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Related Concept Videos

Mitral Stenosis III: Medical Management01:26

Mitral Stenosis III: Medical Management

215
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...
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Mitral Regurgitation III: Medical Management01:25

Mitral Regurgitation III: Medical Management

242
Mitral regurgitation (MR) is characterized by retrograde blood circulation from the left ventricle into the left atrium due to inadequate mitral valve closure. The severity of the condition, symptoms, and underlying cause determine treatment strategies.Monitoring and Pharmacological TreatmentPatients with mild to moderate MR typically do not need immediate intervention but regular monitoring to assess progression and guide treatment. Patients with mild MR should have an echocardiogram every 3-5...
242
Mitral Regurgitation I: Introduction01:20

Mitral Regurgitation I: Introduction

358
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...
358
Mitral Stenosis I: Introduction01:22

Mitral Stenosis I: Introduction

370
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...
370
Mitral Valve Prolapse II: Assessment and Management01:22

Mitral Valve Prolapse II: Assessment and Management

362
IntroductionA range of clinical features characterizes Mitral Valve Prolapse (MVP), but it is important to note that many individuals with MVP are asymptomatic and may remain so throughout their lives. For those who do exhibit symptoms, the following are the key clinical features:Palpitations: This is a common symptom where individuals feel an irregular or rapid heartbeat. Palpitations in MVP are often due to arrhythmias such as premature ventricular contractions or supraventricular...
362
Mitral Stenosis II: Clinical features and Diagnostic Tests01:23

Mitral Stenosis II: Clinical features and Diagnostic Tests

186
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...
186

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Fully Endoscopic Mitral Valve Repair with Percutaneous Cannulation of Groin Vessels
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Novel Trigone-Based Sizing Method for Mitral Ring Annuloplasty.

Hiroshi Okamoto1, Yasuyuki Fujimoto1, Chikao Teramoto1

  • 1Department of Cardiovascular Surgery, Yokkaichi Municipal Hospital, Yokkaichi, Japan.

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A novel trigone-based sizing method for mitral annuloplasty effectively controlled mitral regurgitation (MR) without causing complications like systolic anterior motion. This technique offers a promising approach for MR treatment.

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Area of Science:

  • Cardiovascular Surgery
  • Cardiac Surgery
  • Medical Devices

Background:

  • Mitral regurgitation (MR) is a common cardiac condition requiring surgical intervention.
  • Current sizing methods for mitral annuloplasty may not consistently prevent adverse outcomes.
  • A novel trigone-based sizing approach was developed to address these limitations.

Purpose of the Study:

  • To introduce and evaluate a novel trigone-based sizing method for mitral annuloplasty.
  • To assess the efficacy of this method in controlling MR and preventing complications.
  • To analyze the impact of the sizing method on patient outcomes, including MR recurrence and transmitral pressure gradient.

Main Methods:

  • A cohort of 436 patients with degenerative, nonischemic functional, or ischemic MR underwent mitral valvuloplasty using an incomplete ring and the novel trigone-based sizing method.
  • Intertrigonal distance and annular diameters were measured pre- and post-repair.
  • Predicted diameters were calculated using body surface area and intertrigonal distance, and their ratios to observed diameters were analyzed for correlation with MR recurrence, transmitral pressure gradient, and systolic anterior motion.

Main Results:

  • Initial repair success rate was 99% (433/436 patients).
  • Long-term freedom from grade 2 or higher recurrent MR was achieved in a high percentage of patients across all MR types (e.g., 86% at 10 years in degenerative MR).
  • A higher observed/body surface area predicted diameter ratio correlated with a lower transmitral pressure gradient, while a ratio <0.9 was not associated with less MR recurrence but was linked to systolic anterior motion in degenerative MR.

Conclusions:

  • The trigone-based sizing method provides satisfactory control of mitral regurgitation.
  • This novel technique successfully avoids adverse events such as functional mitral stenosis and systolic anterior motion.
  • The study demonstrates the clinical utility of the trigone-based sizing method in mitral annuloplasty.