The re-hemorrhage rate is highest during the first 24 hours following SAH. This is occasionally related to early angiography. Fifty percent of patients will go on to re-bleed within the first 6 months, unless the aneurysms are treated, with an annual re-bleed rate of 3%. Early surgery clearly decreases the risk of re-bleed, although a small risk remains from incomplete clipping or the presence of multiple aneurysms.
Risk factors for re-bleeding include time between ictus and angiography, and between ictus and definitive management of the aneurysm. Also of importance are the neurological grade and conscious level of the patient and the presence of hypertension or an intrac-erebral hematoma (ICH). In the long term, factors influencing the re-bleed rate include aneurysm size and location and the presence of hypertension.
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Your heart pumps blood throughout your body using a network of tubing called arteries and capillaries which return the blood back to your heart via your veins. Blood pressure is the force of the blood pushing against the walls of your arteries as your heart beats.Learn more...