Heart Definition and 156 Threads

http://health.usnews.com/articles/health/healthday/2009/03/16/experts-revise-guidelines-on-daily-aspirin-for.html According to one report, most experts think that a baby aspirin will do.

I *heart* Octopi! You think cats are curious?!? http://www.sciam.com/article.cfm?id=are-octopuses-smart"found and turned a knob...just for fun. Just goofing around. Pulled a plug, and caused a flood. From the article :

Hey guys, can someone make things clear for me? Does the heart goes atrial systole followed by ventricle systole then followed by both the atrial and ventricle diastole (at once) or atrial systole, ventricle systole (at the same time atrial diastole) then only ventricle systole?

I learned today of http://www.nhlbi.nih.gov/health/hearttruth/index.htm , meant to show support for women's heart disease awareness. I cannot find a comparable "men's heart disease awareness" movement -- is there just cause for such gender discrimination?

Is guinness good for you? From Wiki, Studies claim that Guinness can be beneficial to the heart. Researchers found that antioxidant compounds in Guinness, similar to those found in certain fruits and vegetables, are responsible for health benefits because they slow down the deposit of...

Homework Statement Suppose a heart's ventricular wall moves in simple harmonic motion with amplitude 1.8mm and a frequency of 115 per minute. (a) Given a motion detector in contact with the chest produces sound at 2,000,000Hz which travels through tissue at 1.50 km/s. Find the maximum linear...

i'm stuck. i need to explain the advantage to the body in the change in breathing and heart rates. also what does the stimulus, the co-ordinator, and the effector mean.

1. As part of my Advanced Physics 11 course in high school, I have decided to do my major project on the physics of the human heart. I have found many resources and a lot of information, but I really need to go into more depth slash relate it better to physics (it's easy to find the biology side...

KIAs bf has had a massive heart attack, they are due to be wed in 14 weeks time, i mean the guy does not smoke or drink, what the hey is going on, what can i do to help, i do not know how to help

Good afternoon PF, I have been a lurker of this forum for over a year and it is now my time to seek academic advice. I am a university student who has recently finished first year. I have taken honors calculus, physics, chemistry, biology, and sociology and obtained very good standing in...

I found this article, which is relavant to men and some women of 50 yrs or older. Not a Moment Too Soon, I Thought of Tim Russert Tim Russert, a well-known TV journalist died suddenly of a heart attack at the young age of 58. He was being treated for some heart/coronary disease, but...

While I was at work I had it tested. BP was 116 over 82. Heart rate was 63. I guess that's good considering I smoke and don't eat real healthy. .. and I'm 30 for the record. So is that good, bad, normal?

Hey, I"m having a few problems with some motion problems and was wondering if someone could help? The left ventricle of the heart accelerated blood from rest to a velocity of +23.9 cm s-1. If the displacement of the blood during the acceleration is +1.80 cm, determine its acceleration (in cm...

Heart-kun the puppy with the heart shaped fur pattern. :!) http://www.thatsweird.net/picture39.shtml :!) http://www.anicom-pafe.com/techo/archives/2007/10/post_42.html

ScienceDaily (May 2, 2008) — The electromagnetic fields produced by incubators alter newborns' heart rates, reveals a small study published ahead of print in the Fetal and Neonatal Edition of Archives of Disease in Childhood. It is not clear what the long term effects might be, but this could...

Hello everyone I am asking this question because I haven't joined any CPR course yet. The normal procedure requires a lot of force to be applied on the chest. But isn't such a huge pressure harmful for extremely aged people, whose bones are fragile and who may develop other complications in...

Problem solving 2nd order ODE...not for the faint of heart! Hey folks, I'm having problems solving the following set of ODE's: 3H_a^2+H_b^2+6H_aH_b=k_1\rho eq.1 \dot{H_a}+3H_a^2+2H_aH_b=k_2\rho eq.2 \dot{H_b}+2H_b^2+3H_aH_b=k_3\rho eq.3 These are cosmological equations. Note...

A long time ago I read somewhere that people with low heart rates (e.g. athletes) can experience a doubling of their heart rates when they get older (sort of bifurcation in which a single heart beat evolves into two heart beats). I tried to find out more about this phenomena but I didn't find...

What is it called when you get a sudden chest pain that lasts for just a second or two? Homer Simpsons described it as a feeling of a thousand needles stabbing into his heart. I tried to google it but all I got was emo poetry. Your wordth are like a thouthand needleth thtabbing into my heart...

Human Heart Radiation Using Matlab ( Electric Bipole ) Homework Statement Hey There, i was given a project saying : Use Matlab to simulate the radiation from a human heart ( Electric Diode ). What am i supposed to do? How to begin ? Thank You. Homework Equations The Attempt at...

Homework Statement A 1.50-MHz sound wave travels through a pregnant woman’s abdomen and is reflected from the fetal heart wall of her unborn baby. The heart wall is moving toward the sound receiver as the heart beats. The reflected sound is then mixed with the transmitted sound, and 85 beats...

