Chapter 14 Flashcards
The leading cause of death for men and women in the US. Accounts for one in every three deaths. The death rate from CVD for men has decreased over the past 30 years due to lifestyle changes, improved recognition and treatment of risk factors, and improved treatment of disease, the drop in death rates for women has really just begun. This includes: heart attack, stroke, peripheral artery disease, congestive heart failure, and other conditions.
Cardiovascular disease (CVD)
A network of blood vessels (arteries, veins, and capillaries) and a pump (the heart) that circulate blood throughout the body. The heart is a fist-sized muscle with four chambers: the right and left atria and the right and left ventricles, separated by valves.
cardiovascular system
Regulates pulmonary (lung) circulation, pumping oxygen-poor blood to the lungs and oxygen-rich blood back to the heart.
right side of heart
Regulates systemic (body) circulation, pumping oxygen rich blood to the rest of the body and returning oxygen-poor blood to the heart.
left side of heart
Needs oxygen and nutrients provided by blood. The blood being pumped through this does not provide nourishment for this muscle itself.
heart
Two medium-sized arteries, supply blood to the heart muscle. When a blood vessel is narrowed, the section of the muscles it supplies does not get enough blood.
coronary atreries
Largest artery in the body; it leaves the heart and branches into smaller arteries, arterioles, and capillaries carrying oxygen-rich blood to body tissues.
aorta
The contraction and relaxation of the ventricles is what we feel and hear as this.
heartbeat
Contraction phase of the heart and represented in the upper number of blood pressure measurement.
systole
Relaxation phase of the heart and represented in the lower number in a blood pressure measurement.
diastole
group of cells in the right atrium where he electrical signal is generated that establishes the heartbeat.
SA node
Healthy arteries are strong and flexible. Arteries can harden and become stiff in a process referred to as this. It is a thickening and hardening of the arteries due to the buildup of fats, cholesterol, cellular waste products, calcium, and other substances in artery walls. It is an underlying disease process in many forms of CVD which causes damage to the blood vessels. Takes years to develop and starts at a young age. Autopsies of people aged 15-35 who died from unrelated trauma show that some young people already have the beginnings of this. Heart attacks, strokes, and peripheral vascular disease are all caused by narrowing of arteries from this.
Atherosclerosis
With white blood cells, smooth muscle cells release collagen and other proteins to form this. It is an accumulation of debris, causes the artery wall to enlarge and bulge, slowing the blood flow. This can break off and completely block the artery.
Plaque
Atherosclerosis may weaken an artery wall, causing a stretching of the artery known as this. This can rupture, tear, and bleed causing sudden death.
Aneurysm
This is often a heart attack are the result of atherosclerosis involving a coronary artery.
coronary heart disease (CHD)
What is the leading form of CVD?
Coronary heart disease (CHD)
Narrowing or blocking of a coronary artery keeps the heart from getting enough oxygen-rich blood called this.
ischemia
If the artery is completely blocked, the person has heart attack o this.
myocardial infarction (MI)
During this he area of the muscle supplied but the blocked coronary artery is completely deprived of oxygen. If blood flow is not quickly restored, that part of the heart muscle will die. The severity of this is determined by the location and the duration of the blockage. If the blockage occurs too close to the aorta where the coronary arteries are just starting to branch, a large area of heart muscle is deprived of oxygen. If the blockage is farther out in a smaller coronary artery, the area of muscle supplied is smaller. The duration of the blockage is usually determined by the time between onset of symptoms and initiation of medical or surgical treatment to reopen the artery. This can occur when the heart is stressed by extra work like exercise, emotional stress, or even light activity or even at rest. Symptoms could be chest pain, pain in back, shoulders, or arms, pressure, sensation of fullness, or squeezing in the chest.
Heart Attack
Approximately 37% of women and 27% of men in large studies did not have chest pain or discomfort with their heart attack. What is the cause for this sex difference?
