1. All veins have one way valves which prevent back flow 2. Two systems of veins (superficial and deep) Deep veins are inside muscle so when muscle contract high pressure is imposed on the deep vein which propels them back to the RA. Superficial veins usually feed into deep veins. Lack of muscle contraction could cause DVT (Stasis of blood leads to thrombus which travels in to RA then into lungs where it leads to a pulmonary embolism) 3. Varicose veins: when valves fail blood regurgitates from deep back into superficial and keeps back flowing as more valves fail. Keep muscle active, but some component is genetic
for me, it's equally important to have someone with a clear speaking voice explaining each lecture. Dr. John Campbell has a great voice for this. Coupled with his knowledge, I am learning better here then in class... ;)
So well explained....I am not from medical discipline but I do watch the videos related with the medical discipline...and Dr. Jhon I have found your videos to be so explanatory that I regularly watches your lectures...simple, clear and understandable lectures indeed...
thank you so much for this information. please continue with the information as i am now seeing varicose veins that are moon shape in my thighs. i conveyed this to my regular doctor and she said i should see a vascular doctor. not enough information is given about this topic. i see many females particularly that have problems with veins and valves.
Did you mention SUCTION? Yep. Newly discovered relatively, or newly recognized, there is an actual UPDRAFT in the secondary cycle. The blood is not left with zero pressure from above, but with negative pressure, assisting or assisted from positive pressure by musculature of the calf and thigh - but it really a good question, isn't it. And it raises additional questions about venous disease progression, which cascades suddenly from simple edema and lack of reversal treatment - which by its nature must be a home medicine. And many other factors of blood, muscle, posture, and medicinals in therapy.
One thing I don’t get- how is venous return equal to cardiac output with so much lower pressures? Also, if muscles are not contracting, does cardiac output have to decrease since venous would decrease?
Venous return. Can an injury flare up and accompanying inflammation cause this? If so, could this set off a veritable flood of sweating and a tingling, fizzing sensation?
but sir, while walking the muscles are contracted and relaxed causing veins to draw blood towards Inferior vena cava. but while sleeping there is no muscle activity in out muscles and what causes the blood to go forward towards heart.
While sleeping or even in lying down postion....effect of gravity is greatly reduced.....so not much effort is needed to send it to right heart...got it??
I wish there was something simple I could tell you SRP, but what you have told me are just descriptions, so there is nothing I can specifically say. The most important thing is to see a local specialist doctor who will be able to assess you on n individual basis. Have you done this? I wish you well.
1. All veins have one way valves which prevent back flow 2. Two systems of veins (superficial and deep) Deep veins are inside muscle so when muscle contract high pressure is imposed on the deep vein which propels them back to the RA. Superficial veins usually feed into deep veins. Lack of muscle contraction could cause DVT (Stasis of blood leads to thrombus which travels in to RA then into lungs where it leads to a pulmonary embolism) 3. Varicose veins: when valves fail blood regurgitates from deep back into superficial and keeps back flowing as more valves fail. Keep muscle active, but some component is genetic
1. All veins have one way valves which prevent back flow
2. Two systems of veins (superficial and deep) Deep veins are inside muscle so when muscle contract high pressure is imposed on the deep vein which propels them back to the RA. Superficial veins usually feed into deep veins. Lack of muscle contraction could cause DVT (Stasis of blood leads to thrombus which travels in to RA then into lungs where it leads to a pulmonary embolism)
3. Varicose veins: when valves fail blood regurgitates from deep back into superficial and keeps back flowing as more valves fail. Keep muscle active, but some component is genetic
Sounds good
for me, it's equally important to have someone with a clear speaking voice explaining each lecture. Dr. John Campbell has a great voice for this. Coupled with his knowledge, I am learning better here then in class... ;)
you are an absolutely legend. Thank you for sharing your knowledge in the most perspicacious manner.
Have been watching for just two minutes and can tell this is the best explaination m ever going to get😇😇 thanks for sharing
Amazing! You make it so simple and logical!
Wow!! great job Dr. Campbell.
thanku so much now i got the real mech behind dvt nd physiology of calf muscle pump...... best wishes
Doing a biology degree, you give me such a better understanding then most of my lecturers!
