A new model of ventricular plication: a suturing technique to decrease left ventricular dimensions, improve...

Area of Science:

• Cardiovascular Surgery
• Experimental Cardiology
• Surgical Innovation

Background:

• The Batista procedure, a cardio-reduction technique, improves ventricular function in dilated cardiomyopathy.
• Myocardial infarct scars contribute to adverse ventricular remodeling and dysfunction.
• Current surgical approaches may involve tissue resection, necessitating alternative methods.

Purpose of the Study:

• To evaluate a novel suturing technique for cardio-reduction of myocardial infarct scars in a rat model.
• To assess the efficacy of this non-resection approach in improving ventricular function post-myocardial infarction.

Main Methods:

• Myocardial infarction was induced in rats via left coronary artery occlusion.
• A pursestring suture was applied to the border zones of the infarcted area and tightened in the treatment group.
• Echocardiography was used to measure left ventricular dimensions and fractional shortening before and after the procedure.

Main Results:

• The suturing technique acutely decreased left ventricular end-diastolic and end-systolic lengths, significantly increasing fractional shortening.
• Control rats exhibited progressive left ventricular enlargement and decreased fractional shortening over 6 weeks.
• Treated rats maintained significantly smaller ventricular diameters and improved fractional shortening compared to controls at 6 weeks.

Conclusions:

• Non-resection cardio-reduction using a pursestring suture effectively reduces ventricular dimensions after myocardial infarction.
• This technique acutely improves and sustains improved ventricular function in a rat model of post-infarction remodeling.
• The findings suggest a promising alternative to resection-based cardio-reduction techniques.