Measuring Width. 1  1. Move the refrigerator. To get many of the right measurements, you should move the refrigerator to allow access to the space. 2  2. Measure the space of the opening. It might be tempting to measure the size of your current refrigerator. 3  3. Use a retractable measuring tape. Place one end against the wall.  4. Repeat the measurement.
Blood pressure varies from one person to another. A drop as little as 20 mmHg, can cause problems for some people. There are different types and causes of low blood pressure. Severe hypotension can be caused by sudden loss of blood (shock), severe infection, heart attack, or severe allergic reaction (anaphylaxis).Orthostatic hypotension is caused by a sudden change in body position. drop as little as 20 mmHg, can cause problems for some people. There are different types and causes of low blood pressure. Severe hypotension can be caused by sudden loss of blood (shock), severe infection, heart attack, or severe allergic reaction (anaphylaxis).
A number of medications also can cause orthostatic hypotension, particularly drugs used to treat high blood pressure â diuretics, beta blockers, calcium channel blockers and angiotensin-converting enzyme (ACE) inhibitors â as well as antidepressants and drugs used to treat Parkinson's disease and erectile dysfunction.ome medical conditions can cause low blood pressure. These include: 1  Pregnancy. 2  Because a woman's circulatory system expands rapidly during pregnancy, blood pressure is likely to drop. 3  This is normal, and blood pressure usually returns to your pre-pregnancy level after you've given birth.