1. Use of untreated pericardial patches for atrial septal defect closure
Lalit Kapoor, Shantanu Pande, Partho Protim Roy 
The Annals of Thoracic Surgery 
Volume 70, Issue 2, Pages (August 2000)
DOI: /S (00)

2. Fig 1
The tongue of pericardium is being sutured to the inferior and right margins of the atrial septal defect.
The Annals of Thoracic Surgery  , DOI: ( /S (00) )

3. Fig 2
Once half the circumference is completed, the “tongue” of pericardium is cut to an appropriate size.
The Annals of Thoracic Surgery  , DOI: ( /S (00) )

4. Fig 3
The suturing of the patch to the margins of the defect is completed.
The Annals of Thoracic Surgery  , DOI: ( /S (00) )