Related Experiment Videos
[Infarction exclusion technique for postinfarction ventricular septal defect]
G Yaginuma1, M Ottomo, Y Okada
1Department of Cardiovascular Surgery, Yamagata Prefectural Central Hospital, Japan.
Insights
A novel surgical technique for post-infarction ventricular septal defects involves excluding the infarcted area. A modified conic patch successfully eliminated residual shunts in subsequent cases, improving outcomes.
Area of Science:
- Cardiovascular Surgery
- Cardiac Surgery Techniques
- Ventricular Septal Defect Repair
Context:
- Post-infarction ventricular septal defect (VSD) presents a significant surgical challenge.
- High left ventricular pressure can compromise standard VSD repair methods.
- Patients often present with cardiogenic shock, necessitating urgent intervention.
Purpose:
- To describe a new surgical technique for repairing post-infarction VSD.
- To evaluate the efficacy of an infarction exclusion technique using a novel patch design.
- To assess the impact on left ventricular function and residual shunting.
Summary:
- A technique was developed to suture a patch to healthy endocardium, excluding the infarcted area from high left ventricular pressure.
- Initial cases used a 2D plane patch, resulting in a residual shunt in one patient.
- A modified circular conic patch, better fitted to the endocardium, eliminated residual shunts in subsequent patients.
- All three patients survived urgent surgery, with two also undergoing coronary artery bypass grafting (CABG).
Impact:
- The modified conic patch technique shows promise for successful VSD repair while preserving left ventricular function.
- Further refinement of the technique is needed to consistently prevent residual shunts.
- This approach offers a viable option for patients with complex post-infarction VSDs.
Abstract:
A new technique for post-infarction ventricular septal defect is accomplished by suturing a single patch to healthy endocardium excluding the infarcted area from the high left ventricular pressure. We have used this infarction exclusion technique for 3 cases since 1994. Three patients developed cardiogenic shock before operation and were managed initially with an intra-aortic balloon pump. All patients were urgently operated using this technique, at the same time, CABG operation was performed in 2 cases from the finding of preoperative coronary angiography. All of the patients survived. The first patient had a residual shunt (L-R; 30%), which spontaneously resolved in one month after the operation. In this method, a two-dimensional plane patch has to be sutured to healthy endocardium like a three-dimensional dome. Consequently the edge of the patch has wrinkles, which cause a residual shunt easily at the suture line. So from the second case, previously prepared circular conic patch, which had been made from a plane circular patch, was sutured to the left ventricular endocardium. At the suture line, this conic patch was well fitted to the endocardium, and the patients had no residual shunt. Though this method has the advantage to retain left ventricular function and volume, the technique must be improved to prevent residual shunt after operation.