Final answer:
The nurse should document S1 - Lub heart sound in the client's medical record. S1 is the sound created by the closing of the atrioventricular valves during ventricular contraction, and it is commonly described as a 'lub' sound. It is heard when the mitral and tricuspid valves close after the atria contract and blood is pushed into the ventricles.
Step-by-step explanation:
The nurse should document S1 - Lub heart sound in the client's medical record. In a normal, healthy heart, S1 is the sound created by the closing of the atrioventricular valves during ventricular contraction. It is commonly described as a 'lub' sound. This sound is heard when the mitral and tricuspid valves close after the atria contract and blood is pushed into the ventricles.