N5_B1_Q9

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N5_B1_Q9

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ddold
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05/11/08 - 06:19 PM

9. A 60-year-old woman is brought to the emergency department by her husband because of chest pain that began 3 hours ago. She is dyspneic and diaphoretic, and she appears anxious. Her pulse is 110/min and regular, respirations are 35/min, and blood pressure is 190/110 mm Hg. An ECG shows an acute myocardial infarction. Which of the following is the most likely cause of this patient's pain?
A Abnormalities of ion transport in myocytes
B Accumulation of metabolic products in heart tissue
C Increased diastolic pressure
D Increased parasympathetic stimulation
E Increased sympathetic stimulation
F Increased systolic pressure

ieltsforall
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05/11/08 - 06:41 PM

b

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maoudoody
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05/11/08 - 08:01 PM

ddold
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05/11/08 - 08:05 PM

thank you!

match2010
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05/11/08 - 08:32 PM

plz can u explain this one ! shaking head

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maoudoody
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05/11/08 - 08:45 PM

well heart muscle intrinsicly autoregulates its circulation

when the blood flow decreases heart produces metabolic products the most famous of them is adenosine which dilates the smooth muscles and at the same time stimulate the afferent sypathetic nerve---- thoracic ganglion----- dorsal horn of spinal cord----- thalamus

Tiff
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05/12/08 - 10:57 AM

B - due to the necrotic myocardium

kabootra
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05/12/08 - 05:04 PM

hey , can anyonerelate this question to the activation of J- receptors as told by Dr. Goljan----
he emphasised highly on those J-receptors as the cause of pain in MI.....i mean then the ans. might change--- nod

Tiff
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05/12/08 - 06:58 PM

kabootra wrote:
hey , can anyonerelate this question to the activation of J- receptors as told by Dr. Goljan----
he emphasised highly on those J-receptors as the cause of pain in MI.....i mean then the ans. might change--- nod

no. what is the relationship? Very curious to know. if you remember please let us know.

kabootra
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05/13/08 - 07:38 PM

#10

@Tiff

well, i can recall that due to CHF, there is inc. hydrostatic pressure in the pulmonary arterioles.
the transudate oozes out of the vessel and it stimulates the J-receptors--they activate teh pain pathway---i dnt have a clear concept but all written is what emphasised by Dr. Gljan 00 i hope i dint mis-interpret him!-----

Tiff
Forum Guru

Topics: 54
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05/13/08 - 08:56 PM

#11

Thanks - I'll be sure to keep a look out on that topic. Sounds like a good test question.

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