Venous blood pressure and the role of muscle pumps
Rot=Arterien/Blau=Venen
1. Introduction
Rot=Arterien/Blau=Venen
Blood pressure is usually considered in relation to the arteries. However, it is less well known that pressure also exists within the venous system. This so-called venous blood pressure plays a crucial role in returning blood to the heart.
2. What is venous blood pressure?
Venous blood pressure describes the pressure inside the veins. It is much lower than arterial blood pressure. Typical values are - depending on where they are measured - between a few millimeters of mercury (mmHg) in veins near the heart and about 10-15 mmHg in the leg veins when standing.
The blood has now essentially completed the arterial half of the circulation, delivering oxygen and nutrients where they are needed. The venous part of the circulatory system provides the return path to the heart. Several factors work together to move the blood back. One is the suction effect of the heart during diastole, the relaxation phase when the heart fills with blood again. This is supported in the chest by breathing and the associated downward movement of the diaphragm. In addition, most larger veins in the arms, legs and abdominal wall have so-called venous valves. These prevent blood from flowing backward. Unfortunately, these venous valves are often only known because, when they do not function or no longer function, they contribute to the development of varicose veins. They are supported by the muscle pumps. This term refers to the external support the venous system receives in transporting blood from the muscles surrounding the veins in the arms and especially the legs.
The blood has now essentially completed the arterial half of the circulation, delivering oxygen and nutrients where they are needed. The venous part of the circulatory system provides the return path to the heart. Several factors work together to move the blood back. One is the suction effect of the heart during diastole, the relaxation phase when the heart fills with blood again. This is supported in the chest by breathing and the associated downward movement of the diaphragm. In addition, most larger veins in the arms, legs and abdominal wall have so-called venous valves. These prevent blood from flowing backward. Unfortunately, these venous valves are often only known because, when they do not function or no longer function, they contribute to the development of varicose veins. They are supported by the muscle pumps. This term refers to the external support the venous system receives in transporting blood from the muscles surrounding the veins in the arms and especially the legs.
Measurement
Venous blood pressure is measured as central venous pressure via a central venous catheter (CVC) that is inserted into one of the large body veins. The pressure roughly corresponds to that in the right atrium of the heart. It is usually between 1-9 mmHg. This measurement is particularly relevant during certain treatments in hospital. Besides measuring central venous pressure, a CVC can also be used to give medications and infusions.
3. Differences between arterial and venous blood pressure
While arterial blood pressure ensures that oxygen-rich blood is pumped from the heart into the body, venous blood pressure describes the conditions under which blood flows back to the heart.
- Arterial blood pressure: Higher values (at rest about 120/80 mmHg), driving blood supply to the organs.
- Venous blood pressure: Lower values, crucial for the return flow to the heart.
Both systems are inseparably linked: only when blood returns to the heart can it, after passing through the pulmonary circulation, be pumped back into the body through the arteries.
4. The muscle pump: an important aid
A special feature of venous return is that it must work against gravity – especially from the legs, but also from the arms. The so-called muscle pumps play an important role here. The most important and best-known is the calf muscle pump. However, the muscles in the foot and thigh, as well as those in the arms, also perform this task. The calf muscle pump is activated mainly when walking, running or climbing stairs.
- Anatomical basis: Many large veins in the arms and legs contain venous valves that act like one-way valves and prevent blood from flowing back down.
- Function: When you walk or tense your muscles, the veins are compressed. Blood is pushed upward toward the heart while the valves prevent backflow.
- Importance: Muscle pump activity supports the veins from the outside and thus helps return blood to the heart.
5. Importance of venous blood pressure for health
Healthy venous blood pressure, intact venous valves and a well-trained calf muscle pump are important for the smooth return of blood to the heart. Problems arise if, for example, right-sided heart failure is present. In this case, the heart cannot pump enough blood into the pulmonary circulation. Blood then backs up in the venous system, causing venous blood pressure to rise. This can lead to oedema, i.e. fluid retention, in the legs and, in more severe cases, also in the abdomen. The liver is sometimes affected as well. Congestion may also be visible in the jugular veins.
If the venous valves in the legs are damaged and the muscle pump does not work sufficiently due to a lack of exercise, this can lead to symptoms such as heavy legs and varicose veins, or even chronic venous insufficiency. Varicose veins increase the risk of thrombosis (blood clots) in both the superficial veins (SVT) and the deep veins (DVT). Superficial vein thromboses are generally not life-threatening, but they can develop into deep vein thrombosis. This is much more dangerous because the blood clot can break loose and cause a life-threatening pulmonary embolism.
If the venous valves in the legs are damaged and the muscle pump does not work sufficiently due to a lack of exercise, this can lead to symptoms such as heavy legs and varicose veins, or even chronic venous insufficiency. Varicose veins increase the risk of thrombosis (blood clots) in both the superficial veins (SVT) and the deep veins (DVT). Superficial vein thromboses are generally not life-threatening, but they can develop into deep vein thrombosis. This is much more dangerous because the blood clot can break loose and cause a life-threatening pulmonary embolism.
6. Research and open questions
It is well established that physical activity and a functioning (calf) muscle pump promote the return of blood. It is less clear to what extent different types of exercise improve venous function in the long term. The role of genetic factors in venous diseases is also still being researched. Overall, there is agreement that venous blood pressure is a dynamic system affected by posture, activity and individual predisposition.
7. Practical tips for everyday life
- Exercise: Regular walking, cycling or swimming activate the muscle pumps.
- Avoid long periods of sitting or standing: Short movement breaks help keep blood flowing in the legs.
- Elevate your legs: Helps venous return.
- Compression stockings: May be medically useful if you tend to have weak veins.
8. Conclusion
Venous blood pressure is an important part of the circulatory system, even if it is less well known than arterial blood pressure. The calf muscle pump does indispensable work, especially for returning blood from the legs. An active lifestyle is crucial to maintain venous function and help prevent disease.
This article is from Tensana – the leading app since 2011, helping hundreds of thousands of people monitor their blood pressure every day.
Our content is based on carefully researched, evidence-based data and is continuously updated (as of 08/2025).
Author Horst Klier has been closely involved with high blood pressure since 2002 – initially because he was personally affected and, since 2009, as the developer of Tensana – and is now regarded as a recognized blood pressure expert thanks to his app and specialist platform, used millions of times, as well as his numerous publications. As the author of several health guides and specialist articles, he communicates complex knowledge in a clear and practical way.
Author Horst Klier has been closely involved with high blood pressure since 2002 – initially because he was personally affected and, since 2009, as the developer of Tensana – and is now regarded as a recognized blood pressure expert thanks to his app and specialist platform, used millions of times, as well as his numerous publications. As the author of several health guides and specialist articles, he communicates complex knowledge in a clear and practical way.
