Double-chambered left ventricle as a novel cause of aneurysm formation at the apex of accessory chamber

• Published in: Radiology case reports Vol. 19; no. 10; pp. 4478 - 4481
• Main Authors: Suzuki, Michiko, Orii, Makoto, Sasaki, Ryo, Chiba, Takuya, Sugawara, Tsuyoshi, Uchimura, Yohei, Morino, Yoshihiro, Yoshioka, Kunihiro
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier Inc 01.10.2024; Elsevier
• Subjects: Apex aneurysm; Cardiac magnetic resonance; Case Report; Double-chambered left ventricle; ECG-gated 4-dimensional CT; Hypertrophic cardiomyopathy; Mid-ventricular obstruction; Hypertrophic cardiomyopathy; Mid-ventricular obstruction; ECG-gated 4-dimensional CT; Apex aneurysm; Cardiac magnetic resonance; Double-chambered left ventricle
• ISSN: 1930-0433; 1930-0433
• DOI: 10.1016/j.radcr.2024.07.033

This case report shows unique aneurysm at the left ventricular apex associated with a double-chambered left ventricle (DCLV) in asymptomatic 69-year-old female. The aneurysm was located at the apex of an accessory chamber, which was formed by hypertrophied muscle band and the interventricular septum, along with a pronounced jet flow directed towards the apex aneurysm. These finding suggests that the obstruction at the base of the accessory chamber caused a pressure overload at the apex, ultimately leading to the development of the aneurysm. To best of our knowledge, this is the first case to prove the underlying cause of aneurysm formation in DCLV.