In the conduction system of the heart, which of the following components is stimulated after the sinoatrial node?

A. C-reactive protein (CRP): CRP is typically tested using a serum sample collected in a gold or red-top tube, not a light blue tube.
B. Partial thromboplastin time (PTT): PTT is a coagulation test that requires a light blue top tube containing sodium citrate, which acts as an anticoagulant. This tube is specifically used for coagulation studies.
C. Glucose: Glucose levels are commonly measured using a gray-top tube containing sodium fluoride to inhibit glycolysis, not a light blue tube.
D. Lactate: Lactate levels are typically measured using a gray-top tube or green-top tube, depending on the specific protocol, not a light blue tube.

A. Exaggerate lip movements. Exaggerating lip movements can make speech more difficult to understand. Instead, normal, clear speech should be used.
B. Speak in high-pitched tones. High-pitched tones are often harder for individuals with hearing loss to understand. Speaking in a normal, moderate tone is more effective.
C. Use long sentences. Long sentences can be confusing. It is better to use short, simple sentences to aid comprehension.
D. Stand in the patient's direct line of vision. Standing in the patient's direct line of vision allows the patient to read lips and see facial expressions, which aids in understanding.