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Systolic hypertension
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Systolic hypertension : ウィキペディア英語版
Systolic hypertension
In medicine, systolic hypertension is defined as an elevated systolic blood pressure (SBP).
If the systolic blood pressure is elevated (>140) with a normal (<90) diastolic blood pressure (DBP), it is called "isolated systolic hypertension".〔(【引用サイトリンク】title=The Cleveland Clinic Center for Continuing Education )
==Causes==
Systolic hypertension may be due to reduced compliance of the aorta with increasing age. This increases the load on the ventricle and compromises coronary blood flow, eventually resulting in left ventricular hypertrophy, coronary ischemia, and heart failure.
Contemporary science shows an immersed boundary method of computational illustration of a single heartbeat. Applied to physiologic models, immersed boundary theory sees the heart as a great folded semisolid sail fielding and retrieving a viscous blood mass. The sail, likened to Windkessel effect physiology, gives and receives a load under time-ordered phases. Decreasing compliance of the sail heralds the onset of systolic hypertension.

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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