Words similar to alpha-adrenergic
Example sentences for: alpha-adrenergic
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A double-blind, active-controlled hypertension component is designed to compare the rate of fatal coronary heart disease (CHD) or nonfatal myocardial infarction (MI) (the primary endpoint) in high-risk hypertensive participants, aged 55 years or older, between those randomized to treatment initiated with a diuretic (chlorthalidone) and treatment initiated with each of three alternative antihypertensive drugs: a calcium-channel blocker (amlodipine), an angiotensin-converting enzyme (ACE)-inhibitor (lisinopril), or an alpha-adrenergic blocker (doxazosin).
Many studies have shown that chronic intravenous infusion of norepinephrine is sufficient to cause hypertrophy, and that various forms of hypertrophy are linked to a decrease in either beta-adrenergic receptor density or a decreased responsiveness to beta-adrenergic stimulation [ 46 48 49 56 57 58 59 60 61 62 63 ] . Barth, for example, showed that norepinephrine infusion induced left ventricular hypertrophy that could be prevented by an adrenergic-receptor blocker [ 58 ] . It has been suggested that ornithine decarboxylase is a link between beta-adrenoreceptors and stimulation of tissue growth factor, which results in hypertrophy [ 64 ] . However, recent studies have focused on alpha-adrenergic reception as a mediator of cardiac hypertrophy [ 35 ] , although some question the role of the alpha-adrenergic receptor as a hypertrophic mediator in vivo [ 34 ] . To date, no published studies of which we are aware have examined alpha-adrenergic reception and the development of cardiac hypertrophy with iron deficiency.
Future investigation is warranted into the potential alpha-adrenergic role in this hypertrophy.
Most have demonstrated alterations in either plasma or heart norepinephrine content, and a de-sensitization of the beta-adrenergic receptors of the heart [ 24 25 26 27 28 29 30 31 32 33 ] . Recently, the alpha-adrenergic receptor has been shown in vitro to be an important modulator of ventricular hypertrophy.
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