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Some reasons could be
* Age * High Cholesterol in blood * Blockages in the blood vessels * Heart diseases
* etc..
What else can I help you with?
What would happen to cardiac output if the stroke volume increased and the heart rate stayed the same?
Since the stroke volume increased then the cardiac out put would increase, pumping out more blood with the same amount of heart beats.
How does slow tempo music effect a persons heart rate?
Slow tempo will decrease your heart rate because it might put you to sleep and that would rest your heart rate.
What would cause a man to hemorrhage out of his mouth after a heart attack?
It could possibly be caused by blood backing up in the lungs from the heart not pumping properly (Congestive Heart failure). the blood could be actually coming from the lungs and being coughed up
Vessels carrying blood to the heart?
There are 2 or 3 methods for blood to return to the heart. The first method is by pressure. Enough pressure is generated in the heart to push the blood through the arteries, arterioles, capillaries, venules, veins, and back into the heart. The right side of the heart only pumps blood into the lungs and back to the heart and requires less pressure than the left side that pumps to the rest of the body, although the volume must be identical for the two halves. The second method is a pumping method by muscle contraction. This is especially true of the calf muscles in the leg pumping the blood back to the heart. A third method would be gravity for anything above the heart, including the head, or any limb that was elevated. Elevation can be used to decrease pressure and help reduce swelling.
Does the parasympathetic nervous system increase or decrease heart rate?
Both the parasympathetic and sympathetic nervous systems innervate the heart. The parasympathetic nervous system functions in regulating heart rate through the vagus nerve, with increased vagal activity producing a slowing of heart reate. The sympathetic nervous system has an excitatory influence on heart rate and contractlitiy, and it serves as the final common pathway for controlling the smooth muscle tone of the blood vessels. Reference: Porth, C M (2007) Pathophysiology Concepts of Altered Health States, 2nd Ed. (p. 344) Lipponcott Williams & Wilkins, Philadelphia
What does contraction of veins do to the venous system?
Contraction of veins would increase venous return to the right atrium. It would increase the efficiency of the heart pumping.
What would happen if blood started flowing backward through a valve?
If blood starts flowing backwards through a valve, stroke volume and ejection fraction would decrease. The heart's pumping action would be less efficient.
How much blood would the heart pump in a week?
it always pumping all the time when your:sleepingplayingeatingwatchingdancingreadingit always pumping
What would happen to the human body without the heart?
Without a heart pumping blood throughout the body, a person would die.
What would you do with out a heart?
You would die becauese it would stop your blood from pumping blood around your body.
How is the heart important?
My guess is.......pretty important. The heart is like a machine, pumping blood to the brain, and all over the body. The heart is like the electricity-socket, pumping electricity to the machine. If someone janks out the cord, then no more electricity to the machine, and the machine stops. Ergo, the heart is very important.
What would happen to your blood if your heart stops?
it stops pumping obviously come on guys lets get with the program
Are people alive when sleeping?
well i would say yes because you ate breathing and your heart is pumping
What do you think will happen if the heart stop pumping?
you would stop breathing and die. after a few days you would get cold and your insides would explode
What would happen if a ramp were coated with a smoother surface the ramps efficiency would?
The answer is : Increase because friction would decrease.
Is the heart important in the body?
Yes, it is very important. If your heart stopped pumping, your brain and you yourself would die within 5 minutes only
Is lipo covered by most insurance?
Liposuction is usually considered optional. Things that are required for health reasons like a heart surgery to keep your heart pumping would be.
