| 1
.
| Fragment of aorta at point of attachment of ligamentum arteriosum |
| 2
.
| Left pulmonary artery |
| 3
.
| Left auricle |
| 4
.
| Left pulmonary veins (superior vein partially hidden) |
| 5
.
| Left oblique atrial vein |
| 6
.
| Ventricular branches of circumflex branch of left coronary artery |
| 7
.
| Great cardiac vein |
| 8
.
| Coronary sinus (covered by thin layer of muscle continuous with atrial myocardium) |
| 9
.
| Left ventricle |
| 10
.
| Right pulmonary artery |
| 11
.
| Pericardial reflection at margin of oblique sinus |
| 12
.
| Left atrium |
| 13
.
| Right pulmonary veins |
| 14
.
| Atrial branch of left coronary artery |
| 15
.
| Right atrium |
| 16
.
| Inferior vena cava |
| 17
.
| Right coronary artery (in coronary sulcus) |
| 18
.
| Margin of dissected. area |
| 19
.
| Right ventricle |
| 20
.
| Middle cardiac vein (in posterior interventricular sulcus) |
| 21
.
| Posterior interventricular branch of right coronary artery |
