Atrial flutter is an abnormality of the heart rhythm, resulting in a rapid and sometimes irregular heartbeat. Such abnormalities, whether in the rate or regularity of the heartbeat, are known as arrhythmias. The main danger of atrial flutter is that the heart does not pump blood well when it is beating too fast. When blood is not pumped well, vital organs, such as the heart and brain, may not get enough oxygen from the blood.
The range varies with the window casing. Aluminum windows are relatively common and have a life expectancy of about 15 to 20 years. They can cost $348 per window (figure 50% to 100% more for new construction windows). Other popular window options include vinyl (lasts between 20 to 40 years) and wood (lasts about 30 years).
The Answer: All sunscreens have an expiration date printed on the bottle. Typically they last a year or two, and most are good for three years. The safest bet, naturally, is to ditch old product and replace it. But in a pinch, hereâs a secret: Sunscreen is still good for six months beyond its expiration date.