Final answer:
The statement is true as an S4 heart sound and a displaced PMI can indicate left ventricular hypertrophy, associated with a stiff or enlarged left ventricle.
Step-by-step explanation:
This statement is true. An S4 heart sound is associated with the contraction of the atria pushing blood into a stiff or hypertrophic ventricle, often indicating failure of the left ventricle. Listening to heart sounds through auscultation with a stethoscope can provide vital clues to the functioning of the heart, where one can hear the sounds produced by the closing of the atrioventricular valves ("lub") and the semilunar valves ("dub"). The presence of an S4 heart sound, known to cardiologists as the "Tennessee gallop," may suggest pathological enlargement, or hypertrophied, conditions of the heart, generally for no known cause. A displaced PMI can also suggest changes in the size or position of the heart, often due to left ventricular hypertrophy.