To effectively care for patients with heart disease, the staff development nurse is teaching new nurses hired for the intensive care unit about the Frank-Starling law. Which concept will the instructor teach?
A) Increasing preload causes an increase in left ventricular contractility.
B) Increasing preload causes a decrease in left ventricular contractility.
C) Increasing afterload causes a decrease in left ventricular contractility.
D) Increasing afterload causes an increase in left ventricular contractility.
A) Increasing preload causes an increase in left ventricular contractility.
Explanation: A) Generally speaking, increasing preload (or increasing cardiomyocyte stretch) produces an increase in the strength of ventricular contraction. This is known as the Frank-Starling law.
B) Generally speaking, increasing preload (or increasing cardiomyocyte stretch) produces an increase in the strength of ventricular contraction. This is known as the Frank-Starling law.
C) Generally speaking, increasing preload (or increasing cardiomyocyte stretch) produces an increase in the strength of ventricular contraction. This is known as the Frank-Starling law.
D) Generally speaking, increasing preload (or increasing cardiomyocyte stretch) produces an increase in the strength of ventricular contraction. This is known as the Frank-Starling law.
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