- women have their first heart attack older than men
- absence of chest pain is more common with heart disease at older ages
- there aren’t varied symptoms between men and women
When coronary arteries are narrowed but not completely blocked. It’s pain, pressure, heaviness, or tightness in the center of the chest that may radiate to the neck, arms, or shoulders. Half of heart attacks are preceded by this. The pain of this resolves whereas the pain of a heart attack continues.
angina
Conditions that can cause pain in the chest are irritated esophagus, arthritis, gas, stomach ulcers, gallbladder disease, chest pain from working out. Experiencing this pain can lead some people to ignore chest pain from what?
heart attack
The pumping of the heart is usually a well-coordinated event, controlled by an electrical circuit establishing a rate of 60-100 beats per minute for a normal adult heart. If the signal is disrupted, it can cause this which is the disorganized beating of the heart. This disorganized beating is not as effective at pumping blood. It is any type of irregular heartbeat. It may be an occasional skipped beat, a rapid or slow rate, or an irregular pattern. Most people have an occasional irregular heartbeat every day. Some don’t even notice it. Irregular beats may cause noticeable symptoms like palpitations, a sensation of fluttering in the chest, chest pain, light-headedness, shortness of breath, and fatigue.
Arrhythmias
An abrupt loss of heart function. Usually within an hour of symptom onset. The sudden loss of function can be due to external causes (such as trauma, drowning, electrocution, or drug overdose) but is most often due to malfunction in the hearts electrical system due to atherosclerosis or heart abnormality.
Sudden cardiac arrest
Is a particular type of arrhythmia in which the ventricles contract rapidly and erratically, causing the heart to quiver or tremor rather than beat. When the ventricles fibrillate, blood can’t be pumped by the heart. The result is sudden cardiac death, an abrupt loss of heart function. Can be reversed with an electrical shock from a defibrillator, which can restart the heart’s normal rhythm.
Ventricular fibrillation (VF)
What is the leading cause of death in high school and college athletes?
Ventricular fibrillation (VF)
When blood flow to the brain or part of the brain is blocked. The result is this and also known as a cerebrovascular accident (CVA). Third leading cause of death in the US after heart disease and cancer. Can be preventable and treatable.
Stroke
What is the leading cause of sever, long-term disability?
Stroke or CVA
Make up 87% of all strokes and occur when an artery in the brain becomes blocked in the same way that a heart attack occurs when a coronary artery is blocked and prevents the brain from receiving blood flow.
Ischemic strokes
Blockage that causes strokes can be due to this. A blood clot that develops in a narrowed artery.
thrombus
A clot that develops elsewhere, often in the heart, travels to the brain and lodges in an artery.
embolism
Occur when a brain artery ruptures, bleeds into the surrounding area, and compresses brain tissue. These may include a head injury or a ruptured aneurysm. Symptoms depend on the part of the brain involved but usually involve sudden onset of neurological problems such as headaches, numbness, weakness, or speech problems.
Hemorrhagic strokes
Stroke that account for 10% of all strokes and occur when the ruptured artery is within brain tissue.
Intracerebral hemorrhagic stroke
Account for remaining 3% of all strokes and occur when the ruptured artery is on the brain’s surface and blood accumulates between the brain and the skull.
Subarachnoid hemorrhagic stroke
Called ministrokes. Occurs before having a stroke. These are periods of ischemia or restricted blood supply that produce some symptoms of stroke but resolve within 24 hours with little or no tissue death. Isn’t taken seriously but should be viewed as a warning sign of a stroke. After this, people can have a stroke within 90 days.
transient ischemic attacks (TIA)
Pressure exerted by blood against walls of arteries. It is measured in millimeters of mercury and stated in two numbers. The upper number is systolic pressure, the pressure produced when the heart contracts. The lower number is diastolic pressure, the pressure in the arteries when the heart is relaxed between contractions. Constantly changing as more attention is being paid to pre-hypertension.
Blood pressure
High blood pressure of this occurs when the pressure is great enough to damage artery walls. A silent killer because it usually causes no symptoms. Untreated high blood pressure can weaken and scar the arteries and makes the heart work harder, weakening it, as well. Can cause heart attacks, strokes, kidney disease, peripheral artery disease, and blindness.
Hypertension (HTN)
Higher blood pressure than recommended but not meeting the requirements of hypertension. Americans aged 20 or older have pre-hypertension.
Pre-hypertension
Factors that can cause Hypertension:
- Age
- Genetics
- High salt consumption
- alcohol
- not physically active
- obesity
What group has the highest rates of HTN?
Black people