A man 27 years old, who was a drug abuse addict, was stabbed -on the street during an arguement with a man part of a group- with a self-made weapon consisted of a wooden bar, 1.5 mtrs long which was supported, at one end with a pointed knife and the other end with a sharp hammer edge. The homicide was arrested and the weapon found at his house.
The autopsy demonstrate an incise wound in the right side of the thorax which penetrated the right lung and the right heart ventricle. The pericardiac sac shows a haematoma, at tension, and at the aortic wall a dissecting haematoma. We received the heart with the dissection made following the haemodinamic outflow with exposition and opening of the aortic valve. Macroscopically, the heart -260 g - showed a stab wound in the anterior wall of the right ventricle, near the atrioventricular groove, which penetrated into the aorta where could be seen an entrance wound, and an exit wound located at the posterior wall of the aorta ( see. fig.2); it measured 1 cm long and orientated parallel to the aortic cusps of the aortic valve which penetrated through the aortic wall (trans-aortic stab wound); the exit wound in the posterior side of the aortic wall was plugged with the dissecting haematome.
Foto 4.-Stab aortic wound. Note the anterior face of the exit wound in the posterior aortic wall. The exit wound is plugged due to the dissecting haematome.(asterisc).