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Re: heart size
Posted By Bob on November 25, 1998 at 00:33:00:

In Reply to: Re: heart size posted by CCF CARDIO MD - CRC on November 24, 1998 at 14:19:18:

                                                          Hi,                                                                                                                In archives of the forum  I found three different normal  values for left atrium and left ventricle.               left atrium                                3.0-4-0cm     left ventricle end diastolic diameter      4.5-5.6cm     left ventricle end systolic diameter       3.0-4.0cm                                                               left atrium                                3.0-4.0cm     left ventricle id(dia)                     3.5-4.5cm     left ventricle id(sys)                     2.5-3.5cm                                                               left atrium                                3.0-4.0cm     left ventricle                             4.0-5.0cm     left ventricle                             3.0-4.0cm                                                               What are normal values of left atrium and left ventricle for a  (a) sedentary man, (b) a man who exercises a lot and (c) athletic man? What is the difference between left ventricle end diastolic and systolic with left ventricle iddia+idsys. Is left atrium normal value same as left ventricle idsys? In archive I found out that normal ejection fraction is >55 but does not say  up to what number. What is normal ejection fraction range? Is it better if it is on low, average or high side of normal? Thank you for your time. Bob
Dear Bob,
Thank you for your question.  You have been paying attention.   Part of the problem is that an echocardiogram is a 2D image of a 3D object.  The measurement will change depending on when in the cardiac cycle you measure (end contraction - systole, or end relaxation - diastole).  Also normal heart size will vary with the size of the individual.  I won't confuse the issue by giving more size measurements but all of the ones you quote are in the "ballpark".
Normal ejection fraction ranges from 50 to 75%.  Any value in this range is OK.
I hope you find this information useful.  Information provided in the heart forum is for general purposes only.  Only your physician can provide specific diagnoses and therapies.  Please feel free to write back with additional questions.
If you would like to make an appointment at the Cleveland Clinic Heart Center, please call 1-800-CCF-CARE or inquire online by using the Heart Center website at www.ccf.org/heartcenter.  The Heart Center website contains a directory of the cardiology staff that can be used to select the physician best suited to address your cardiac problem.

I did not understand what you meant by "The measurement will change depending on when in cardiac cycle you measure it"Will there be any significant change if I repeat echo measurement of left atrium and left ventricle(diastolic), two months after the first one? If I  decrease exercise intensity and duration for two months, will that have any effect on heart dimensions? Does left ventricle end diastolic diameter mean same as left ventricle id(dia)?Up to what top normal range number can left ventricle end diastolic diameter and left ventricle id(dia) go in mm? Thank you for your time. Bob

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