CAMRT Radiography Practice Exam

What condition describes low blood pressure and dizziness due to standing up too quickly?

1. Hypertensive crisis

2. Orthostatic hypotension

3. Cardiogenic shock

4. Postural tachycardia syndrome

The correct answer is: Orthostatic hypotension

The condition characterized by low blood pressure and dizziness upon standing up too quickly is known as orthostatic hypotension. This phenomenon occurs when a person transitions from a sitting or lying position to standing, causing a temporary drop in blood pressure. Normally, the body compensates for this positional change through various mechanisms, including heart rate increase and vascular constriction, to maintain adequate blood flow to the brain. In orthostatic hypotension, these compensatory mechanisms may not be sufficient, leading to symptoms such as lightheadedness, dizziness, or even fainting. This condition can be more commonly observed in older adults or those taking certain medications that affect blood pressure regulation. Understanding the other options helps clarify why they do not fit this description. A hypertensive crisis involves dangerously high blood pressure levels, which is the opposite of low blood pressure. Cardiogenic shock is a severe condition where the heart fails to pump effectively, typically resulting in various symptoms, but it does not specifically describe blood pressure changes upon standing. Postural tachycardia syndrome involves an abnormal increase in heart rate upon standing, rather than a drop in blood pressure leading to dizziness. Thus, orthostatic hypotension specifically addresses the issue of low blood pressure and dizziness related to changes in posture.