A 35 year old woman suffers chest trauma. She has reported being unconscious and a large decrease in blood pressure. There is a tear in the pulmonary vein at the point where the vein enters the heart. In which space does hemorrhage occur? Epicardium and parietal pericardium Myocardium and parietal pleura ???HELP Myocardium and Epicardium Parietal pericardium and fibrous pericardium
Question
A 35 year old woman suffers chest trauma. She has reported being unconscious and a large decrease in blood pressure. There is a tear in the pulmonary vein at the point where the vein enters the heart. In which space does hemorrhage occur? Epicardium and parietal pericardium Myocardium and parietal pleura ???HELP Myocardium and Epicardium Parietal pericardium and fibrous pericardium
Solution
The correct answer is "Epicardium and parietal pericardium".
Here's why:
The heart is surrounded by a double-layered sac called the pericardium. The inner layer, which is in direct contact with the heart, is the epicardium. The outer layer is the parietal pericardium. Between these two layers is a potential space called the pericardial cavity.
If there is a tear in the pulmonary vein where it enters the heart, the blood would leak into this pericardial cavity. This is because the point where the pulmonary veins enter the heart is covered by the epicardium, and the blood would therefore flow into the space between the epicardium and the parietal pericardium.
This can lead to a condition called cardiac tamponade, where the blood in the pericardial cavity puts pressure on the heart and prevents it from pumping effectively. This would explain the woman's symptoms of unconsciousness and a large decrease in blood pressure.
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