In this episode, we discuss some basics of cardiovascular anatomy, physiology, disease states, testing and treatment. This is meant to provide basic information that will help in discussing cardiovascular health with your physician or your family.
Anatomy and physiology. (Remember this is basic)
The heart is a muscular organ that is the pump of the circulatory system. Blood comes into the heart from the lungs where it is resupplied with oxygen that is needed by all of our cells. The blood then goes back to the heart where this freshly oxygenated blood is pumped to the rest of the body.
Arteries are the blood vessels that carry the fresh blood to the body and veins are the blood vessels that carry the blood that is now out of oxygen back to the heart.
The heart, just like the other organs of the body, needs fresh blood to maintain health and function. The first arteries that leave the heart are called coronary arteries and these supply fresh oxygenated blood to the heart.
Disease states (there are many others, remember this is very basic)
When arteries of the circulatory system become diseased (narrowed and blocked due to plaque build up) the organs that are fed by these arteries suffer from poor circulation and are unable to function normally.
Coronary artery disease (CAD), also called heart disease occurs when the coronary arteries become narrowed or blocked by plaque buildup. This leads to chest pain with activity, myocardial infarction (heart attack), and heart failure.
Cerebrovascular disease is this process in the brain and leads to strokes.
Peripheral arterial disease (PAD) is the same process in the legs and leads to pain with activity that improves with rest, poor wound healing, and amputations.
Heart failure occurs when the heart cannot pump enough blood to keep up with the needs of the body.
Testing
EKG or ECG- electrocardiogram. This is a test and measure of electrical activity as it goes through the heart. It gives information about heart rate, heart rhythm, heart size, and blood supply.
ECHO- echocardiogram. This is an ultrasound of the heart. It uses sound waves to evaluate how well the heart pumps and how well the valves work. It can also give indirect information about the pressures in the heart.
Heart cath. This test is used to evaluate the blood supply to the heart, how well the heart is pumping and can measure the pressures in the heart. A catheter is placed in an artery in the groin and is threaded up to the heart. When in the right place, dye is injected and xrays are used to take images.
Treatments
Angioplasty or stent placement.
This is used to treat coronary arteries that have decreased blood supply. Angioplasty is used to stretch area of narrowing and a stent is used to permanently open it. This is done through the heart cath procedure.
Coronary artery bypass graft surgery, also called CABG. When a blockage of a coronary is too severe or there are multiple arteries affected a bypass surgery is performed. This is done by using blood vessels that are harvested from a different part of the body (usually the leg) and then surgically placing that piece of vessel above and below the blockage to go around or bypass it.
Heart transplant. This is done to treat severe heart failure.