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Cardiovascular Health
Cardiovascular means anything of, relating to, or involving the heart and the blood vessels (arteries and veins) A healthy heart and circulatory system is vital to life. Ask questions here about how to keep the cardiovascular system pumping.
6,671 Questions
Where does the pulmonary circuit carry blood to?
The left and right pulmonary veins carry oxygenated blood back to the left atrium of the heart
What does it mean when you cough out blood clots?
Cause may be you were on birth controlling pills or sometimes it just happens. Or if you think that this is something that hasn't happened ever in your life and they are very huge then you may need to consult a doctor.
What are Cardiovascular systems response to steady state exercise?
Cardiovascular
Upon steady state exercise the cardiovascular system will react in several ways,
Heart Rate: Typically during exercise heart rate will increase. This is in order to increase blood flow to the working muscles to allow for increased respiration - in order for the muscles to work efficiently. Prior to exercise the regular resting heart rate is around 60 - 80bpm but when you exercise the heart rate will go up from that because it's an initial response to the exercise. After a few minutes the heart rate will stop rising and stay constant. This is because the athlete has been jogging for example, continuously and isn't psychically exerting himself. This is known as steady-state heart rate where the demands of the active tissues can be adequately met by the cardiovascular system. However, there is an exception to this
During prolonged steady-state exercise, particularly in a hot climate, a steady-state heart rate will gradually increase. This phenomenon is known as cardiac drift and is thought to occur due to increasing body temperature
Cardiac output: Cardiac output is the amount of blood pumped by the heart in 1 minute measured in L/min. It is a product of stroke volume and heart rate (SV x HR). If either hearts rate or stroke volume increase, or both, cardiac output increases also. Cardiac output increases proportionally with exercise intensity. With steady state exercise changes in either heart rate or stroke volume will have an impact on the other component. The Heart rate and the stroke volume stops rising and becomes constant and Cardiac output does the same
Blood Flow: As you exercise, the blood vessels in your muscles dilate and the blood flow is greater, just as more water flows through a fire hose than through a garden hose. Your body has an interesting way of making those vessels expand. As ATP gets used up in working muscle, the muscle produces several metabolic by products (such as adenosine, hydrogen ions and carbon dioxide). These by products leave the muscle cells and cause the capillaries (small, thin-walled blood vessels) within the muscle to expand or dilate (vasodilatation). The increased blood flow delivers more oxygenated blood to the working muscle.
Blood that would have gone to the stomach or the kidneys goes instead to the muscles, and the way that happens shows how the body's processes can sometimes override one another. As your muscles begin to work, the sympathetic nervous system, a part of the automatic or autonomic nervous system (that is, the brainstem and spinal cord) stimulates the nerves to the heart and blood vessels. This nervous stimulation causes those blood vessels (arteries and veins) to contract or constrict (vasoconstriction). This vasoconstriction reduces blood flow to tissues. Your muscles also get the command for vasoconstriction, but the metabolic by products produced within the muscle override this command and cause vasodilatation,
Stroke volume: Stroke volume is the amount of blood ejected per beat from left ventricle and measured in ml/beat. Stroke volume to its highest during sub maximal exercise and doesn't increase during maximal exercise. The greatest increase of stroke volume increases in the transition from rest to moderate exercise, during maximal exercise stroke volume doesn't go over its peak of 120 - 140 per minute Starling's law states that the stroke volume is limited towards the venous return, of which is the amount of the blood that is available to enter the left atrium and pass to the left ventricle
By Tom Clarke
How does viscosity affect peripheral resistance?
If you increase the total peripheral resistance then the arterial blood pressure will increase.
What does hyperthermia do to your body?
Hyperthermia raises your body core temperature. The difference between this and a fever is that a fever is caused by infection or disease, while hyperthermia is primarily caused by the environment.
Hyperthermia heats up the body therefore causing chemical particles to move faster (kinetic particle theory) which may speed up chemical reactions affecting the whole body's biochemistry.
How would you describe how a blood clot forms?
when one has a cut. more blood is pumped towards that area and with in that blood there clotting factors such as factor 8 and platelet's. At the site of the cut a thin mesh is formed by fibrinogen this traps platelets forming a cover called a clot this later turns into a scald
In the context of cardiovascular health, this is an ABDOMINAL AORTIC ANEURYSM. A link is provided to the Wikipedia article.
Is eating just one slice of cheddar cheese a day bad for health?
Like everything else in life, it's good if consumed with moderation. Cheese has a lot of calcium and other bacterial cultures that help your body in ways other foods can't, but one other thing : they have sometimes over 20% of fat in them! Which makes it worse than some fatty meats and some fast foods!!
Will make you fat very quickly if not taken moderately
Will low blood pressure make you dizzy?
For most people, no. But if you are not very active and hardly eat, you are likely to be dizzy sometimes.
How does anesthesia affects nervous system?
General anesthetic alters the flexibility of cell membranes, effectively blocking the ability of neurons to release neurotransmitters.
In English that means that your body does not send signals to the brains, so you cannot feel pain, see objects, etc.
What is the average resting heart rate for 11- and 12-year-olds?
What? Are you nuts? Dump this site for answers. You are in need of a pacemaker if your heartrate is 10-30 bpm.
Why do swimmers need cardiovascular endurance?
Carbs give you energy, and that's what most swimmers need to swim many laps.
What physical disabilities does Caesar have?
just epilepsy. He also was deaf in one ear, inability to have kids
One should partake in activities five times a week to improve their cardiovascular fitness. Just 30 minutes a day is all it takes.
Does the p wave in an ekg indicate atrial depolarization?
No it does not. Atrial repolarization is generally not visible on the telemetry strip because it happens at the same time as ventricular depolarization (QRS complex). The P wave represents atrial DEpolarization (and atrial systole). Atrial repolarization happens during atrial diastole (and ventricular systole).
What do you do if someone shows signals of heart attack?
- Call for ambulance or shout for help.
- Sit or lay him down and make sure he is comfortable.
- Loosen tight clothing around neck and/or waist.
- If he has medication, advise him to take it (for example GTN spray). Assist him if necessary.
- If he doens't have medication, give him 1 aspirin tabletwith water or ask him to slowly chew it.
- placing 2 or 3 fingers on his wrist (over the thumb) and apply gentle pressure until you feel a throbbing sensation...this is the pulse.
- While looking at clock or watch, count each beat that you feel for 1 minute (or for 30 seconds multiplied by 2).
- Take note of pulse rate for ambulance crew.
- Record pulse rate. Do this by:
- Record breathing rate. Do this by placing your hand on his chest and count each breath (inhale and exhale) for 1 minute and record for ambulance crew. It is advisable to attempt this at the same time as the pulse assessment. Do not tell him what you are checking as you may get incorrect reading.
- Continue to monitor until help arrives. Do NOTleave patient.
NB. BE PREPARED TO RESUSCITATE!
There is a large demand for EKG technicians. As the population continues to age, there will be need for more people to fill these positions.
