Related Experiment Video
Updated: May 7, 2026
12:12
Echocardiographic Approaches and Protocols for Comprehensive Phenotypic Characterization of Valvular Heart Disease in Mice
Published on: February 14, 2017
15.9K
Mitral Isthmus anatomy: Detailed examination and classification proposal
Buse Naz Çandır Gürses1, Kader Yılar2, Çağla Ergin3
1Department of Anatomy, Faculty of Medicine, Istanbul Yeni Yuzyil University, Istanbul, Turkey.
Summary
The mitral isthmus (MI) anatomy varies significantly, with common vessels like the great cardiac vein (GCV) and left circumflex artery (LCx) found in diverse patterns. Understanding these vascular variations is crucial before cardiac ablation procedures.
Area of Science:
- Cardiovascular Anatomy
- Electrophysiology
- Cardiac Surgery
Background:
- The mitral isthmus (MI) is a critical area for cardiac ablation procedures.
- Variations in the anatomical structures within the MI can impact ablation success and safety.
Purpose of the Study:
- To investigate the anatomical features of the mitral isthmus (MI) line.
- To identify and map the vessels located within the MI and their precise localization.
Main Methods:
- Measurement of MI length and left atrial wall thickness in 65 autopsied hearts.
- Recording the distances of vessels (Great Cardiac Vein - GCV, Left Circumflex Artery - LCx, Vein of Marshall - VOM) to anatomical landmarks like the mitral annulus (MA) and left inferior pulmonary vein (LIPV).
Main Results:
- The mean MI length was 49.6 mm and left atrial wall thickness was 3.9 mm.
- GCV was present in 100% of cases, LCx in 60%, and VOM in 63.1%.
- Four types of vascular patterns were identified, with Type-4 (GCV, LCx, VOM) being the most common (41.5%). LCx relative position to GCV also showed significant variation.
Conclusions:
- The anatomical structure of the mitral isthmus is highly variable and not standardized.
- Awareness of these vascular patterns is essential for interventional electrophysiologists to optimize safety and efficacy during ablation procedures.
Related Concept Videos
01:27Mitral Valve Prolapse I: Introduction
1.1K
IntroductionThe mitral valve, one of the heart's four valves, regulates blood flow. These valves have flaps that open and close to direct blood properly through the heart and body. During each heartbeat, the flaps open for blood to pass through and seal shut to prevent backflow. Specifically, the mitral valve opens to allow blood flow from the heart's upper left chamber to the lower left chamber. It then closes securely as the lower left chamber contracts to pump blood to the body, preventing...
1.1K
01:20Mitral Regurgitation I: Introduction
1.3K
Mitral regurgitation is characterized by the backward circulation of blood from the left ventricle to the left atrium during systole, a phase of the cardiac cycle when the heart contracts and pumps blood out of the chambers. This abnormal flow occurs primarily due to the dysfunction of the mitral valve or its supporting structures, which include the mitral leaflets, chordae tendineae, annulus, and papillary muscles.Etiology and Mechanisms:Primary Mitral Regurgitation: This type arises from...
1.3K
01:23Mitral Regurgitation II: Clinical Features and Diagnostic Tests
947
Mitral regurgitation (MR) is a valvular heart disorder in which the mitral valve fails to close tightly, allowing blood to leak backward into the heart. Understanding the clinical manifestations, assessment, diagnostic findings, and medical management of MR is crucial to effectively managing affected patients.Clinical Manifestations of Mitral RegurgitationMitral regurgitation can be acute or chronic, each presenting differently and requiring different approaches:1. Acute Mitral...
947
01:22Mitral Stenosis I: Introduction
1.8K
Mitral Valve Stenosis (MVS) is a heart condition where the mitral valve narrows, impeding blood circulation from the left atrium to the left ventricle. The etiology and pathophysiology of this condition are multifaceted, leading to a cascade of cardiovascular complications.Causes of Mitral Valve StenosisRheumatic Heart Disease: It is the main cause of mitral valve stenosis, particularly in developing nations. This condition arises from rheumatic fever, an inflammatory illness resulting from...
1.8K
01:23Mitral Stenosis II: Clinical features and Diagnostic Tests
564
Mitral stenosis is a heart condition in which the mitral valve, which allows blood to flow from the left atrium to the left ventricle, becomes narrowed or stenotic. This narrowing hinders blood flow and leads to clinical symptoms requiring specific medical evaluations and management strategies. The following overview outlines the clinical symptoms, assessments, diagnostic findings, prevention methods, and treatments for mitral stenosis.Clinical ManifestationsDyspnea (shortness of breath): This...
564
01:26Mitral Stenosis III: Medical Management
538
Mitral stenosis, a condition marked by the narrowing of the mitral valve, necessitates an integrated approach for effective management. This approach includes preventative measures, medical therapy, and surgical interventions to reduce symptoms and prevent complications.PreventionPrevention of mitral stenosis primarily focuses on reducing the incidence of bacterial infections, particularly streptococcal infections, which can lead to rheumatic fever and subsequent valvular damage. Timely...
538