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Heart
The heart is a major organ of the body that is found in the circulatory system. It pumps blood throughout the blood vessels. Questions related to the heart should be put here.
8,781 Questions
What does the superior vena cava do in the heart do?
carries deoxygenated blood from the body into the right atrium of the heart.-Akilae
Why are the walls of ventricle thicker than the walls of auricles?
The walls of the Ventricles are thicker than the walls of the auricle since blood is pumped to the different parts of the body from the auricle thus requiring it to be thicker to handle the pressure applied.
The 24 ambulatory monitoring of the heart is called Holter monitoring
What is the medical term meaning built-in or intrinsic rhythm of heart contractions?
Autorhythmicity
The heart is made of tissue that is specific to the cardiac muscle. The beating of the heart, in most healthy individuals, intrinsically arises in the SA (sino atrial node) in the upper right chamber of the heart. A normal resting heart rate is commonly considered to be between 60 and 100 beats per minute. In some very well trained athletes or in periods of meditation a normal resting heart rate may be less than 60.
What structure supplies oxygenated blood to the heart muscle?
Coronary arteries. The orifice of the coronary arteries are located on proximal part of the ascending aorta, and there are two orifices branching into the left and right coronary arteries.
The marginal, anterior and ventricular arteries provide the cardiac muscle with oxygenated blood.
The coronary arteries are the major vessels bringing blood to the heart muscle. The are the left and right coronary arteries, the left having a common trunk followed by the circumflex and anterior descending branches. Each of these give off side branches which bring blood and hence oxygen to the heart muscle. Coronary arteries fill during diastole.
There is a right coronary artery and the left coronary artery. In total there are four coronary arteries.
What should the pulse rate of a 47 year old male be?
My resting rate is 45-48; during exercise I try to stay in the 115-125 range. I am 57 and exercise 6 days a week 4 days running, 2 days weight lifting. I am 5'10 and weigh about 210 with a BF of 20%.
Which vessels transport blood toward the heart and have valves?
The venous system, or "veins" are responsible for bringing blood back from your peripheral body to the right side of the heart, where it is sent to the lungs for reoxygenation. Veins have one way valves that function to maintain a stable pressure in the venous system, while increasing the efficiency of the heart by preventing backflow of blood in between ventricular beats.
When does the heart develops in fetus?
- At 18 days [when the mother is only four days late for her first menstrual period], and by 21 days it is pumping, through a closed circulatory system, blood whose type is different from that of the mother. J.M. Tanner, G. R. Taylor, and the Editors of Time-Life Books, Growth, New York: Life Science Library, 1965, p.
- With an ultrasound, at about 3 or 4 weeks. With the device the doctor uses in the room, at about 9 weeks. I don't know for the things you buy at the store.
- I am going to disagree with this last answer. With a vaginal ultra sound a heartbeat can be detected as early as 6 weeks gestation but more commonly by 7-8 weeks gestation. Of course she could be right and we are just counting the weeks differently.
- With my first child my Dr. could hear my son's heart beat at 7 weeks with out a ultra sound and now being pregnant with my second child and having the experience in a medical setting working in a OB practice I have heard my baby's heart beat at 5 weeks and 3 days.
- Mayo Clinic says the heart begins to beat at 5 weeks and may be seen with an ultrasound.
- But note that the Mayo Clinic, numbers the weeks according to the start of the last period, so that conception is regarded as happening in week 2; thus the heartbeat begins during the 4th week after conception.)
What causes rhythmic beating of the heart?
When blood and air is tranferred into the heart, the heart has to start beating unless we are dead.
The rhythmic beating of the heart is maintained by the Sinoatrial node (80-100 beats/minute), the Atrioventricular node (40-60 beats/minute) or the Purkinje fibers (20-40 beats/minute). It involves the membrane potential of specialized myocardial cells in these parts. Once regions of the heart are fully depolarized (such as the ventricles), contraction follows. Immediately following depolarization comes repolarization, and thus the cycle can repeat itself.
What can you live without longer your heart or brain?
Yes, one can live without a heart, but the function of the heart must be replaced by another item performing the same tasks, that is circulating a person's blood.
Science has developed "heart machines" that can do so for short terms, such as during and shortly after various operations.
However, without blood circulation, the body ceases to be able to survive.
