Why does Pulmonary Artery Wedge pressure equivalent to left atrial pressure?

I am confused because pressure usually drops across a capillary so why would the pulmonary artery be representative of the LA (which is after the capillary). The following image is the best diagram I could find while trying to figure this out but I am still confused. Any help would be appreciated.

https://preview.redd.it/9tjl0cqjdep31.png?width=664&format=png&auto=webp&s=b380108f00543c3998c984a47dc58f970cd104cc

https://preview.redd.it/ebk9dnm9eep31.png?width=1039&format=png&auto=webp&s=6b98027a2da7a743eb64e43a92c624870d71ec9a

πŸ‘︎ 6
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πŸ‘€︎ u/Bulbesaur
πŸ“…︎ Sep 28 2019
🚨︎ report
If this graph scares you, THAT IS THE POINT! Wedges like this can be a toss up for downward or upward pressure.The goal here is to convince you that this is a sharp drop out of the wedge, and scare people.Don’t fall for it.TA has been our friend, and they know that.Don’t let them use it against you.
πŸ‘︎ 8k
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πŸ‘€︎ u/MyDogHasToes
πŸ“…︎ May 10 2021
🚨︎ report
If this graph scares you, THAT IS THE POINT! Wedges like this can be a toss up for downward or upward pressure.The goal here is to convince you that this is a sharp drop out of the wedge, and scare people.Don’t fall for it.TA has been our friend, and they know that.Don’t let them use it against you.
πŸ‘︎ 119
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πŸ‘€︎ u/Dazzling_Staff
πŸ“…︎ May 10 2021
🚨︎ report
If this graph scares you, THAT IS THE POINT! Wedges like this can be a toss up for downward or upward pressure.The goal here is to convince you that this is a sharp drop out of the wedge, and scare people.Don’t fall for it.TA has been our friend, and they know that.Don’t let them use it against you.
πŸ‘︎ 79
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πŸ‘€︎ u/Nazereth_99
πŸ“…︎ May 10 2021
🚨︎ report
Isnt pulmonary dual supply? Doesn't wedge infarct mean single supply?

https://preview.redd.it/srqspfwb5me41.png?width=1139&format=png&auto=webp&s=379932e0dde1c1711d5706ab657eaa0b0d5f6ec8

πŸ‘︎ 2
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πŸ‘€︎ u/justthathrowaways
πŸ“…︎ Feb 03 2020
🚨︎ report
If this graph scares you, THAT IS THE POINT! Wedges like this can be a toss up for downward or upward pressure.The goal here is to convince you that this is a sharp drop out of the wedge, and scare people.Don’t fall for it.TA has been our friend, and they know that.Don’t let them use it against you.
πŸ‘︎ 10
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πŸ‘€︎ u/Nazereth_99
πŸ“…︎ May 10 2021
🚨︎ report
Has anyone had pulmonary hypertension or high blood pressure since diagnosed?

I was diagnosed with mctd in July and was prescribed Plaquenil. Was on it from the end of July till mid September. At first I didn’t notice any side affects but mid August/Sept I kept chest pains. I went to multiple doctor appointments and blood pressure was high (140/90ish and 150/90ish). Again was taken off Plaquenil but still having chest pains. Haven’t had my blood pressure taken since stopping medication. I go to my rheumatologist tomorrow. After looking at articles online I see pulmonary hypertension being linked to mctd. Has anyone experienced this? Any advice going to the doctor tomorrow since I’m just recently diagnosed. Thanks.

πŸ‘︎ 3
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πŸ‘€︎ u/ladylupe82
πŸ“…︎ Sep 30 2020
🚨︎ report
Pulmonary embolism or typical dysautonomia? Blood pressure spike an o2 saturation drop to 88 upon sitting and then normalize a couple minutes later

I want to make sure I’m not being paranoid before I head to the ER. Please give input if you’ve noticed similar.

