alexa Effect of PGA1, PGE2, diazoxide on myocardial contractile force.
Medicine

Medicine

Alternative & Integrative Medicine

Author(s): Slotkoff LM, Rose JC, Quang LS, Kot PA

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Abstract Experiments were conducted in anesthetized dogs comparing the effects of PGA1, PGE2, and diazoxide on myocardial contractile force (MC). The three agents were given in successive bolus injections intravenously in equidepressor doses and myocardial contractile force was measured by means of a strain-gauge arch sutured onto the right ventricle. The drugs were administered before and during ganglionic (hexamethonium) and beta-blockade (practolol). Both PGA1, and PGE2 caused a marked rise in MC, 24 and 20 per cent, respectively, before blockade and 10 and 11 per cent during blockade. Diazoxide caused only a minimal rise, 0.9 per cent, before blockade and a marked fall, 27 per cent, during blockade. Diazoxide administration during left ventricular bypass indicates that the decrease in MC is not a direct result of alterations in preload or after load. It is suggested that hypertensive patients treated with autonomic blocking agents may be more susceptible to heart failure in response to diazoxide therapy.
This article was published in J Lab Clin Med and referenced in Alternative & Integrative Medicine

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