Which condition is characterized by a sudden drop in blood pressure?

Hypotension is defined as a condition in which there is an abnormally low blood pressure. This sudden drop in blood pressure can occur for several reasons, including significant blood loss, dehydration, severe infections, or a reaction to medications. In clinical practice, recognizing hypotension is crucial because it can lead to inadequate blood flow to vital organs, potentially resulting in shock, organ failure, or even death if not treated promptly.

Hypertension refers to high blood pressure, which is not relevant in this context. Arrhythmia involves irregular heartbeats that can affect cardiac function but does not specifically indicate a drop in blood pressure. Respiratory distress pertains to difficulties in breathing, which may not directly correlate with blood pressure changes. Thus, hypotension is the condition specifically characterized by a significant and sudden decrease in blood pressure, making it the correct answer.