Death By Pooping

[casebro]

Lots of ammonia involved too, from the breakdown of proteins by the pro-biotic beasties, plus sulfer dioxide, also from proteins... Now, if we could innoculate everybody with a yeast/fungus/bacteria that gives off nitrate, to open constricted arteries, we could cure coronary disease...without the fiber!

 

[Dancing David]

The action of holding your breath in the valsalva's manouevre puts pressure on the diaphragm and along with the abdominal muscles squeezes the abdomen to force poop into the rectum.

I dont have to apply that much pressure just enough to pop my eaqrs or make them squeak.

 

[Just Me]

That's seem logic to me considering that the burning of wood will create a multitude of new chemicals that can hide the other smelly compounds. The same principle that so called air fresheners operate by.

As I understand it, you like the match to get the smell of sulphur in the air. The sulphur is in the matchhead.

Re Valsalva manuevers, powerlifters and Olympic weightlifters commonly use this texhnique. It increases stability and strength. One thing my former olympic weightlifting coach didn't teach me was to "pinch a loaf" during the manuever.
I went anemic from blood loss-down the toilet.

 

[Aardvark]

1 Valsalva maneuvre is a forced expiration against a closed glottis, that is closed, therefore this would have no effect on the Inner ear pressures. The technique used by divers is similar but the glottis is open so as to pressurise the pharynx and therefore not strictly a Valsalva.

2 Poop is moved from the Colon into the rectum by a process of Haustral shunting, similar to peristalsis but more segmental. This is driven primariliy via the gastro-cholic reflex which is linked to distention of the stomach.

3 Once poop is in the rectum, then kicks in the defecation reflex, this is under voluntary control up to a point!!!!

4 During breathing in or inspiration, a negative intra thoracic pressure is created which not only sucks air into your lungs but also sucks blood into the right side of the heart. If you fill the heart better, you get a better stretch and a better contraction, see the Frank Starling Law, this leads to higher cardiac output for that beat. If you stretch any striated muscle you will always get a better rate of contraction when you trigger the change.

Now If you do a Valsalva, you have a positive intra thoracic pressure which reduces right heart filling and output, lower output plus with a positive pressure it is harder to fill the coronary circulation, the coronaries fill during diastole not systole, that is, when the heart is relaxing.

To hear what happens, take a student stethoscope and listen to a friends heart whilst he or she take a deep breath, listen to the change in beat. Now get them to do a Valsalva and again you will hear a different beat.

This has been simplified as of course, cardiac output is measured at the left hand side of the heart, but the heart is maintains beat to beat variation and right in equals right out equals left in equals left out

I can imagine how straining at stool has an impact in a patient with NYHA stage 3 or 4 CHF or with multiple blocked coronaries.

So if you do not want to die in the latrine
1 eat plenty of veg
2 eat less fat
3 drink plenty of water
Excercise

 

[Aardvark]

double post

 

[Just Me]

snip

4 During breathing in or inspiration, a negative intra thoracic pressure is created which not only sucks air into your lungs but also sucks blood into the right side of the heart. If you fill the heart better, you get a better stretch and a better contraction, see the Frank Starling Law, this leads to higher cardiac output for that beat. If you stretch any striated muscle you will always get a better rate of contraction when you trigger the change.

snip

Does this also have to do w/ plyometrics and preloading a muscle for a more powerful output?
Specifically, your last sentence.

 

[Aardvark]

Does this also have to do w/ plyometrics and preloading a muscle for a more powerful output?
Specifically, your last sentence.

Yes, the Frank Starling law or mechanism relates to pre loading of the cardiac muscle.

We call this End Diastolic volume or a measure of how big the ventricle is when it has filled. Often measured as a function of End Diastolic Pressure, but really volume is more accurate to the stretch of the muscle fibres.

Scientists can measure volumetric contraction or change in pressure with change in time, dp/dt and plot this as a curve of pump efficiency or systolic function. Interestingly, the heart also relaxes and fills and this can also be plotted as dp/dt but this is a measure of filling function or diastolic function.