I’ve been very immobile recently. I’m a new (officially undiagnosed but recognized by docs) pots patient. I was able to dull the symptoms of the racing heart while standing with a beta blocker (it now goes from 35-40 over my resting to 15-20) but severe breathlessness and pressure in my chest ensues. When I wake, I immediately have to take a beta blocker because I feel weird feeling within my chest and I feel oxygen starved. I’ve also began twitching all over, getting extreme pressure headaches that coincide with horrendous forearm and calf pain. I’ve also had bronchial pain along with it that comes and goes along with Gastro issues. Extreme Heat and cold sensitivity. Sometimes I’m sweating and sometimes my feet are ice cubes. I can barely shower without my heart rate and blood pressure shooting to the moon.. ER has been called 6 times in 2 months for hypertensive crisis. I’m a mess, in short.

I got some horrible news yesterday. I was positive for lupus or a lupus like disease according to my doctor (1:40 speckled) he referred me out to a specialist. I told him I’m having issues walking to the bathroom I was previously was running And lifting 2 hours a day/ 5x a week 9 months ago and then I got covid and now I dread tying my shoes.

So I was planning on waiting for the rhumotologist, cardiologist and neurologist to review my physical issues along with my labs but I started to think harder about some things. Every time I’ve been to the doctor recently, my oxygen saturation is low or fluctuating unless they sit and wait a couple of minutes. It usually is as low as 88 for a few seconds and takes a couple minutes of sitting to get up to 98. Same goes for my blood pressure, when I walk to from the waiting room to the back, my blood pressure is pretty high 150/105ish upon sitting and if I have them wait a couple of minutes, it goes down to 110/70. The nurse yesterday expressed great concern. Then I started wondering, is this typical for pots or is this something else that I should go to the ER for like a possible blood clot. Especially with covid I experienced...

I read online that my potential lupus (with a blood clot / pulmonary embolism) could be causing all my pots like symptoms along with hypoxia (vs the pseudo hypoxia I thought I was suffering). This would explain my severe shortness of breath, innability to walk more than a few steps

... keep reading on reddit ➑

πŸ‘︎ 2
πŸ’¬︎
πŸ“…︎ Nov 13 2020
🚨︎ report
Question about pulmonary artery pressure

Can someone explain the difference between it being 10-14 vs 25/10?

Thanks in advance.

https://preview.redd.it/1pi19cbc6ln51.png?width=976&format=png&auto=webp&s=2d5411589aa90bdf6e8b8a231e240cd328b4fb85

πŸ‘︎ 2
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πŸ‘€︎ u/drinknwater
πŸ“…︎ Sep 16 2020
🚨︎ report
[Preclinical] How does intracapillary pulmonary pressure vary during inspiration?

During my last physiology class, the lecturer stated that: "in normal subjects, at the end of maximal inspiration at TPC, although alveolar pressure is equal to atmospheric pressure (with open glottis), arterial and venous pulmonary pressures decrease in parallel with pleural pressure. Therefore, transmural pressure in the pulmonary capillaries decreases, leading to increased RVP." However, I do not understand why this happens, shouldn't the pressure actually increase due to the fact that during inspiration a larger volume of blood arrives in the right heart and thus we should have a higher systolic volume and a higher pressure?

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πŸ‘€︎ u/CHkn1
πŸ“…︎ May 10 2020
🚨︎ report
Elevated pulmonary artery systolic pressure is associated with poor survival of patients with non-small cell lung cancer mdlinx.com/journal-summar…
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πŸ‘€︎ u/montaukwhaler
πŸ“…︎ Jul 29 2020
🚨︎ report
uneven saddle pressure = cleat wedges?

Hi All - when I ride, I often feel like I'm sitting more on the right side of the saddle than the left. I have had confirmation that I don't have a leg length discrepancy so no need to go down that path - but I'm wondering, should I wedge or lift the cleat on the right side to help even things out? I'm pretty sure I'm more flexible on one side vs. the other as well - and that might be part of the problem - but just wondering if there was a fitting solution. Thanks!

πŸ‘︎ 3
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πŸ‘€︎ u/pxt0909
πŸ“…︎ Jan 04 2021
🚨︎ report
Possible wedge pattern forming. No major price fluctuations above or below S & R . I do believe buying pressure will continue around the $6 range until that breakout occurs.
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πŸ‘€︎ u/ghost_901
πŸ“…︎ Feb 06 2021
🚨︎ report
High blood pressure after pulmonary vein repair?

