: The comparable risk for someone with and without hypertension at age 30.

Concept introduction: High blood pressure or hypertension is the high force exerted by the blood against the walls of blood vessels. It can lead to many severe complications and increase the risk of stroke, atherosclerosis, heart diseases, and death. There are many risk factors for having hypertension. Age, body weight, sex, food habits, alcoholism, drug addiction and physical inactivity are some of the major causes for the condition.

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