In a failing heart we can use chemical stimulus to improve the dp/dt or contactility, these are refered to as inotropes. Things wich improve relaxation and filling are refered to as lucitropes

' The Great Dr Starling in his law of the heart, said output is greater if right at the start, the cardiac fibres are stretched a bit more so the force of contraction is more than before, thus the greater the volume there is in diastole, the higher the output is likjley to be'

This was part of a rhyme tought at some UK medical Schools

 

[Skeptic Ginger]

Just to add a little more detail here. While stimulating the vagus nerve thus slowing the heart is one result from the valsalva maneuver, it isn't the only one.

There is some risk when straining if you already have coronary artery blockage. The cardiac arteries fill on the back stroke of the heart rather than during ventricular contraction. When you inhale, you create negative pressure in your chest to draw in air. But you also draw in blood from the veins returning blood to the heart. When you hold your breath and exert pressure, you raise the pressure in the chest. That essentially slows cardiac return (the blood coming back to be pumped out again). But it also makes it difficult for the cardiac arteries to fill with that back stroke if the chest pressure is too high. An artery that is already narrowed from plaque can clot off altogether during a valsalva maneuver.

So you can stimulate the vagal nerve which slows the heart rate. Or you can lose blood flow to the heart from increased chest pressure. It's typically stopping or slowing the blood flow to the heart that causes a heart attack like the one Presley died from. Slowing the heart rate doesn't help but slowing your heart rate by itself would only cause a heart attack in a small number of people with heart rhythm problems. Triggering an artery to clot off is the more common event.

And a healthy person is not going to have the problem. The arteries have to be very narrow in the first place.

 

[Dancing David]

1 Valsalva maneuvre is a forced expiration against a closed glottis, that is closed, therefore this would have no effect on the Inner ear pressures. The technique used by divers is similar but the glottis is open so as to pressurise the pharynx and therefore not strictly a Valsalva.

I guess I misunderstood a previous post, it sounded like the thing that divers do.

 

[EagleEye]

My grandfather died on the toilet... heart attack...

 

[Aardvark]

My grandfather died on the toilet... heart attack...

Gone with the wind?

 

[Iamme]

This is all more than I wanted to know. However, I will take it as a suggestion that I should be as relaxed as possible while on the toilet.

~~ Paul

Well...see if you really can, the next time it is half in and half out... and there you sit, knowing you have to be to work in 5 minutes.

 

[a_unique_person]

1 eat plenty of veg
2 eat less fat
3 drink plenty of water
Excercise

Why is always the same advice?

 

[JollyRoger]

thier is a real bad joke in this one someplace

 

[Mycroft]

In my wife's family, her younger brother is married to a woman who is a nurse, registered type, who works at a cardiac center.

recently my wife's family said that this nurse stated that there must be a nerve that connects pooping to the heart and that it leads to death in the elderly, which is why so many dead people are found on the stool.

Out of politeness I did not laugh out loud, but this sounds like the making of urban legend to me!

A person who feels discomfort in their chest area might seek a moment of privacy in a place where they know they will be left alone while they decide if it's just gas and can safely be ignored.

 

[Just Me]

Why is always the same advice?

Because good advice rarely changes?

 

[Skeptic Ginger]

Sorry, I see Ardvark posted what I said and somehow I had missed it yesterday. Carry on, I shall slink out with a "nevermind".

 

[Aardvark]

Sorry, I see Ardvark posted what I said and somehow I had missed it yesterday. Carry on, I shall slink out with a "nevermind".

Not at all, you added and extra piece to the jigsaw and a better and easier understood explanation.

 

[Skeptic Ginger]

Not at all, you added and extra piece to the jigsaw and a better and easier understood explanation.

Thanks, you are too kind.

Actually I did refrain from using intra thoracic pressure, volumetric contraction, End Diastolic Pressure (and diastole), glottis, contactility, lucitropes, inotropes, etc., on purpose.

 

[Aardvark]

Thanks, you are too kind.

Actually I did refrain from using intra thoracic pressure, volumetric contraction, End Diastolic Pressure (and diastole), glottis, contactility, lucitropes, inotropes, etc., on purpose.

My dear Skeptigirl, I never doubted it for a second