CIRCULATION EDUCATION
Circulation: How Blood Flow Supports the Body
Circulation connects the heart, lungs, blood vessels, and tissues. Understanding that route makes it easier to ask a more useful next question.
The route blood takes through the body
Circulation is the continuous movement of blood between the heart, lungs, and body tissues. The heart provides the pumping force. Arteries carry blood away from the heart, veins return it, and capillaries are the small vessels where exchange with tissues occurs.[1][2]
Pulmonary circulation carries blood between the right side of the heart and the lungs for gas exchange. Systemic circulation carries oxygen-rich blood from the left side of the heart through the body and returns blood to the right side of the heart.[1][2]
Why circulation questions can have different answers
The same everyday phrase can describe different questions. A concern about leg discomfort, chest symptoms, breathlessness, a heart rhythm, or a slow-healing wound can involve different parts of the cardiovascular system and needs different clinical context.[1][2]
A useful educational starting point is to separate what is being noticed from what could be contributing, whether a known condition is involved, and what information may help a healthcare professional evaluate the question.[1]
CLAIM 1 — STRONG
EECP improves circulation through timed counterpulsation
Enhanced external counterpulsation (EECP), also called external counterpulsation (ECP), is a noninvasive, ECG-timed cuff therapy.
Enhanced external counterpulsation, or EECP, uses heartbeat-timed cuffs that inflate sequentially during diastole and release before systole. Published physiology describes diastolic augmentation, increased venous return, and systolic unloading as part of this circulation mechanism.[5][6]
In a randomized sham-controlled study in chronic angina, a course of EECP improved brachial and femoral artery flow-mediated dilation and changed measured nitric-oxide-related markers compared with sham treatment. Those are therapy-level circulation findings in the population studied; condition-specific evidence belongs on the relevant condition page.[4]
WHEN TO ACT NOW
Emergency symptoms need emergency care
Call 911 or the local emergency number for severe chest pain, severe difficulty breathing, stroke symptoms, severe bleeding, unconsciousness, or another immediate emergency.[3]
CONTINUE LEARNING
Choose the next useful educational step.
COMMON QUESTIONS
Frequently asked questions
REFERENCES
Sources
- National Heart, Lung, and Blood Institute: How Blood Flows through the Heart
- InformedHealth.org: In Brief—How Does the Blood Circulatory System Work?
- American Heart Association: When to Call 911
- Braith et al.: Enhanced External Counterpulsation Improves Peripheral Artery Flow-Mediated Dilation
- Michaels et al.: Intracoronary pressure and Doppler flow during EECP
- Sharma et al.: The Role of Enhanced External Counter Pulsation Therapy in Clinical Practice