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Immersive training in cardiology : focus on coronary obstructions surgery process with virtual reality


par Adéfêmi Marie-Adelphe AGUESSY
Université d' Abomey-Calavi , Bénin - Licence 2025
  

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Abstract

Training in interventional cardiology is a major challenge in preparing medical students and young surgeons in Benin. Virtual reality (VR) is now emerging as an innovative technology which offers new educational opportunities in this field. Our study is part of this dynamic and proposes the design and development of an immersive VR software, called CardioTrain, dedicated to the simulation of coronary revascularisation procedures, in particular coronary angioplasty (PCI) and coronary artery bypass grafting (CABG). The software allows users to navigate a virtual operating theatre, manipulate surgical instruments and follow either a guided course or an autonomous mode. This approach promotes the gradual acquisition of technical skills, familiarisation with surgical equipment and a better understanding of the mechanisms involved in coronary obstructions. The solution was developed using tools such as Blender for 3D modelling, Unity for interactive implementation, and a customised SDK for VR integration. Tests confirmed the prototype's viability. Through this work, we believe we are making an innovative contribution to medical training in Benin by setting up an accessible, immersive and scalable tool that could ultimately enrich teaching practices and improve the quality of learning in interventional cardiology.

Key words: virtual reality, interventional cardiology, angioplasty, coronary artery bypass grafting, medical training.

Résumé

La formation en cardiologie interventionnelle représente un enjeu majeur pour la préparation des étudiants en médecine et des jeunes chirurgiens au Bénin. La réalité virtuelle (RV) s'impose au-jourd'hui comme une technologie innovante offrant de nouvelles perspectives pédagogiques dans ce domaine. Notre étude s'inscrit dans cette dynamique et propose la conception et le développement d'une application immersive en RV, nommée CardioTrain, dédiée à la simulation des interventions de revascularisation coronarienne, notamment l'angioplastie coronaire (PCI) et le pontage aorto-coronarien (CABG). L'application permet à l'utilisateur d'évoluer dans un bloc opératoire virtuel, de manipuler des instruments chirurgicaux et de suivre soit un parcours guidé, soit un mode autonome. Cette approche favorise l'acquisition progressive des compétences techniques, la familiarisation avec le matériel opératoire et une meilleure compréhension des mécanismes liés aux obstructions coronaires. Le développement de la solution s'est appuyé sur des outils tels que Blender pour la modélisation 3D, Unity pour l'implémentation interactive et un SDK adapté pour l'intégration VR. Les tests réalisés ont confirmé la viabilité du prototype. À travers ce travail, nous estimons apporter une contribution innovante dans le domaine de la formation médicale au Bénin, en proposant un outil accessible, immersif et évolutif, qui pourrait à terme enrichir la pratique pédagogique et améliorer la qualité de l'apprentissage en cardiologie interventionnelle.

Mots clés : réalité virtuelle, cardiologie interventionnelle, angioplastie, pontage aorto-coronarien, formation médicale.

vi

List of Figures

1.1

Coronary arteries

5

1.2

Touch Surgery (by Medtronic)

10

1.3

WebSurg home interface

10

1.4

Surgery Squad home interface

11

1.5

VCSim3 complete set-up including the simulator software running on the laptop, VSP haptic device, fluoroscopic view console, balloon inflation device, and contrast injec-

 
 

tion syringe

14

1.6

Screen captures from the virtual reality-extracorporeal circulation (VR-ECC) simulator, featuring from left-to-right: adjustment of the venous occluder (A), removal of the a clamp from the arterial line (B), an overview of the heart-lung machine (C), and the

 
 

menu system by which users navigate through the simulation (D).

15

1.7

home page of the official vCathlab website

15

1.8

Image courtesy of Osso VR.

16

 

2.1

Use case diagram

19

2.2

Sequence diagram for the use case "Simulate surgery on an obstructed heart"

20

2.3

Operating room design in Blender

22

2.4

Using the Unity3D engine to create the VR experience

22

2.5

Script for animating the user's hands written in Visual Studio 2017

23

2.6

Adobe Illustrator interface screenshot

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3.1

CardioTrain Logo

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3.2

CardioTrain Color Palette

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3.3

CardioTrain logo variations

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3.4

A few examples of the logo in use

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3.5

Home interface

29

3.6

Selecting and choosing an instrument

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3.7

Assisted CABG

30

3.8

some 3D operating room exploration screenshots

30

3.9

some 3D hearts exploration screenshots

31

 

List of Tables

vii

1.1 Comparison of VR Solutions for Cardiology Training 16

viii

List of Acronyms

AR :

Augmented Reality 11, 22, 23,

CABG :

Coronary Artery Bypass Grafting 7, 9, 18, 32,

CAD:

