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Related Concept Videos

Cardiomyopathy III: Hypertrophic Cardiomyopathy01:29

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Hypertrophic cardiomyopathy, or HCM, is an autosomal dominant genetic disorder characterized by asymmetric left ventricular hypertrophy without ventricular dilation. It is more common in men and is typically diagnosed in young, athletic adults.EtiologyHCM is primarily genetic and is caused by mutations in genes encoding sarcomeric proteins. Researchers have identified over 1400 mutations across at least 11 different genes. Among these, the most frequently occurring mutations are found in the...
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Patients with hypertrophic cardiomyopathy (HCM) and left ventricular outflow tract (LVOT) obstruction who remain symptomatic despite optimal medical therapy may undergo a septal myectomy (Morrow procedure). This procedure involves excising a portion of the hypertrophied septum below the aortic valve using a heart-lung machine to improve blood flow through the LVOT. Effective preoperative and postoperative nursing management ensures successful patient outcomes, minimizes complications, and...
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Managing cardiomyopathy involves addressing underlying or precipitating causes, treating heart failure with medications, and implementing dietary changes and a balanced exercise and rest regimen.Lifestyle ModificationsCardiomyopathy patients should adopt a low-sodium diet to reduce fluid retention and manage heart failure. A personalized exercise and rest plan helps maintain physical fitness without overstraining the heart. Avoiding alcohol and tobacco is essential to prevent further damage to...
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Cardiomyopathy IV: Restrictive Cardiomyopathy01:29

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Restrictive cardiomyopathy (RCM) is a rare heart muscle disease characterized by impaired ventricular filling due to stiffened ventricular walls, leading to significant diastolic dysfunction.EtiologyRestrictive cardiomyopathy can arise from both inherited and acquired diseases, many of which are systemic. It is categorized into four main types: infiltrative, storage, non-infiltrative, and endomyocardial diseases.Infiltrative diseases, such as amyloidosis, lead to RCM by depositing amyloid...
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Minimally Invasive Electro Septal Myectomy for Hypertrophic Obstructive Cardiomyopathy Through a Right Infra-Axillary

Shuwei Wang1, Zhiqiang Dong1, Zhifang Liu1

  • 1Heart Center, Department of Cardiovascular Surgery, Zhejiang Provincial People's Hospital (Affiliated People's Hospital), Hangzhou Medical College, Hangzhou Zhejiang, China.

The Annals of Thoracic Surgery
|October 18, 2025
PubMed
Summary

Minimally invasive electro septal myectomy (MESM) via a right infra-axillary incision is a safe and effective treatment for hypertrophic obstructive cardiomyopathy (HOCM). This approach significantly reduces septal thickness and left ventricular outflow tract gradients with minimal complications.

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Area of Science:

  • Cardiovascular Surgery
  • Minimally Invasive Procedures
  • Cardiomyopathy Research

Background:

  • Hypertrophic obstructive cardiomyopathy (HOCM) presents significant challenges in management.
  • Traditional surgical approaches may involve substantial invasiveness.
  • Evaluating novel minimally invasive techniques is crucial for improving patient outcomes.

Purpose of the Study:

  • To assess the feasibility and short-term outcomes of minimally invasive electro septal myectomy (MESM).
  • To evaluate MESM performed specifically through a right infra-axillary incision for HOCM.
  • To determine the safety and efficacy of this approach in managing HOCM.

Main Methods:

  • A retrospective observational study design.
  • Inclusion of consecutive patients diagnosed with HOCM undergoing MESM.
  • Data collection on procedural details, hemodynamic parameters, and postoperative outcomes.

Main Results:

  • Successful completion of MESM in 100 patients via a right infra-axillary incision without sternotomy conversion.
  • Significant reduction in maximum septal thickness (20.4 mm to 13.2 mm) and LVOT gradient (85.8 mm Hg to 8.4 mm Hg).
  • Elimination of systolic anterior motion, no severe mitral regurgitation, and low complication rates (4.0% pacemaker implantation, no mortality or VSDs).

Conclusions:

  • MESM through a right infra-axillary incision is a feasible and safe surgical option for HOCM.
  • The technique provides significant hemodynamic improvements.
  • This approach offers a minimally invasive alternative with a favorable short-term outcome profile.