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Old 05-24-2013
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Heart Left Atrium and Left Ventricle Pressures

During which phase are pressures in left atrium and left ventricle most equal?
a. ventricular filling phase
b. ISO volumetric contraction phase
c. systolic ejection phase
d. ISO volumetric relaxation phase
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Old 05-24-2013
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A--ventricular filling phase ?
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Old 05-24-2013
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This is between the time when mitral valve opens and when it closes. So my answer is
Ventricular filling phase.
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this q is from FA Q&A. answer given is b , isovolumetric contraction
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Are you sure it is the exact phrase that is in the original question ??

if you phrase the question to this .....During which phase the pressure in ventricles and atria get equal .... then i guess B is correct ....

otherwise remain most equal ....would tell us to point the phase where the ventricle's and atrial pressure remain close to each other at most of the time
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I rechecked question. it says most equal.. isovolumetric contraction phase doesn't make sense to me even and I agree with ur explanation
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Old 05-24-2013
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Quote:
Originally Posted by saleem khawaja View Post
this q is from FA Q&A. answer given is b , isovolumetric contraction
Really? From the PV curse left atrial and lv pressure coincide at the point when mitral valve opens and closes which correspond to ventricular filling. Well will check it up! Pls question number what?
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Quote:
Originally Posted by npktun View Post
Are you sure it is the exact phrase that is in the original question ??

if you phrase the question to this .....During which phase the pressure in ventricles and atria get equal .... then i guess B is correct ....

otherwise remain most equal ....would tell us to point the phase where the ventricle's and atrial pressure remain close to each other at most of the time
Is there really difference between get equal and most equal? I don't think so. Both phrases are talking about when the two pressures are equal the important thing is the word EQUAL.
Don't u think so?
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Old 05-28-2013
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Quote:
Originally Posted by nsesereso View Post
Is there really difference between get equal and most equal? I don't think so. Both phrases are talking about when the two pressures are equal the important thing is the word EQUAL.
Don't u think so?
get equal means ....the first instance the both pressures get equal .... but if you use most equal...according to me ... most equal means close to and that would suggest that the pressure doesn't get equal so we should point the time when both pressures remain equal most of the time ....

what do you think ??
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Old 05-28-2013
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Pressures are most equal during ventricular filling. I checked and found this picture.
Attached Thumbnails
Left Atrium and Left Ventricle Pressures-capture.jpg  
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Old 05-28-2013
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Quote:
Originally Posted by npktun View Post
get equal means ....the first instance the both pressures get equal .... but if you use most equal...according to me ... most equal means close to and that would suggest that the pressure doesn't get equal so we should point the time when both pressures remain equal most of the time ....

what do you think ??
Ok I get u!
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Quote:
Originally Posted by mutant View Post
Pressures are most equal during ventricular filling. I checked and found this picture.
Yeah according to it ... it should be ventricular filling .... but in ventricular filling the pressure remains nearly equal .... not exactly ... but these pressure do get equal during initial phase of
  1. isovolumetric contraction
  2. rapid ventricular filling
so the phrasing of the question i think needs to be changed ... at first get equal or remain most equal
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Old 07-01-2013
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Correct Answer

I came across the same question in USMLE Rx.

Correct answer is A. Ventricular filling phase

Isovolumetric contration (wrong answer) begins when mitral valve shuts close. The only point where MV can close is when the pressure in ventricle exceeds the atrial pressure. So ventricular pressure is greater during entire phase of isovolumetric contraction.
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