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Health Forum    Heart Diseases
Health Discussion Forum

 i was born with a slight murmur on my heart?
I was just wondering what is this? Does it is amatter that i have a problem with my thryoid gland as well. Would someone mind explaining what a slight murmur is and is it safe or ...


 What is the best first aid/cure for a broken heart?
My heart is bleeding right now. Somebody help me....


 Margarine or butter?

Additional Details
I like butter myself. I never fry it either....


 Anxiety attacks can they be cured?
Can anxiety attacks be completely cured? For a month now Ive been told I am having anxiety attacks, I can handle the symptoms but obviously i want them to go away, the one symptom I cant handle is ...


 blood pressure reading of 115/70 is this normal or to low? I had just ate like 30 min earlier.?
...


 Does angina mean I'm having a heart attack?
...


 Is poor circulation associated with heart disease.?
Thank you for your answers
Have a great ...


 What actions should one take after surviving a heart attack?
My mother recently survived a heart attack and had some sort of operation in Taiwan, I'm sketchy of the details but I know she felt it coming on and got to a hospital. She asked me what she ...


 What should the figures read on a blood pressure machine for one to be normal? What is the normal heart rate?
Is 76 too low for the heart and if so what happens then?
Additional Details
Matador.You have taken the bull by the horns! Thank you for being so thorough....


 In desperate need of help....?
Explain how you cannot catch heart disease:
My science teacher gave me homework to explain how you cannot catch heart disease. I researched and cannot find anything on it and my homework is due ...


 Should i go to the hospital?
i just had my arm bitten off by a shark on my fishing vessel and im not losing that much blood or blacking out so WHAT DO I DO?
Additional Details
ok im not blacking out or anything and ...


 broken heart = literal heart hurting?
I didn't know it would literally hurt? I thought it was just a figure of speech..

Q: Why does my heart/chest hurt?...


 21 yr/o female. having heart palpatations. chest pain. tightness.?
i can feel my heart hammering in my chest, along with pain in my chest and throat when i breathe. it started with symptoms of tight chest, like someone was sat on it! but now i get these plapatations ...


 I have high cholesterol and I was wondering, can I eat anything that doesn't have cholesterol in it?
I have been eating stuff like Starburst and Skittles because it doesnt have any cholesterol in it but is it still healthy for me to ...


 can someone just die from like a heart attack or stroke or do they feel it?
like if someone is going to die from a heart attack or stroke do they feel the pain like a day before or does it happen all of a ...


 My dad is in a coma due to a heart attack. What are the common signs of waking up ? what do we hope to see ?
I would like to know from other people's experience about some signs that they have seen and that have led to the recovery ? and what was the recovery like ......


 Why is my resting heart rate 76 beats per min?
is this too fast for someone who is aged19, male and doesn't much exercise!...


 i have a missing heart beat, can this be dangerous ?
i have a missing heart beat, can this be dangerous ?...


 Fear of having a heart attack?
i'm only 19 and i have a fear of having a heart attack, i get palpitations, tight feeling in my chest, can feel my pulse in my head, neck, stomach and sometimes in my legs and wrists, every time ...


 is this doctor right?
went to see a doctor last week ( not my regular one ) and checking my records found out that i had a heart attack last year ( i went with an unrelated problem ) and increased my dose of ramipril from ...



Vallabhii
How does the heart continue beating after removal from the body?
I tried google but I didn't find anything :S

A heart will continue beating for about 30 - 40 minutes when removed from the body (if placed in oxygenated, isotonic saline solution). Explain how this can occur?

Thank you in advance :)
Additional Details
What is a saline solution?
                      









heavy_cow
This is simply not true.

The brain stem sends electrical impulses to your heart, which causes the beating, once the nervous pathways have been removed, electrical impulses will stop, and thus the beating of the heart will stop too.

It would be like your engine running with no more gas, it just ain't going to happen.


Victor
Rating
30 to 40 minutes? Are you sure? That doesn't sound right. I can imagine a few seconds due to the muscle spasming with leftover voltage, but not half an hour.


Paul
Rating
Because the heart is more than a mere muscle


Fred Flintstone
I don't know if it would always continue for such a long time, and if so why it would ever stop, but I believe heart muscle fibres twitch automatically as long as they have a supply of oxygen.


Carl Fredrickson
Rating
that is very interesting, but i don't believe that is possible. i mean 30-40 seconds makes more sense to me, sort of like how a chicken will run around with out it's head


origamimark
the heart is automatic in its action, a bit like the muscles that control blinking and breathing.


Derek
Yes. The heart can continue to beat outside the body, if placed in a lactated ringer's solution. The heart contains multiple pacemaker cells which generate its own electrical impulse without any outside stimulation. The primary one is called the sinus node. Have you ever heard of sinus rhythm. That is where it comes from. The sinus node, and atria of the heart is innervated by the vagus and sympathetic nerves. These nerves control your heart rate, among other things. However the heart will still beat without these inputs. When a person gets a heart transplant, his nerves are cut away from his heart, and his old heart is removed. When his new heart is placed in his chest, the severed nerves can not be reconnected. Nerves take an extremely long amount of time to regenerate. So this man will have no nerve connections to his heart. This man's heart rate will be determined by the sinus node (100 bpm). The man would also not be able to feel his heart pounding or angina.


The reason it must be placed in a lactated ringer's solution is because the heart must be supplied with ions (sodium, calcium, and potassium) to generate electrical activity. Ringer's lactate contains sodium, calcium, and potassium.

The human heart would beat outside the body if placed in a ringer's lactate solution, however it would only last for a short period of time because the heart also needs oxygen supplied to each cardiomyocyte (heart muscle cell).

A common science demonstration is the removal of a frogs heart, and placing it in a solution. It will beat outside the body for atleast 30 minutes. I forgot the exact amount of time, but I know it is atleast 30 minutes. It also depends on temperature, and other factors.


kari w
It cannot occur!


Rhianna
Because the cardiac muscle is myogenic, meaning it has the property of being able to contract rhythmically independent of any nerve supply. So the autonomic nervous system modifies the speed of the heart beat but the heart can actually be removed from an animal and continue beating. Isotonic solution/saline is basically sodium chloride that is isotonic to body fluids, and is therefore able to maintain living tissue temporarily. It contains the same concentration of ios as blood and the cells of the body.


Joy Beth
Rating
creepy ..... probably nerve endings that are still firing. Like when a chicken still runs around without a head, or a spiders leg still wiggles if you pull it off. shudder shudder


12 lead ekg
the heart has a property called AUTOMATICITY. this means it can generate its own electrical current without any external stimulus because of the conductive pacemaker cells like the sinus node. so the heart will continue to beat after it is removed but will eventually die because of hypoxia caused by the lack of oxygen supplied to it by the coronary arteries who in turn get it from the aorta who in turn gets it from the left ventricle who in turn gets it from the lungs which will now be detached from the heart


aziz
Rating
SA node is the pace maker of heart, until the ATP and oxygen depletes the heart go on pumping and sa node will be producing the electrical stimuli for the myocardial elicitation. this is the simplest way i can answer.


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