Related Experiment Video
Updated: Jun 25, 2026

Echocardiographic Evaluation of Atrial Communications before Transcatheter Closure
Published on: February 8, 2022
Inferior type sinus venosus atrial septal defect: MR findings
Alberto Hidalgo1, Mai-Lan Ho, Sanjeev Bhalla
1Mallinckrodt Institute of Radiology, Washington University School of Medicine, Saint Louis, MO, USA. alhidalgop@yahoo.es
Abstract:
Atrial septal defects can occur at various levels of the interatrial septum. Sinus venosus atrial septal defect (SVASD) results from abnormal resorption of the embryologic sinus venosus, and may be of the superior or inferior type. In this paper, we describe a 46-year-old man with inferior-type SVASD who presented with arrhythmias and dyspnea. Cardiac magnetic resonance and cardiac catheterization were useful in evaluating the anatomic/functional characteristics of inferior-type SVASD and distinguishing it from unroofed coronary sinus.
Related Concept Videos
Mitral Stenosis II: Clinical features and Diagnostic Tests
Overview of Systemic Veins
The coronary sinus, the heart's principal vein, resides in the coronary sulcus on the heart's posterior aspect. This broad venous channel receives nearly all venous blood from the myocardium, the heart muscle. It is fed by three primary veins: the great cardiac vein, the middle...
Mitral Regurgitation II: Clinical Features and Diagnostic Tests
Cardiovascular System Abnormal Findings II: Auscultation
Abnormal Heart Sounds
Gallops:
Aortic Regurgitation II: Clinical Features and Diagnostic Tests
Imaging Studies for Cardiovascular System II:Types of Echocardiography
Types of Echocardiography
Transthoracic Echocardiography (TTE)
TTE is the most common type of echocardiogram which involves placing a transducer on the patient's chest, emitting sound waves to create heart images. TTE is invaluable for evaluating the heart's size, structure, and motion, making it particularly useful for diagnosing...