Coronary Artery Disease 4-6,

CardioTrain :

A platform that supports practical training in the treatment of coronary obstructions iv, 26-28,

CVDs :

Cardiovascular diseases 4,

MR :

Mixed Reality 11,

NSTEMI :

Non-ST-Elevation Myocardial Infarction 6,

PCI :

Percutaneous Coronary Intervention 6, 7, 18, 32,

STEMI:

ST-Elevation Myocardial Infarction 6,

UML :

Unified Modeling Language 19,

VR :

Virtual Reality iv, vii, 4, 12-17, 19, 20, 22-25, 32, 39,

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Glossary

AR : Immersive technology which overlays digital content onto the

real-world environment. viii

CABG : also known as coronary bypass surgery, it's a surgical procedure

that restores normal blood flow to the heart by creating new pathways around narrowed or blocked coronary arteries. viii

CAD: common type of heart disease which affects the main blood ves-
sels that supply blood to the heart, called the coronary arteries. viii

CardioTrain : This is the name of our virtual reality software that supports practical training in the treatment of coronary obstructions. viii

CVDs : are a group of disorders of the heart and blood vessels and in-
clude coronary heart disease, cerebrovascular disease, rheumatic heart disease and other conditions. viii

MR : Immersive technology which combines real and virtual environ-

ments with real-time interaction between physical and digital objects.. viii

NSTEMI : It's a type of heart attack where a coronary artery is partially

blocked, reducing but not completely cutting off the blood supply to part of the heart muscle. viii

STEMI: It's a severe type of heart attack where a major coronary artery

is completely blocked, cutting off blood supply to a significant portion of the heart muscle. viii

UML : It is a pictogram-based graphical modelling language designed

as a standardised method of visualisation in the fields of software development and object-oriented design. viii

Glossary Glossary

1

VR : Immersive technology with a fully immersive environments where users are completely cut off from the physical world. viii

2

General introduction

Cardiovascular diseases (CVDs) are the leading cause of death globally, taking an estimated 17.9 million lives each year [10], particularly in developing countries. Among them, coronary artery disease, caused by coronary artery obstruction, represents a critical pathology that requires rapid and precise management. While cardiology education in medical training programs, including in Benin, provides students with solid knowledge, their first hands-on interventions often occur directly on human patients, a situation likely to generate stress and uncertainty during initial clinical procedures. To mitigate these challenges and provide a safer, more controlled learning environment, immersive technologies such as virtual reality have emerged as a promising solution. By recreating complex clinical environments in a safe, interactive, and reproducible way, virtual reality offers an ideal framework for progressive skill acquisition. This is the background to our project: to develop a virtual reality training tool dedicated to the acquisition of skills linked to the treatment of coronary obstructions.

Problem statement

The progressive acquisition of initial practical skills in cardiology, including in contexts such as Benin, represents a key stage before students perform their first real interventions on patients. In this context, immersive technologies offer promising opportunities to enrich this stage, which raises the following central question: how can an immersive virtual reality application be designed to effectively support the progressive development of cardiology students' practical competencies, particularly in the treatment of coronary artery disease?

Objectives

The general objective of this thesis is to develop an immersive virtual reality application designed to train healthcare professionals in the management of cardiovascular diseases, in particular coronary artery obstructions. The specific objectives of this thesis are:

· Provide an interactive environment for learning cardiac anatomy and medical procedures;

· Reinforce clinical skills through simulations based on real cases;

· Support medical decision-making between procedures such as coronary artery bypass grafting

Glossary Glossary

3

and revascularisation;

· Design a scalable software architecture that will enable the application to be extended to other medical specialities.

Methodology (briefly)

The methodology adopted combines theoretical research into cardiovascular disease and immersive technologies, with agile development of the application. It comprises the following stages:

· Documentary analysis and collection of pedagogical needs;

· Design of models and 3D modelling of anatomical elements;

· Integration into a virtual reality engine (Unity);

· Programming of interactions and clinical scenarios;

· Testing and adjustments

Structure of the document

This thesis is structured around three main chapters.

The first chapter lays the theoretical foundations for our study. It presents the medical context of coronary artery disease and the issues involved in training cardiology students to manage it. It also provides a critical analysis of existing solutions, highlighting their advantages and limitations.

The second chapter is devoted to the design of the system developed. It describes the technical choices made and uses UML modeling to illustrate the main interactions through use case and sequence diagrams. The use of tools such as Unity and Blender is also justified, in view of the project's educational and immersive objectives.

Finally, the third chapter outlines the results obtained from implementing the system, while highlighting the difficulties encountered. It concludes with an outlook on possible improvements and future developments for the project.

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Chapter1

State of Art

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