A radiofrequency modified maze and valve procedure through a port-access approach.

The heart surgery forum · 2003 · Benefit · Low evidence

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BenefitLow evidencePaper 3746

Study snapshot

PublicationThe heart surgery forum · 2003

Study typeother

Reported directionBenefit

Evidence ratingLow

Abstract

BACKGROUND: The aim of the study was to assess the feasibility and effectiveness of the irrigated radiofrequency modified maze procedure through a port-access approach during mitral valve surgery. METHODS: Forty-three patients with atrial fibrillation (AF) and mitral valve disease underwent a combined procedure through a port-access approach. The indication was a history of continuous AF for more than 6 months in patients eligible for minimally invasive mitral valve surgery. RESULTS: The incidence of early mortality was 1 patient (2.3%), and that of freedom from AF was 100% at the end of the operation (70% of patients with normal sinus rhythm, 30% with a pacemaker). One patient (2.3%) required permanent pacemaker implantation after surgery. One patient (2.3%) required reoperation for bleeding. There were no reoperations for failed valve repairs. The incidences of freedom from AF were 87% and 92% at 6 and 12 months, respectively. At 12 months, functional capacity had improved significantly (P < .05). There were no procedure-related complications. No thromboembolic events were detected during follow-up. CONCLUSION: The port-access approach provided a good access for both valve surgery and the radiofrequency maze procedure. The combination of direct and videoscopic vision allowed an adequate view and led to a safe and efficient combined procedure. Short- and intermediate-term follow-up results were favorable.

Machine Enhanced Logic

AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typeother

Effect directionbenefit

PopulationPatients with atrial fibrillation and mitral valve disease undergoing minimally invasive mitral valve surgery

Sample size43

ExposureNot supplied

Evidence strengthLowConfidence: 74% · Peer reviewed: yes

Main findings

In 43 patients, early mortality was 2.3%. Freedom from AF was reported as 100% at the end of the operation and 87% and 92% at 6 and 12 months, respectively; functional capacity improved significantly at 12 months (P<.05). One patient required permanent pacemaker implantation and one required reoperation for bleeding; no procedure-related complications or thromboembolic events were detected during follow-up.

Outcomes measured

Feasibility of port-access approach for irrigated radiofrequency modified maze during mitral valve surgery
Early mortality
Freedom from atrial fibrillation (end of operation; 6 and 12 months)
Need for permanent pacemaker implantation
Reoperation for bleeding
Reoperation for failed valve repair
Functional capacity at 12 months
Procedure-related complications
Thromboembolic events during follow-up

Limitations

No control/comparator group described in the abstract
Follow-up limited to short/intermediate term (reported to 12 months)
Frequency/dose parameters of radiofrequency energy not reported in the abstract

View raw extracted JSON

{
  "study_type": "other",
  "exposure": {
    "band": null,
    "source": "medical radiofrequency ablation (surgical maze procedure)",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": "Patients with atrial fibrillation and mitral valve disease undergoing minimally invasive mitral valve surgery",
  "sample_size": 43,
  "outcomes": [
    "Feasibility of port-access approach for irrigated radiofrequency modified maze during mitral valve surgery",
    "Early mortality",
    "Freedom from atrial fibrillation (end of operation; 6 and 12 months)",
    "Need for permanent pacemaker implantation",
    "Reoperation for bleeding",
    "Reoperation for failed valve repair",
    "Functional capacity at 12 months",
    "Procedure-related complications",
    "Thromboembolic events during follow-up"
  ],
  "main_findings": "In 43 patients, early mortality was 2.3%. Freedom from AF was reported as 100% at the end of the operation and 87% and 92% at 6 and 12 months, respectively; functional capacity improved significantly at 12 months (P<.05). One patient required permanent pacemaker implantation and one required reoperation for bleeding; no procedure-related complications or thromboembolic events were detected during follow-up.",
  "effect_direction": "benefit",
  "limitations": [
    "No control/comparator group described in the abstract",
    "Follow-up limited to short/intermediate term (reported to 12 months)",
    "Frequency/dose parameters of radiofrequency energy not reported in the abstract"
  ],
  "evidence_strength": "low",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "radiofrequency",
    "modified maze procedure",
    "port-access",
    "minimally invasive",
    "mitral valve surgery",
    "atrial fibrillation",
    "pacemaker",
    "follow-up"
  ],
  "suggested_hubs": []
}

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AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: Not supplied
PubMed: 14721796

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