QuestionSBA
QuestionChoice
Positive inotropes do not increase the secretion of atrial natriuretic peptide, leading to diuresis and natriuresis. Instead, they directly increase the contractility of the heart, leading to an increase in cardiac output. This is achieved through increasing intracellular calcium concentrations.
10002180
d
Positive inotropes increase the secretion of atrial natriuretic peptide, leading to diuresis and natriuresis
QuestionChoice
Positive inotropes are drugs that increase the contractility (or force of contraction) of the heart. In cardiogenic shock, the heart is unable to pump blood effectively, leading to reduced cardiac output. By increasing the contractility of the heart, positive inotropes can help to increase cardiac output and improve perfusion to vital organs. Some examples of positive inotropes include dopamine, dobutamine and milrinone.
10002177
a
Positive inotropes increase the contractility of the heart by increasing intracellular calcium levels, leading to an increase in cardiac output
QuestionChoice
Positive inotropes do not increase sympathetic tone. Instead, they increase the contractility of the heart, leading to an increase in cardiac output.
10002179
c
Positive inotropes increase sympathetic tone, leading to an increase in heart rate and contractility
QuestionChoice
Positive inotropes do not decrease the secretion of renin, leading to decreased activation of the renin-angiotensin-aldosterone system. Instead, they directly increase the contractility of the heart, leading to an increase in cardiac output. This is achieved through increasing intracellular calcium concentrations.
10002181
e
Positive inotropes decrease the secretion of renin, leading to decreased activation of the renin-angiotensin-aldosterone system
QuestionChoice
Positive inotropes do not increase the tone of the systemic vasculature. Instead, they increase the contractility of the heart, leading to an increase in cardiac output.
10002178
b
Positive inotropes increase the tone of the systemic arterioles, leading to an increase in systemic vascular resistance
Concept
Chapter
2693
3798
Heart Failure
Topic
134
Cardiology
12982
Inotropes can be used in the treatment of cardiogenic shock in an intensive care setting.

Which of the following best describes the mechanism of action of positive inotropes?
a