I think i didn't close my mouth during the whole video. What a fascinating video, thank you for this.
So well explained....I am not from medical discipline but I do watch the videos related with the medical discipline...and Dr. Jhon I have found your videos to be so explanatory that I regularly watches your lectures...simple, clear and understandable lectures indeed...
Thank you, I really enjoy your teaching
Thank you very very much. An AWESOME explanation :)
important medical concept, thank you...
Amazing! Thank you!
fantastic prof.Thank u for ur understandable videos. U are the best tecer i think.
Great video, thnx so much from a physio student
Thank you sir !
Thanks Doctor:)
Well explained :) Thank you!
great explanation, thanks.
this video changed my life and allowed me to cure my mums quadrilateralitateral cancerous boils
omg big pp
Thank you so much Doc, all of your videos are excellent and easy to follow and understand.
Thanks, do click some 'likes', this really helps the channel to grow.
Thank you!
Great video!
Fantastic explanation. Thank you.
Coco1Lucy how are yiu
Well explained!!! Thank you very much
Dr. Thank you
thank you so much for this information. please continue with the information as i am now seeing varicose veins that are moon shape in my thighs. i conveyed this to my regular doctor and she said i should see a vascular doctor. not enough information is given about this topic. i see many females particularly that have problems with veins and valves.
You should also make a video on congestive heart failure... Thanks in anticipation
Outstanding
Did you mention SUCTION? Yep. Newly discovered relatively, or newly recognized, there is an actual UPDRAFT in the secondary cycle. The blood is not left with zero pressure from above, but with negative pressure, assisting or assisted from positive pressure by musculature of the calf and thigh - but it really a good question, isn't it. And it raises additional questions about venous disease progression, which cascades suddenly from simple edema and lack of reversal treatment - which by its nature must be a home medicine. And many other factors of blood, muscle, posture, and medicinals in therapy.
Thanks Dr Campbell, excellent explanation, can you please tell me which physiology book I can get this information from ?
You can order my Physiology Notes book from campbellteaching.co.uk
Thank you
Eman. S. how are you
thanks
Dr john Campbell sir very informative feedback as always in your videos thanks 12/06/2022
Does gravity support venous return to the heart? (Concerning the return of blood from upper body and superior vena cava to the heart)
One thing I don’t get- how is venous return equal to cardiac output with so much lower pressures? Also, if muscles are not contracting, does cardiac output have to decrease since venous would decrease?
Thank you Sir
Venous return. Can an injury flare up and accompanying inflammation cause this?
If so, could this set off a veritable flood of sweating and a tingling, fizzing sensation?
Ma sha allah
Dr the link of your book in the previous comments isn’t working could you sent me the link .
campbellteaching.co.uk
but sir, while walking the muscles are contracted and relaxed causing veins to draw blood towards Inferior vena cava.
but while sleeping there is no muscle activity in out muscles and what causes the blood to go forward towards heart.
While sleeping or even in lying down postion....effect of gravity is greatly reduced.....so not much effort is needed to send it to right heart...got it??
@@capitalistcommie6846 but still it needs some effects right? What muscles does that job?
What happens if someone's leg gets cut off
colateral circulation develops
Can you explain collateral circulation further
I suffer with Vascular Malformation Venous Malformation and Muscular Malformation. Can you help me Dr ?
I wish there was something simple I could tell you SRP, but what you have told me are just descriptions, so there is nothing I can specifically say. The most important thing is to see a local specialist doctor who will be able to assess you on n individual basis. Have you done this? I wish you well.
Dr. John Campbell wonderfull
1. All veins have one way valves which prevent back flow
2. Two systems of veins (superficial and deep) Deep veins are inside muscle so when muscle contract high pressure is imposed on the deep vein which propels them back to the RA. Superficial veins usually feed into deep veins. Lack of muscle contraction could cause DVT (Stasis of blood leads to thrombus which travels in to RA then into lungs where it leads to a pulmonary embolism)
3. Varicose veins: when valves fail blood regurgitates from deep back into superficial and keeps back flowing as more valves fail. Keep muscle active, but some component is genetic
I have put this on the video comments for all to see, if you are happy with this?
@@Campbellteaching For sure if you think it will be useful.