what are the significances of the hearts pacemaker include the use and roles of intermitent pacemakers?
458027
without a pacemaker, such as an intermittent, the heart will continue to go into constant dysrythmia or atrial, ventricular, or sinus fibrillation. this makes it to where the hearts effectiveness(cardiac output) is decreased to nearly if not full asystole(without constriction) and blood will not flow through the body providing oxygen to all the tissues, including "the brain" and you will die due to ischemia- lack of oxygen. the pacemaker "paces" the heart keeping it under control like a kid on Ritalin
429801
the heart generates its own electrical impulses to stimulate the heart to beat . It is the SA node in the atria and the AV node in the ventricles. \n\nWhen patients have been diagnosed as brain dead - and on a ventilator ( a breathing machine )  - their heart is still beating - because the heart has its own built-in battery pack, so to speak .
739375
The heart is interesting.  You can also bring in some of the common disorderes of the heart (depending on how long the project is...)\nThe site below will help you off to a good start...:D
1097141
THe heart is made up of two pumps; one that contains oxygenated blood, and one that contains deoxygenated blood...they are divided by this thick wall called a septum...each half is made up of a ventricle and an atrium...that question was on my science quiz today!!!
68383
Heart, Brain, Spleen, Kidney, Blood, etc.\n\nJust kidding.\n\nMy son now that I have one.  Without him I'd not have any use for anything.
791319
look at the noted citation\n \n   \nWhat Is ...  \nHow the Heart Works  \nCauses  \nSigns & Symptoms  \nDiagnosis  \nTreatments  \nLiving With  \nKey Points  \nLinks  \n \n    What Is Atrial Septal Defect? \nAn atrial septal defect (ASD) is a hole in the wall (septum) that separates the two upper chambers (atria) of the heart. The defect allows blood to flow from one atrium to the other, usually from the left side to the right side. This causes extra blood flow:\n\nIn the right atrium \nIn the right ventricle \nTo the lungs \n\n\nFigure A shows the normal anatomy and blood flow of the interior of the heart. Figure B shows a heart with an atrial septal defect, which allows oxygen-rich blood from the left atrium to mix with oxygen-poor blood from the right atrium. \n\nIn a normal heart, oxygen-poor (blue) blood returns from the body to the right atrium. From the right atrium, the blue blood flows to the right ventricle—one of the two lower chambers of the heart—and is pumped to the lungs to pick up oxygen. After traveling through the lungs, the blood is now oxygen-rich and red. The red blood returns from the lungs to the left atrium and goes to the left ventricle, where it is pumped to the body. The right and left sides of the heart are normally completely separated by the septum. The septum keeps the blue blood from mixing with the red blood. The later section "How the Heart Works" explains the process in greater detail.\n\nASD is the second most common congenital heart defect.\n\nMore than 3,000 babies are born with ASD each year in the United States. \nASD occurs twice as often in girls as in boys. \nEffects of Atrial Septal Defect\nOver time, the extra blood flow to the right side of the heart and the lungs can cause:\n\nEnlargement of the right atrium and the right ventricle. \nRight heart overload. The right side of the heart has to work harder to pump extra blood to the lungs, especially as resistance in the pulmonary (PULL-mun-ary) artery increases. Over time, the heart may become overworked, and function may become impaired. This is exceedingly rare with modern methods of diagnosis and treatment. \nIrregular heartbeats or rhythms (arrhythmias). Extra blood flowing into the right atrium through the ASD can cause the atrium to stretch and enlarge. When this occurs, a fast heartbeat can develop with symptoms such as dizziness, fainting, or chest discomfort. \nStroke. Occasionally a blood clot in a vein or in the right side of the heart can pass through the ASD and enter the blood stream, where it can block an artery supplying the brain and cause a stroke. \nPulmonary artery hypertension. This is when high blood pressure exists in the arteries that carry blood to the lungs. The extra blood being pumped to the lungs can increase the pressure in the pulmonary arteries. Over time, high pressure can damage the arteries and the small blood vessels in the lungs. They thicken and become stiff, making it harder for blood to flow through them (pulmonary vascular disease). \nUsually, most of these effects don’t show up until adulthood, often around age 30 or later. They are rare in infants and children.\n\nCharacteristics\nAn ASD is classified by its size and location.\n\nSize\nThe size of an ASD can range from small to large.\n\nMost small defects close on their own as the heart grows during childhood. They usually allow only a small amount of blood to flow between the atria. \nModerate to large defects are much less likely to close on their own. They allow two or more times the normal amount of blood to flow through the right side of the heart. Large holes sometimes cause symptoms during infancy or childhood. \nLocation\nThree major types of ASD exist, based on the location of the defect on the septum:\n\nSecundum. This defect is in the middle of the septum. It is the most common form of ASD. About 7 out of every 10 babies born with ASD have this type. This type often closes on its own, unless it is large. \nPrimum.
