Related Experiment Video
Updated: Aug 18, 2026

Creation of Two Saccular Elastase-Digested Aneurysms with Different Hemodynamics in One Rabbit
Published on: April 15, 2021
Large saccular aneurysm in a coronary arterial fistula--a case report
Osamu Kinoshita1, Fumiaki Ogiwara, Takeshi Hanaoka
1The First Department of Internal Medicine, Shinshu University School of Medicine, Matsumoto, Japan. kinos@hsp.md.shinshu-u.ac.jp
Insights
A rare case of a saccular aneurysm in a coronary artery fistula was diagnosed using advanced imaging. This rare condition, if unaddressed, poses a risk of sudden death.
Area of Science:
- Cardiovascular Medicine
- Interventional Cardiology
- Congenital Heart Disease
Background:
- Congenital coronary artery fistulas are relatively common cardiovascular anomalies.
- Saccular aneurysms within these fistulas are exceptionally rare, presenting unique diagnostic and therapeutic challenges.
Observation:
- A large saccular aneurysm was identified within a coronary artery fistula.
- The fistula originated from the left anterior descending coronary artery and drained into the pulmonary artery main trunk.
Findings:
- Diagnosis was confirmed using high-resolution 3-dimensional computed tomography and coronary arteriography.
- The saccular aneurysm represents a critical, rare complication of a coronary artery fistula.
Implications:
- Rupture of the saccular aneurysm can lead to sudden, fatal outcomes.
- Prompt surgical intervention is crucial for managing this rare and dangerous condition.
- This case highlights the importance of advanced imaging in diagnosing rare cardiovascular malformations.
Abstract:
The authors present a case of a large saccular aneurysm in a coronary artery fistula originating from the proximal left anterior descending coronary artery, draining into the main trunk of the pulmonary artery. The diagnosis was made by 3-dimensional computed tomography and coronary arteriography. Congenital coronary artery fistula is not uncommon. With a saccular aneurysm, however, it is very rare. A ruptured aneurysm will induce sudden death if surgical repair is not done.
Related Concept Videos
Aneurysm I: Introduction
Aneurysm III: Interprofessional Care
Aneurysm II: Clinical Manifestations and Diagnostic Studies
Coronary Circulation
Coronary circulation begins at the base of the aorta, where two main arteries arise—the left and right coronary arteries. These arteries encircle the heart in the coronary sulcus and supply the...
