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| apex of the heart ： ウィキペディア英語版 |
Apex beat
The apex beat (lat. ictus cordis), also called the point of maximum impulse (PMI), is the furthermost point outwards (laterally) and downwards (inferiorly) from the sternum at which the cardiac impulse can be felt. The cardiac impulse is the result of the heart rotating, moving forward and striking against the chest wall during systole. It is not the apex of the heart but the point where the apex beat is felt.
It is also known as the "apical impulse".
==Identification==
The normal apex beat can be palpated in the precordium ''left 5th intercostal space'', at the point of intersection with the ''left midclavicular line''. In children the apex beat occurs in the fourth rib interspace medial to the nipple. The apex beat may also be found at abnormal locations; in many cases of dextrocardia, the apex beat may be felt on the right side.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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