108453
Usually three electrodes, more or less, are stuck to your chest, and connected to a recorder.  You do your thing as normally as you can during the day, and the recorder makes a record of the electrical activity of your heart: it is like having an EKG that lasts 20 or more hours.\n\nThe data from that recorder is run through a machine that analyzes each beat electronically, and summarizes what it sees.  Often, what the machine is constructed to consider worth the effort, is displayed too--specific records of sequences of beats that are possibly interesting.\n\nThe point is to catch abnormal rhythms of the heart, and to see if there is any electrical activity that indicates an impoverishment of the blood flow to a part of your heart.  Since the person wearing the Holter writes down any symptom and when they have it, the monitor can be cross-checked with what the person is doing and feeling at any given time.\n\nDoes that help?
533788
The pacemaker has to be small and electrically safe. Water takes up a lot of space.
322968
The artificial heart\nArtificial heart valves\nDialysis Machine\nUltrasound\nMRI\nFluoroscopy\nCT Scan\nBio-Mems\nProsthetic Limb\nStents\nVascular grafts\nInfrared Cameras for motion analysis\n\nPersonally designed a device that uses accelerometers to measure Essential Tremor in children.\nHope that helps
1148696
I am very sorry to hear about your loss.  You have my sympathies.\n\nTo guess at what happened in this context would be simply guessing.  I agree that it was a good idea to insert an internal defibrillator to address your husband's very dangerous condition.  Indeed your husband had "cheated" death on two prior occasions.  \n\nThe fact that your husband died so rapidly does suggest that there was some catastrophic event...some of these types of events do not even have anything to do with the heart - like an aneurysm or a dissection of the aorta.  There is a possibility that he died of something non-cardiac.  Was there an autopsy done?\n\nWhen the device goes off, I have never heard of one prompting a heart attack or an arrhythmia even if it went off erroneously, which by the way, I have never heard of that either.\n\nThere is a possibility that one of the leads that connect to the heart became displaced and although the device sent a shock, if it was not connected then no shock got the the heart muscle where it was needed.  The device can be 'interrogated' to determine if there was any cardiac event and if the device malfunctioned.  I think that your cardiologist and the manufacturer would WANT to know whether the device was implicated, so the problem does not happen again.\n\nGood luck and god bless.\n\nDue respect to pacer whiz, but your question implies that a pacemaker was just implanted.  If that were the case, most certainly a known defective unit would not have been used - short of some total meltdown in safety procedures.  Therefore checking the serial number is not going to be useful.
434592
A Taser will not disrupt a pacemaker.  The amps are too low to affect the internal systems of the body.  Tasers are no more harmful to the body than an really bad static shock.  Pacemakers are designed to be protected from such electrical impulses.
321639
It most definitely does. Magnets are used for calibrating pacemakers when there first put in for setting beat impulses to the heart when needed to determine and  maintain a pulse level.
935401
Heart, arteries, veins.
290391
You dont nessecarily need a pacemaker as drugs will help this ,but there are a number of things that cause irreg heart beats like caffiene nicotine overwork stress see a doctor to
592754
it has so many functions.. all concerning autonomic actions (involuntary actions) - \nthe most important are: \n1- control of cardiac activity (it has 2 centers: cardiac accelerating and inhibitory centers)\n2- control of respiration (via dorsal and ventral motor neurones)\n3- regulation of heart rate and respiratory rate via central chemoreceptors\n4- regulation of arterial blood pressure by controlling the diameter of arterioles via vaso-motor center\n5- control of vital actions as swallowing ...etc
11671
How does the heart beat?\n\nThe atria and ventricles work together, alternately contracting and relaxing to pump blood through your heart. The electrical system of your heart is the power source that makes this possible.\n\nYour heartbeat is triggered by electrical impulses that travel down a special pathway through your heart.\n\n    * SA node (sinoatrial node) – known as the heart’s natural pacemaker\n      The impulse starts in a small bundle of specialized cells located in the right atrium. The electrical activity spreads through the walls of the atria and causes them to contract.\n\n    * AV node (atrioventricular node)\n      A cluster of cells in the center of the heart between the atria and ventricles, the AV node is like a gate that slows the electrical signal before it enters the ventricles. This delay gives the atria time to contract before the ventricles do.\n\n    * His-Purkinje Network\n      This pathway of fibers sends the impulse to the muscular walls of the ventricles, causing them to contract.\n\nAt rest, a normal heart beats around 50 to 99 times a minute. Exercise, emotions, fever and some medications can cause your heart to beat faster, sometimes to well over 100 beats per minute.
182252
I believe the answer about the heart being independent is incorrect. The heart is controlled by the autonomic nervous system, which is not consciously controlled. This same system also makes you stomach digest food among other things. Adrenaline (a hormone released by the pituitary gland in the brain) makes the heart beat faster at times and noradrenaline relxes it. When the heart is taken out of the body, neurons are still firing within the heart, but without the central nervous system, it will cease to beat.