Specific: Prior to resecting a functional pheochromoctoma two medications are employed. The first,alpha blockers (Dibenzyline) prevent noradrenaline from stimulating the muscles in the walls of smaller arteries and veins. Because these blood vessels remain open blood pressure lessens When pressure oomes under control beta blockers are introduce , which inhibit the effect of adrenaline. This allows the heart to beat more slowly and with less force. Beta blockers (Tenormin) also help keep blood vessels open and relaxed.
Answered 7/1/2014
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