New and simplified method for multiple left ventricle catheterizations in small animals.

Area of Science:

• Cardiovascular Research
• Animal Models
• Surgical Procedures

Background:

• Ventricular catheterization in rats is a common procedure.
• Current methods are limited to a single use, introducing variability.
• Inter-individual variability can affect study outcomes.

Purpose of the Study:

• To assess the safety and reproducibility of repeated ventricular catheterization in rats.
• To evaluate the suitability of this technique for longitudinal studies.
• To minimize statistical error caused by inter-individual variability.

Main Methods:

• Six Fischer rats underwent left ventricular catheterization via the right carotid artery.
• The procedure was repeated seven days later via the left carotid artery.
• Volume and pressure data were acquired to construct pressure-volume loops; neurological and anatomical outcomes were evaluated.

Main Results:

• No major neurological alterations were observed in any animals.
• One animal experienced Horner syndrome; one case of left ventricle perforation was noted.
• The procedure proved safe, easy, and reproducible for repeat use.

Conclusions:

• Repeated ventricular catheterization in rats is a safe and reproducible technique.
• This method is suitable for longitudinal studies, reducing inter-individual variability.
• The procedure allows for serial data acquisition in the same animal without significant adverse effects.