Myocardial Slices: an Intermediate Complexity Platform for Translational Cardiovascular Research

Area of Science:

• Cardiovascular Science
• In Vitro Models
• Translational Research

Background:

• Myocardial slices (cardiac tissue slices) are ultrathin sections of living adult ventricular myocardium.
• They maintain native heart multicellularity, architecture, and physiology.
• Their thinness facilitates oxygen and metabolic substrate diffusion in vitro.

Purpose of the Study:

• To compare myocardial slices to other in vitro models.
• To highlight the advantages of myocardial slices for cardiovascular research.
• To discuss optimized preparation methods and applications.

Main Methods:

• Preparation of ultrathin myocardial slices using a high-precision vibratome.
• Production of slices from various animal models and human biopsies.
• Optimization of preparation to minimize cardiomyocyte damage and preserve function.

Main Results:

• Optimized methods yield highly viable myocardial slices with minimal cardiomyocyte damage (2-3%).
• Preserved structure and function in slices from both large and small mammalian hearts.
• Successful application in investigating cardiac multicellularity, vascular networks, and biomaterial effects.

Conclusions:

• Myocardial slices represent a valuable intermediate-complexity in vitro platform for translational cardiovascular research.
• They are suitable for basic science investigations, pharmacological testing, and studying cardiac physiology.
• Further development can address current challenges and expand future applications.