An unstable cardiac patient may present with which of the following symptoms?

An unstable cardiac patient typically exhibits symptoms that indicate a significant compromise in their cardiovascular condition. Hypotension, or low blood pressure, is a critical indicator of instability as it suggests that the heart might not be effectively pumping blood to meet the body's needs. This can result in inadequate perfusion to vital organs, leading to potentially life-threatening situations.

Diaphoresis, or excessive sweating, is another physical sign commonly associated with instability. It can be a manifestation of the body's response to stress due to decreased perfusion and increased sympathetic nervous system activity during a cardiac event. Together, hypotension and diaphoresis serve as warning signs that necessitate urgent medical evaluation and intervention.

In contrast, stable vital signs with no chest pain, elevated blood pressure with anxiety, or normal skin color and stable heart rate do not necessarily indicate instability. These presentations could suggest a patient who is more stable, potentially having a manageable condition, rather than showing signs that demand immediate attention. Thus, the symptoms of hypotension and diaphoresis are key indicators of an unstable cardiac status.