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Do you mean myocardial bridging? If so, myocardial bridging is a structural abnormality of the heart in which a portion of a coronary artery (all of which are epicardial, or on the surface of the heart) is subendocardial (or within the muscular wall of the heart). Since this portion of the artery is surrounded by muscle tissue, when the heart is contracting vigorously, as in strenuous exercise, the artery can be narrowed or even occluded completely for a time. This can produce chest pain, rhythm disturbances (including potentially lethal arrhythmias such as ventricular tachycardia or ventricular fibrillation), or heart attacks with ANGIOGRAPHICALLY normal coronary arteries. (I.e., when you do an angiogram, the vessel can appear completely normal.)
Myocardial bridges have been identified as the cause of death in some young athletes who died during exercise and who had otherwise normal hearts and normal coronary arteries.
In article <31eda135.3129…@news.his.com>, c…@chesbay.com says…
>On 17 Jul 1996 22:55:32 GMT, be…@mail.telepac.pt (Antonio A B Lopes) >wrote:
>>What is the "bridging" ?
Dear Chris,
>produce chest pain, rhythm disturbances (including potentially lethal >arrhythmias such as ventricular tachycardia or ventricular >fibrillation), or heart attacks with ANGIOGRAPHICALLY normal coronary >arteries. (I.e., when you do an angiogram, the vessel can appear >completely normal.)
Coronary spasm is the same of "bridging" disease situation ?
>No — coronary spasm is produced by the intrinsic smooth muscle of the >coronary vessels themselves. The narrowing seen in myocardial >bridging is due to compression of the artery by the myocardial muscle >*outside* the artery.
>Coronary spasm is the same of "bridging" disease situation ?
No — coronary spasm is produced by the intrinsic smooth muscle of the coronary vessels themselves. The narrowing seen in myocardial bridging is due to compression of the artery by the myocardial muscle *outside* the artery.
On 17 Jul 1996 22:55:32 GMT, be…@mail.telepac.pt (Antonio A B Lopes)
wrote:
>What is the "bridging" ?
Do you mean myocardial bridging? If so, myocardial bridging is a
structural abnormality of the heart in which a portion of a coronary
artery (all of which are epicardial, or on the surface of the heart)
is subendocardial (or within the muscular wall of the heart). Since
this portion of the artery is surrounded by muscle tissue, when the
heart is contracting vigorously, as in strenuous exercise, the artery
can be narrowed or even occluded completely for a time. This can
produce chest pain, rhythm disturbances (including potentially lethal
arrhythmias such as ventricular tachycardia or ventricular
fibrillation), or heart attacks with ANGIOGRAPHICALLY normal coronary
arteries. (I.e., when you do an angiogram, the vessel can appear
completely normal.)
Myocardial bridges have been identified as the cause of death in some
young athletes who died during exercise and who had otherwise normal
hearts and normal coronary arteries.
In article <31eda135.3129…@news.his.com>, c…@chesbay.com says…
>On 17 Jul 1996 22:55:32 GMT, be…@mail.telepac.pt (Antonio A B Lopes)
>wrote:
>>What is the "bridging" ?
Dear Chris,
>produce chest pain, rhythm disturbances (including potentially lethal
>arrhythmias such as ventricular tachycardia or ventricular
>fibrillation), or heart attacks with ANGIOGRAPHICALLY normal coronary
>arteries. (I.e., when you do an angiogram, the vessel can appear
>completely normal.)
Coronary spasm is the same of "bridging" disease situation ?
If no, what are the difference ? Is the concept ?
Thanks, Alexandra
>No — coronary spasm is produced by the intrinsic smooth muscle of the
>coronary vessels themselves. The narrowing seen in myocardial
>bridging is due to compression of the artery by the myocardial muscle
>*outside* the artery.
One more question… please,
Displasy fibro muscular, is the same problem ?
Many thanks, Alexandra
On 18 Jul 1996 19:09:41 GMT, be…@mail.telepac.pt (Antonio A B Lopes)
wrote:
>Coronary spasm is the same of "bridging" disease situation ?
No — coronary spasm is produced by the intrinsic smooth muscle of the
coronary vessels themselves. The narrowing seen in myocardial
bridging is due to compression of the artery by the myocardial muscle
*outside* the artery.
____________________________________________________________
Chris Klugewicz
Fellow, Div. of Cardiology
University of Maryland email: c…@chesbay.com
____________________________________________________________