Вот что пишет "current"Dopamine is an endogenous catecholamine with qualitatively different effects at varying doses. At low doses (< 3 mcg/kg/min), it predominantly stimulates dopaminergic receptors that dilate various arterial beds, the most important being the renal vasculature. Although used frequently in low doses to improve renal perfusion, there is scant evidence to support the clinical usefulness of this strategy. Intermediate doses of 3–6 mcg/kg/min cause 1-receptor stimulation and enhanced myocardial contractility. Further increases in dosage lead to predominant -receptor stimulation (peripheral vasoconstriction) in addition to continued 1 stimulation and tachycardia. Dopamine increases cardiac output, and its combination of cardiac stimulation and peripheral vasoconstriction may be beneficial as initial treatment of hypotensive patients in cardiogenic shock.
Dobutamine is a synthetic sympathomimetic agent that differs from dopamine in two important ways: It does not cause renal vasodilatation, and it has a much stronger 2 (arteriolar vasodilatory) effect. The vasodilatory effect may be deleterious in hypotensive patients because a further drop in blood pressure may occur. On the other hand, many patients with cardiogenic shock experience excessive vasoconstriction with a resultant elevation in afterload (SVR) as a result of either the natural sympathetic discharge or the treatment with inotropic agents, such as dopamine, that also have prominent vasoconstrictor effects. In such patients, the combination of cardiac stimulation and decreased afterload with dobutamine may improve cardiac output without a loss of arterial pressure.
Other agents that are occasionally used include isoproterenol and norepinephrine. Isoproterenol is also a synthetic sympathomimetic agent. It has very strong chronotropic and inotropic effects, resulting in a disproportionate increase in oxygen consumption and ischemia. It is therefore not generally recommended for cardiogenic shock except occasionally for patients with bradyarrhythmias. Norepinephrine has even stronger and 1 effects than dopamine and may be beneficial when a patient continues to be hypotensive despite large doses of dopamine (more than 20 mcg/kg/min). Because of the intense peripheral vasoconstriction that occurs, perfusion of other vascular beds such as the kidney, extremities, and mesentery may be compromised. Therefore, norepinephrine should not be used for any extended time unless plans are made for definitive treatment.
Как по мне правильно было утверждение при перетягивании канатов при использовании добутамина с норадреналином(добутамином - расширяем, норэпинефрином - сужаем). Правильный выбор инотропов и вазопрессоров по-моему можно сделать только зная цифры давление данного конкретного больного.
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