My wife(55F)(smoker)had part of her lungs removed for biopsy purposes. She is a breast cancer survivor. During the biopsy surgery, the surgeon nicked her pulmonary vein. It had to be repaired twice. Once during the orginal surgery and then again a short while later. The first repair didn't hold and she almost bled out (she was given seven units of blood during the second repair).

Prior to this surgery she had perfect to low blood pressure. Ever since this surgery she has had high blood pressure to the point that she has had to start taking medication for it. Her primary Dr says that the pulmonary vein repair would have no affect on her BP, but we are both very sceptical. Would love to know what other Dr's think.

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πŸ‘€︎ u/whiteboyskrazy
πŸ“…︎ Jan 23 2020
🚨︎ report
According to a 2007 study N-acetylcysteine can form a red blood cell-derived molecule that makes blood vessels think they are not getting enough oxygen. This leads to pulmonary arterial hypertension, a serious condition characterized by high blood pressure in arteries that carry blood to the lungs sciencedaily.com/releases…
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πŸ‘€︎ u/Reddywesty
πŸ“…︎ Aug 20 2019
🚨︎ report
Why does the central venous pressure (CVP) rise when having a pulmonary embolism?

Hi all, I am a medical student preparing for my exam in heart/lung physiology.

In one of the older exam papers I am using in preparation for my upcoming exam, it states that a pulmonary embolism will result in the CVP going up (which will lower the amount of venous blood flowing into the right atrium). It does not explain why this happens, and I am having trouble finding information on the internet (english is not my main language, and I could not find anything in my own language).

If anyone could explain to me why this happens it would be really awesome. Thank you in advance.

πŸ‘︎ 30
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πŸ‘€︎ u/YeahBishMagnets
πŸ“…︎ Jul 23 2019
🚨︎ report
UW 11780: Pulmonary Artery vs PCPW for LA Pressure?

Can someone explain this, I need clarification on the explanation?

I was under the impression PCPW approximates LA pressure... but, this vignette talks about a balloon catheter inflating in the pulmonary artery approximating LA pressure.

I'm confused because doesn't the pulmonary artery exit the RV and go to the lungs?

πŸ‘︎ 2
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πŸ‘€︎ u/lowfigh
πŸ“…︎ Dec 16 2019
🚨︎ report
Cardiologist told my mom she can eat anything, she (74) has high blood pressure, copd (had pulmonary edema), just discharged after having triple bypass CABG, still have blockahes in corotid artery. Why would they not tell her to restrict sodium and cholesterol?

She thinks she can eat fried chicken and hot dogs everyday. Ignoring doctors and a terrible diet and smoking is what put her in this mess. Why would this doctor tell her this??

πŸ‘︎ 5
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πŸ“…︎ Aug 22 2019
🚨︎ report
So just got back from my Pulmonologist and he told me my echocardiogram shows a pressure of 49 and suspects I have Pulmonary Hypertension. He is going to do another echo in 6 months to see if this is because of my PE in October. Anyone else in the same boat??
πŸ‘︎ 2
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πŸ‘€︎ u/jaxdavishka
πŸ“…︎ Dec 11 2019
🚨︎ report
[High School Biology: (blood) circulation] Why is blood pressure lower in the pulmonary circulation?

So there is the same amount of blood in the pulmonary system as in the systemic one. The size of the pulmonary seems to be smaller, so I thought that more blood in a smaller system = more pressure. But my book says otherwise. Can someone explain this?

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πŸ‘€︎ u/_Nothing_Unusual_
πŸ“…︎ Dec 09 2019
🚨︎ report
So yeah I made a new Heavy Launch rocket with a crawler...the bad news is that the rocket rolled out of the launchpad and exploded of too much pressure ANDDD I fired the engines while I was on the wedge. and this happened reddit.com/gallery/k70hw6
πŸ‘︎ 7
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πŸ‘€︎ u/Laex_1_1
πŸ“…︎ Dec 05 2020
🚨︎ report
[Article] Non‐invasive positive pressure ventilation (CPAP or bilevel NPPV) for cardiogenic pulmonary oedema Nicolas Berbenetz, Yongjun Wang, James Brown, Charlotte Godfrey, Mahmood Ahmad, FlΓ‘via MR Vital, Pier Lambiase, Amitava Banerjee, Ameet Bakhai, Matthew Chong

