Two types of double chambered left ventricle: a case series.

Background: Double chambered left ventricle (DCLV) is a rare anatomical variant of the left ventricular structure characterized by the division of the left ventricle into two distinct chambers due to abnormal muscle bundles or septa. This anomaly typically results in primary and secondary chambers within the left ventricle. Due to the lack of conspicuous clinical symptoms, DCLV is often overlooked. Case summary: The first patient was a 69-year-old male experiencing intermittent chest tightness for several weeks. Transthoracic echocardiography indicated the presence of Type A DCLV, which was subsequently confirmed by 3D echocardiography and cardiac magnetic resonance imaging. An additional case is also worthy of note, during a routine transthoracic echocardiographic examination of a 48-year-old male, we unexpectedly discovered Type B DCLV. His unique cardiac structure was clearly demonstrated through 3D echocardiography. Discussion: Double chambered left ventricle is a rare structural heart malformation often overlooked due to atypical symptoms. This paper presents two cases of DCLV, illustrating two distinct classifications. Comprehensive understanding of the imaging manifestations of DCLV is imperative for accurate clinical diagnosis.