A closed-chest canine model for cross-sectional echocardiographic study

Area of Science:

• Veterinary Cardiology
• Diagnostic Imaging
• Animal Physiology

Background:

• Cross-sectional echocardiography in intact dogs is challenging due to lung interference.
• Prior canine cardiac echo studies required invasive methods like implanted transducers or open-chest surgery.

Purpose of the Study:

• To present a novel pericardial cradle technique for improved echocardiography in closed-chest dogs.
• To establish a non-invasive acoustic window for comprehensive canine cardiac imaging.

Main Methods:

• A pericardial cradle technique was developed, securing the pericardium to the thoracic wall.
• This technique retains the left lung, creating an acoustic window for echocardiography.
• Real-time cross-sectional echocardiographic studies were performed on 52 anesthetized dogs.

Main Results:

• The pericardial cradle technique successfully provided an acoustic window for imaging the entire heart.
• This method demonstrated advantages over previous invasive echocardiographic preparations in dogs.
• Video recording allowed for detailed frame-by-frame analysis of cardiac structures.

Conclusions:

• The pericardial cradle technique is an effective method for closed-chest echocardiography in dogs.
• This approach overcomes limitations posed by lung tissue, enabling comprehensive cardiac visualization.
• The technique offers a less invasive and advantageous alternative for canine cardiac imaging research.