Heart Disease
What Is Atherosclerosis?
hardening of the arteries
The size of your heart is comparable to what?
A fist
Arteries are blood vessels that:
carry blood away from the heart
What is coronary artery disease?
Damage or disease in the heart's major blood vessels.
*The usual cause is the buildup of plaque.
3 main parts of the Cardiovascular System
Blood
Blood Vessels
Heart
Vascular resistance is determined by:
dividing pressure gradient by volume flow
Explain cardiac arrest.
when the heart stops beating suddenly. The lack of blood flow to the brain and other organs can cause a person to lose consciousness, become disabled or die if not treated immediately.
What are Capillaries?
Tiny vessels that branch off from arteries.
Within the circulation, where is blood pressure highest?
Blood pressure is highest as its leaves the heart through the aorta
What is Congestive heart failure?
An abnormality in the heart that develops before birth.
List the layers of the heart.
Epicardium - the outer layer.
Myocardium - the middle, muscular layer.
Endocardium - the inner layer.
The cardiac output is determined by:
product of heart rate (HR) and stroke volume (SV)
What is an Arrhythmia?
Improper beating of the heart, whether irregular, too fast, or too slow.
How many chambers of the heart are there?
Four
These cells are known as the primary pacemakers of the heart:
The sinoatrial node (SA node)