Minimally Invasive Electro-Septal Myectomy (MESM)

Names readers may encounter

• Chinese professional reporting pairs 微创室间隔电切术 with MESM.[6]
• In the MESM literature, minimally invasive septal myectomy uses sternum-sparing right infra-axillary access rather than a catheter-only route.[2]
• Transaortic septal myectomy via right infra-axillary incision is the title terminology of the 148-patient cohort.[2]
• The MESM programme describes the operation as a modified transaortic Morrow procedure.[1]
• 微创Morrow术 appears as Chinese shorthand on a public physician profile.[7]
• Classical septal myectomy removes thickened septal muscle during open-heart surgery to relieve obstruction.[8]
• Alcohol septal ablation is a catheter-based septal-reduction procedure rather than MESM.[5]

Procedure explanation

Candidacy boundaries

The 100-patient MESM cohort enrolled people with symptomatic hypertrophic obstructive cardiomyopathy that remained refractory to medical therapy.[3]

The AHA and ACC guideline says septal-reduction therapy must be performed at experienced hypertrophic-cardiomyopathy centres.[4]

The guideline says septal-reduction therapy should not be performed in asymptomatic patients with normal exercise capacity.[9]

Five-option comparison

Evidence and overlap

The reported enrolment windows do not overlap, so the two cohorts are independent by patient dates but not independent external confirmation.[10]

Shared authors: Shuwei Wang, Zhiqiang Dong, Zhifang Liu, Erlei Han, Changhao Wu, Chentao Luo, Weikang Chen, Fuyang Mei, Xiaofeng Lu, Meijuan Yan, Zhenzhen Wang, Bing Zhou and Yong Cui.

Material risks

Randomised comparisons of MESM against sternotomy myectomy have not been performed.[1]

Recovery and follow-up

Alternatives and postponement

The guideline places beta-blockers first and lists myosin inhibitors, disopyramide, or septal-reduction therapy when symptoms persist after medication trials.[4]

The guideline recommends surgical myectomy when associated cardiac disease also requires surgery and allows alcohol septal ablation when surgery is contraindicated.[4]

Alcohol septal ablation uses ethanol to make the targeted septal cells die and the thickened tissue shrink.[5]

Hypertrophic cardiomyopathy can worsen over time and may lead to atrial fibrillation, stroke, heart failure, or sudden cardiac arrest.[5]

Clinic dossier

Bounded team

Yong Cui, MD, PhD

PubMed affiliates Yong Cui with the Heart Center and Department of Cardiovascular Surgery at Zhejiang Provincial People’s Hospital in Hangzhou.[3]

A professional training report states that Yong Cui demonstrated MESM during live surgical teaching.[11]

The MESM programme names Yong Cui as its cardiac surgeon and technique creator.[1]

PERSONALLY_OPERATING D3 Access UNVERIFIED

Zhenzhen Wang, MD

The MESM programme names Wang Zhenzhen in echocardiography and diagnosis.[1]

CENTRE_PARTICIPATION D1

Meijuan Yan, MD

The MESM programme names Yan Meijuan in anaesthesia and ultra-fast-track care.[1]

CENTRE_PARTICIPATION D1

Records and questions

• Bring the complete echocardiography files, not only a written summary.
• Add cardiac CT or MRI when available.
• List current and previously tried medicines.
• Ask which anatomy drives the obstruction.
• Request the named operator and accountable perioperative team.
• Ask for centre-specific contemporary outcomes.
• Agree who owns routine follow-up, urgent complications and records transfer.

FAQ by procedure name

Sources

1. MESM programme, technique, team and referral requirements
2. JTCVS Techniques cohort
3. PubMed MESM cohort record
4. ACC HCM guideline key points
5. American Heart Association HCM overview
6. Chinese MESM terminology report
7. Chinese physician profile
8. Cleveland Clinic septal myectomy overview
9. AHA/ACC guideline slide deck
10. Publisher cohort page and limitations
11. Professional training report
12. Public portrait source