A computational model of myocardial microcirculation including interstitial flow.

Area of Science:

• Cardiovascular Physiology
• Biomedical Engineering
• Computational Biology

Background:

• Interstitial fluid (ISF) flow's role in myocardial microcirculation is poorly understood.
• Direct measurement of ISF flow in the heart is challenging.
• Understanding ISF flow is vital for comprehending myocardial function and disease.

Purpose of the Study:

• To analyze the contribution of interstitial fluid flow to myocardial microcirculation.
• To develop a computational model incorporating ISF flow.
• To simulate ISF flow effects under normal and hypoperfusion conditions.

Main Methods:

• Developed a computational model of myocardial microcirculation.
• Integrated convection due to ISF flow into an existing model.
• Performed simulations varying ISF flow rates in normal and hypoperfusion states.

Main Results:

• ISF flow significantly contributes to microcirculation only when capillary flow is low.
• Simulations indicated a potential compensatory role for ISF flow in oxygen delivery.
• The model highlights ISF flow's importance under conditions of reduced blood supply.

Conclusions:

• Interstitial fluid flow plays a role in myocardial microcirculation, particularly under low flow conditions.
• ISF flow may partially compensate for reduced oxygen supply during ischemia.
• Computational modeling is a valuable tool for studying microcirculatory dynamics.