Title: Non‐invasive positive pressure ventilation (CPAP or bilevel NPPV) for cardiogenic pulmonary oedema

Authors: Nicolas Berbenetz, Yongjun Wang, James Brown, Charlotte Godfrey, Mahmood Ahmad, FlΓ‘via MR Vital, Pier Lambiase, Amitava Banerjee, Ameet Bakhai, Matthew Chong

DOI: https://doi.org/10.1002/14651858.
URL: https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD005351.pub4/full

πŸ‘︎ 3
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πŸ‘€︎ u/r_o_r
πŸ“…︎ Apr 06 2019
🚨︎ report
[Article] Postobstructive negative pressure pulmonary oedema in a dog

DOI: 10.1136/vetreccr-2019-000892

URL

πŸ‘︎ 2
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πŸ‘€︎ u/ap0kalyps
πŸ“…︎ Nov 07 2019
🚨︎ report
Army Research Lab's experimenting with screw-locking with tapered-wedge extractors and higher pressure propellant thedrive.com/the-war-zone…
πŸ‘︎ 225
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πŸ‘€︎ u/tshiar
πŸ“…︎ Dec 25 2019
🚨︎ report
Negative pressure pulmonary edema with narcan use ncbi.nlm.nih.gov/pmc/arti…
πŸ‘︎ 10
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πŸ‘€︎ u/TrauMedic
πŸ“…︎ Sep 19 2018
🚨︎ report
Drastic oxygen saturation drop and blood pressure spike when initially sitting down (then it normalizes)- Typical pots or possibly a blood clot/ pulmonary embolism?

I want to make sure I’m not being paranoid before I head to the ER. Please give input if you’ve noticed similar.

I’ve been very immobile recently. I’m a new (officially undiagnosed but recognized by docs) pots patient. I was able to dull the symptoms of the racing heart while standing with a beta blocker (it now goes from 35-40 over my resting to 15-20) but severe breathlessness and pressure in my chest ensues. When I wake, I immediately have to take a beta blocker because I feel weird feeling within my chest and I feel oxygen starved. I’ve also began twitching all over, getting extreme pressure headaches that coincide with horrendous forearm and calf pain. I’ve also had bronchial pain along with it that comes and goes along with Gastro issues. Extreme Heat and cold sensitivity. Sometimes I’m sweating and sometimes my feet are ice cubes. I can barely shower without my heart rate and blood pressure shooting to the moon.. ER has been called 6 times in 2 months for hypertensive crisis. I’m a mess, in short.

I got some horrible news yesterday. I was positive for lupus or a lupus like disease according to my doctor (1:40 speckled) he referred me out to a specialist. I told him I’m having issues walking to the bathroom I was previously was running And lifting 2 hours a day/ 5x a week 9 months ago and then I got covid and now I dread tying my shoes.

So I was planning on waiting for the rhumotologist, cardiologist and neurologist to review my physical issues along with my labs but I started to think harder about some things. Every time I’ve been to the doctor recently, my oxygen saturation is low or fluctuating unless they sit and wait a couple of minutes. It usually is as low as 88 for a few seconds and takes a couple minutes of sitting to get up to 98. Same goes for my blood pressure, when I walk to from the waiting room to the back, my blood pressure is pretty high 150/105ish upon sitting and if I have them wait a couple of minutes, it goes down to 110/70. The nurse yesterday expressed great concern. Then I started wondering, is this typical for pots or is this something else that I should go to the ER for like a possible blood clot. Especially with covid I experienced...

I read online that my potential lupus (with a blood clot / pulmonary embolism) could be causing all my pots like symptoms along with hypoxia (vs the pseudo hypoxia I thought I was suffering). This would explain my severe shortness of breath, innability to walk more than a few steps

... keep reading on reddit ➑

πŸ‘︎ 2
πŸ’¬︎
πŸ“…︎ Nov 13 2020
🚨︎ report

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