Chapter 19 Flashcards
Heart
Four-chambered pump that is responsible for the flow of blood in the body
Atria
The upper two chambers of the heart
Ventricles
The lower two chambers of the heart
Systole
Phase where the heart is at work, contracting and pushing blood out of the left ventricle
Diastole
Phase when the heart muscle relaxes
Artery
Vessel that carries blood to the heart
Points about the circulatory system
Made up of heart, blood vessels, and blood
White blood cells protect the body from bacteria, viruses, and other foreign substances
Plasma, the liquid portion of the blood, carries nutrients, waste products, hormones, salts, antibodies, and the substance necessary for the blood to clot
What is the function of the heart?
Pumps blood through blood vessels to every cell in the body
Functions of the blood
Transport oxygen, nutrients, hormones, salts, and antibodies to cells
Removes carbon dioxide and other waste products from the cells
Controls pH level and body temperature
Clots and fights pathogens and poisons
Normal changes of aging in the circulatory system
Heart pumps less efficiently
Blood vessels narrow and become less efficient
Blood vessels become less elastic
Blood flow decreases
Occlusion
A complete obstruction of a blood vessel
Ischemia
A lack of blood supply to an area
Points about hypertension
Causes: hardening and narrowing of blood vessels, kidney disease, adrenal tumors, pregnancy, stress, pain, or medication
Prehypertension means that a person does not have hypertension now, but it is likely to in the future
Can lead to MI, CVA, kidney disease, or blindness
Treatment: medication, including diuretics; exercise program; diet; stopping smoking; lowering stress levels
Coronary artery disease
A condition in which the coronary arteries become damaged and narrow over time, causing chest pain and other symptoms
Myocardial ischemia
A condition in which the heart muscle does not receive enough blood and lacks oxygen; can cause angina pectoris
Angina pectoris
Chest pain, pressure, discomfort
Stable angina
Chest pain that occurs when a person is active or under severe stress
Unstable angina
Chest pain that occurs while a person is at rest and not exerting himself
Nitroglycerin
Medication that relaxes the walls of the coronary arteries
Points to remember about coronary artery disease
Cause: vessels in coronary arteries narrow after build-up of arterial plaque, reducing blood to the heart
Symptom: angina pectoris
Care guideline for angina
Reduce stress
Notify the nurse immediately if the resident needs help taking his prescribed medication
Make sure resident gets enough rest
Resident should avoid big meals
Encourage resident to follow exercise plan
Resident may need to avoid hot, humid weather
Encourage residents who are quitting smoking
Cardiomyopathy
A weakening of the heart muscle due to enlargement or thickening, which reduces the heart’s ability to pump blood effectively
Points about cardiomyopathy
Causes: extensive CAD, heart muscle that no longer pumps effectively, virus, diabetes, thyroid problems, drug and alcohol use, birth defect, or unknown cause
Most common reason for heart transplants
Points about myocardial infarctions
Cause: block of blood flow to heart muscle