I'm receiving a lecture on Modeling the Heart for about three weeks. We were assigned a problem which required us to find the mean Psa value.. Where Psa(t) = Psa(0)*exp(-t/(Csa*Rs)) and Psa(0) is the initial value, and Csa and Rs are constants. Now What i did is intergrate this like...

Hi, I'm trying to find out what would be the expected pulse rate and frequency of emitted sound by a carp's heart beat where the fish is of size around 5kg (10lb) plus. Does anyone know where I might find such information, or have a reasonable guess as to what it might be?

How would you rate the following in terms of water content: muscle, liver, fat, heart, cartilage, bone marrow and where could i find a table of comparison...?

I walked right past him but didn't realize what was happening. I saw this truck driver parked in an odd place. Apparently he was talking on the cell phone which made me think he was lost, but I took note because he stared at me in a very odd manner as I walked by. I noticed that something was...

Sir, Please help me with this problem. # The heart of a man pumps 4 litres of blood per minute at a pressure of 130 mm of mercury. If the density of blood is 13.6 gm/cc, what is the power of the heart?

I've been having some problems exercising recently. For the last six months or so, lifting weights (10-12 sets of 4 or 5 basic exercises with moderate weights) has often resulted in my heart rate staying at 160 bpm for half an hour, plus the added fun of cold, clammy hands, dizziness, and even...

this may be outdated, but I was under the impression that it was an electrical charge that powered the heart to beat. If so, where does the initial charge come from that started this whole process? thanks dleacock

http://www.telegraph.co.uk/news/main.jhtml?xml=/news/2006/01/20/nblind20.xml&sSheet=/news/2006/01/20/ixhome.html How can having a heart attack make you see again:confused:

http://news.yahoo.com/s/nm/20060109/lf_nm/thailand_stemcells_dc

By releasing acetylcholine, how does the vagus nerve lower heart rate?

Please Evo will you scrub out the silly ones so i do not feel so ancient. i want to be teen age again.

Has anyone made their own ? dad made the" have a heart" puzzle for us kids years ago, they can be fun and cheap to make. http://www.puzzles.ca/puzzles_2.html

A sound wave travels at a frequency 2.25 MHz through a pregnant woman's abdomen and is reflected from the fetal heart wall of her unborn baby. The heart wall is moving toward the sound receiver as the heart beats. The reflected sound is then mixed with the transmitted sound, and 87.0 beats per...

A customer was telling me today about his dad's pacemaker. Modifications are made by the doctor by telephone with the earpiece held over the heart. Apparently the doctor uses a device that emits audio tones for various programming functions. This way the pacemaker can be fine tuned to the...

http://www.abc.net.au/science/news/stories/s1443052.htm One of many articles on the proof that lightning is caused by ice flying around in the atmosphere. Apparently meteorologists are pretty certain about this. What about on Venus? There's a lot of lightning there, but certainly no ice...

it seems that these kinds of animals can prevent blood going throught the lung (pulmonary vein,artey)Can anyone clarify it please?

According to sources I've read, the heart can be stopped by flooding it with "a cold solution containing potassium ions" - why must it be cold? Thanks in advance. :smile:

Can someone help me answer these questions?!? thanx!@ :confused: Explain why blood pressure and heart rate differ when measured in a reclining position and in a standing position. Explain why high blood pressure is a health concern. High blood pressure can lead to many other...

what do heart attacks have to do with cellular respiration and photosynthesis? If anyone can help me understand this, please reply to the thread thanks!

A few questions I need answered before a test. Why does a standing blood pressure and heart rate differ from a reclining blood pressure and heart rate? Why must an athlete exercise harder and longer to achieve a maximum heart rate and blood pressure as compared to an average person...

by Toni Baker Feb. 16, 2005 http://www.mcg.edu/news/2005NewsRel/Estrogen.html (Press Release) Comments?

Someone here mentioned this idea, and I wish to present a possible explanation for review: Earlier, I proposed an hypothesis that mind existed independently of the particular neural substrate we see it implemented in with man (and others); in this view only the dynamics are essential for a...

1)A beam of electrona travels along an evacuated tube towards a floriscent screen.A coil is placed around the tube producing magnetic field along the axis of the tube. a)describe and explain the motion of the beam if: 1)it is exactly parallel to the axis of the tube My working: I think...

can anyone sugest me a good heart beat detector circuit. note the circuit must detect the current from the heart and LED display in a column. -Benzun

Hey everyone! This is not exactly a homework question, but i would like to know anyway.. can anyone tell me how the heart works from physics point of view? Or the nervous system? Any points would be great :) thanks! kateena

Hey everyone! This is a plea for help! :) I was wondering if anyone could explain to me from a physics point of view how the heart/nerves work, and also if possible a pacemaker! Any points would be great, I am feeling a bit lost! :confused: Thanks! Kateena

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While assessing the various tissues in the human body, I was unable to recall ever having heard of the cardiovascular system being affected by cancer. Does cancer of the heart exist, and what is its incidence relative to other cancers?

omg, is there an epidemic or something? All of a sudden a lot of seemingly healthy people seem to be dropping down dead and it is giving me the creeps. My friends' soccer coach recently died on the field, that Hungarian soccer player Miklo, last weekend Marco Pantani and today a 20 yr old girl...