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Quick Scroll Anat - Stab injury to heart 01.19.06 (2 years ago) #1
A patient arrives in the emergency room after having been stabbed.
He has suffered a penetrating wound in the left fourth intercostal
space immediately lateral to the sternal border. Which of the
following thoracic structures is most likely to have been injured?
A. Left atrium
B. Left ventricle
C. Right atrium
D. Right ventricle
E. Upper lobe of the left lung
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Quick Scroll 01.20.06 (2 years ago) #2
right ventricle
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Quick Scroll 01.20.06 (2 years ago) #3
drche wrote:
right ventricle

RIGHT VENTRICLE IS MORE ANTERIOR
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Quick Scroll 01.20.06 (2 years ago) #4
B.Left ventricle (apex beat is in left 5th intercostal space...this is just one space higher)
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Quick Scroll 01.20.06 (2 years ago) #5
This is tricky... The normal anatomical position of heart is so utterly irritating and confusing.

Was just wondering..the intracardiac adrenaline we give...though it has no role in CPCR (now CPR is called as CPCR .. its a ACLS terminology which is Cardio-pulmonary-cerebral-resusc.)...what is its exact location?
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Quick Scroll 01.20.06 (2 years ago) #6
Intracardiac adrenaline injection is given in Lt 2nd intercostal space near sternal border rite?
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Quick Scroll 01.22.06 (2 years ago) #7
The correct answer is D. The right ventricle forms most of the anterior wall of the heart and extends from approximately the right border of the sternum to approximately 2 inches to the left of the sternum at the level of the fourth intercostal space.
The left atrium (choice A) forms the posterior wall of the heart. The only portion of the left atrium seen on the anterior surface of the heart is the left auricular appendage, which is at the level of the second intercostal space on the left.
The left ventricle (choice B) forms most of the left border of the heart and the diaphragmatic surface of the heart. It forms the anterior wall of the heart in a region from approximately 2-3 inches from the left border of the sternum from the third to the fifth intercostal space.
The right atrium (choice C) forms the right border of the heart. Its anterior surface is on the right side of the sternum from approximately the third rib to the sixth rib.
The left lung (choice E) is displaced away from the sternum on the left side by the presence of the heart.
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