Sunday, September 28, 2008

Do heartbreaks and heart aches really hearts weaker and more susceptible to heart disease and heart attacks

Do heartbreaks and heart aches really hearts weaker and more susceptible to heart disease and heart attacks?

Heart Diseases - 4 Answers
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1 :
no
2 :
Yes. Read A Cry Unheard: The Medical Consequences of Loneliness by James J Lynch.
3 :
Absolutely not. However, people might say something like that because they do cause stress and anxiety. That might contribute to something waaaaaaaaaaay down the road, and if you were bad shape and prone to heart trouble. So in a very very convoluted way, someone MIGHT think that.
4 :
Yes i read an article about it, It wears the heart out because your emotions cause blood t shoot up from your bloodstream which causes tiny "tears" in your heart (like tearing paper).Yeah it leads to anxiety attacks.Itâ€™s thought that a surge of stress hormones, such as adrenaline, might temporarily damage the heart of some people. How these hormones might hurt the heart or whether something else is responsible isnâ€™t clear

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Wednesday, September 24, 2008

STATS QUESTION:A study is conducted to determined if there is a greater rate of heart disease in lefties vs

STATS QUESTION:A study is conducted to determined if there is a greater rate of heart disease in lefties vs.?
A study is conducted to determined if there is a greater rate of heart disease in lefties vs. righties. A random sample of 500 lefties showed 40 had heart problems. While 500 righties showed 30 had heart problems. Is this difference significant at a 5% level to show there is a difference between righties and lefties?
Mathematics - 2 Answers
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1 :
No, since the two samples are not equally-representative of their respective populations
2 :
We should perform a test of hypothesis. Let P1 be the population proportion of lefties have heart diseases P2 be the population proportion of righties have heart diseases. The appropriate hypotheses are: H0: P1 <= P2 H1: P1 > P2. Now let p1 and p2 be the sample proportion of lefties and righties have heart diseases, respectively. Here p1=40/500 and p2=30/500. We reject H0 (accept H1) if and only if: (p1-p2)/s > z, where s = ( p(1-p)*(1/n1+1/n2) )^1/2 ; p=(m1+m2)/(n1+n2), m1=40, m2=30, n1=n2=500, z = -1.64 (0.05-percentile of standard normal distribution). I leave the computations to you!

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Saturday, September 20, 2008

A person suffering from terminal heart disease might want to receive an artifical heart, but be unable to pay

A person suffering from terminal heart disease might want to receive an artifical heart, but be unable to pay?
what, then, is the source of effective demand for this technology? who ultimately pays for it, and why???
Heart Diseases - 1 Answers
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1 :
if you have terminal heart disease I would decide not to receive artificial heart .. because it is short term and allot of operations I rather enjoy the life I have left, there is private organizations, people around the world donate money to save someones life

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