Which assessment finding presents the highest risk for cardiac shock?

• A. Respirations 22 breaths/min
• B. Pulse 104 beats/min
• C. Temperature 98.9°F (37.2°C)
• D. Blood pressure 114/68 mm Hg

Answer: (B)

An elevated pulse signals the body's attempt to maintain adequate blood flow when perfusion starts to fall. This tachycardia is a key early sign that the heart is compensating for reduced stroke volume or circulating volume, putting the patient at higher risk of progressing toward cardiac shock. Even though blood pressure remains normal here, and temperature and respiratory rate are not as specifically linked to impending shock, the faster heart rate directly reflects the body's effort to preserve output. If this compensatory mechanism continues or fails, perfusion will worsen.

The other findings are less ominous on their own in this context: a mildly elevated breathing rate can occur with anxiety or discomfort; a normal temperature doesn’t point to infection driving shock; and a normal blood pressure suggests decompensation hasn’t occurred yet.