Which artery connects heart to arm directly?
The coronary arteries are responsible for carrying oxygen-rich blood to the heart. However, most oxygen-rich blood is being carried away from the heart, meaning that most arteries are not carrying blood into the heart at all. Veins are responsible for carrying de-oxygenated blood towards the heart so that their oxygen supply can be replenished in the lungs.
The two veins which actually enter the heart are the superior vena cava or the precava which carries blood from the upper half of the body into the heart and the inferior vena cava(IVC), also known as the posterior vena cava, which carries blood from the lower half of the body into the heart.
What is the sequence of blood through the heart?
The wave of contraction in heart is initiated by S.A. Node which leads left auricles to contract. This wave of contraction is received by A.V.Node which contracts right auricle and spreads the wave of contraction to bundle of his and finally to purkinje fibre which contracts the two ventricles simultaneously anterioposteriorly. Therefore sequence of contraction is 1Left Auricle 2 Right auricle 3 ventricle
What lower chambers of the heart pump out blood of the organ?
The left ventricle. Blood from the body comes into the right atrium goes into the right ventricle and is then pumped to the lung comes back to the left atrium and then left ventricle to the aorta to the body.
The right side of the heart pumps blood to the lungs
What is normal heart sounds heard while the heart is working?
Valves opening and closing and blood flowing
The normal action of the heart, the pumping of the chambers and the closing of the valves.
Closing of the valves
Lub = closing the AV valves
Dub = closing of the semi lunar valves
The heart beats when the blood pumps
What are the 3 main vessels of the heart?
There are actually four valves in the heart: The tricuspid valve, mitral valve, pulmonary semilunar valve, and aortic semilunar valve. If you needed to list three different types of valves, you could consider both semilunar valves as one configuration type. Then you would have: Tricuspid valve, bicuspid (aka mitral) valve, and semilunar valves.
What chamber of the heart is responsible for pumping blood to the body's various organs?
The human heart has four chambers, two superior atria and two inferior ventricles. The atria are the receiving chambers and the ventricles are the discharging chambers. The left ventricle, feed through the bicuspid valve (mitral valve), pumps blood out to the body.
Pertaining to the wall between the lower chambers of the heart is?
A septum connects both upper and lower chambers of the heart. This one is the ventricular septum.
What is the scientific name for a heart attack?
Myocardial infarction (often abbreviated MI) is the medical terminology for heart attack. An MI occurs when a blood clot reaches cardiac tissue resulting in death of the affected area. Normally tests for such a condition would include blood tests (e.g. troponin T) and ECG. Occaisionally an echocardiogram might be ordered to establish an ejection fraction.
Myocardial infarction (MI) or acute myocardial infarction (AMI), is commonly known as a heart attack.
Cardiac Arrest
You can call it a 'myocardial infarction' if you want. I'd stick with 'heart attack' because people don't say "huh?".
It can also be known as either of the following: Acute myocardial infarction (AMI for short) Or Myocardial infarction (or MI for short).
she will take medicine to suppress her immune system
What is the scientific name for heart rate?
The muscle that the heart is made out of is called the cardiac muscle. There are terms that represent heart attack and the heart muscle, but there isn't an exact scientific name for "heart". It's simply called heart.
Area where the great vessels leave the heart?
Four main blood vessels enter/exit the heart: two veins and two arteries. Oxygenated blood enters the left ventricle through the pulmonary vein. This same blood is then pumped out of the left atrium via the aorta. Meanwhile, de-oxygenated blood enters the heart in the vena cava; before leaving through the pulmonary artery.
Where is the blood going to when it leaves the right side of the heart?
The pathway of a red blood cell from the right atrium and back.
(1) right atrium ->
(2) right AV valve ->
(3) right ventricle ->
(4) pulmonary valve ->
(5) pulmonary trunk ->
(6) pulmonary arteries ->
(7) lungs, for exchange of gases (not shown) ->
(8) pulmonary veins ->
(9) left atrium ->
(10) left AV valve ->
(11) left ventricle ->
(12) aortic valve ->
(13) aorta ->
(14) other systemic vessels ->
(15) inferior and superior venae cavae ->
(16) back to the right atrium
The pathway from 5 to 8 is the pulmonary circuit.
The pathway from 13 to 15 is the systemic circuit.
