Perform the indicated operations and simplify. 
Definitions:
I49.01
I49.01 is a medical classification code for Ventricular Fibrillation, an irregular heart rhythm disorder.
Epicardium
The outermost layer of the heart wall, also part of the pericardium.
Pericardium
The membranous sac filled with serous fluid that encloses the heart and the roots of the aorta and other large blood vessels.
Myocardium
The muscular layer of the heart wall responsible for the heart's pumping action.
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