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Unlike general inotropes, these agents exhibit a higher level of specificity as they selectively target the myocardium. They can be categorised into four distinct groups based on their unique mechanisms of action: cardiac glycosides , beta-adrenergic agonists , phosphodiesterase III inhibitors , and calcium sensitizers.
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The term inotropic state is most commonly used in reference to various drugs that affect the strength of contraction of heart muscle. However, it can also refer to pathological conditions. For example, enlarged heart muscle can increase inotropic state, whereas dead heart muscle can decrease it.
The most common side effects during treatment with vasopressin are dizziness, angina, chest pain, abdominal cramps, heartburn, nausea, vomiting, trembling, fever, water intoxication, pounding sensation in the head, diarrhoea, sweating, paleness, and flatulence. The most severe adverse reactions are myocardial infarction and hypersensitivity. [53]
Although both vasopressors, vasopressin and epinephrine differ in that vasopressin does not have direct effects on cardiac contractility as epinephrine does. [18] Thus, vasopressin is theorized to be of increased benefit over epinephrine in cardiac arrest due to its properties of not increasing myocardial and cerebral oxygen demands. [18]
A cardiac stimulant is a drug which acts as a stimulant of the heart – e.g., via positive chronotropic action (increased heart rate) and/or inotropic action (increased myocardial contractility). They increase cardiac output (the amount of blood pumped by the heart over time).
Kidney function gradually decreases as someone ages. The elderly are also likely to be underweight. In addition, these older people tend to be dehydrated and be taking other medications. These factors increase the likelihood of developing side effects of digoxin and digoxin toxicity. Often lowering the dose is considered by the prescriber. [6]
Commonly used vasopressors include catecholamine (e.g., dopamine, norepinephrine, epinephrine) and non-catecholamine (e.g., vasopressin). but these agents are not always effective in reversing vasodilatory shock, and their use can be associated with significant side effects including limb ischemia and cardiac arrhythmia. Angiotensin II is as a ...