Premature ventricular contractions are common. Many people have premature ventricular contractions without any symptoms. Premature ventricular contractions may be more common among older patients, patients with high blood pressure, and patients with heart disease. Premature ventricular contractions can also occur in young healthy individuals without heart disease or high blood pressure.
Full Answer. The midnight sun is a natural phenomenon. It reaches its peak during the summer solstice, which occurs around June 21 each year. On the day of the solstice, areas in Norway and in other regions around the world north of the Arctic Circle may receive almost 24 hours of sunlight. The sun in these areas continues to shine through the midnight hour, which is how the term midnight sun arose.
The scientific name for Midnight Sun is Polar Day, the opposite is Polar Night. As the upper edge of the solar disc disappears below the horizon the Sun has set, and there's no longer Midnight Sun. The moment the solar disc again becomes visible above the horizon, it's sunrise.ne of the reasons that the Midnight Sun doesn't end directly on the polar circle, but can be seen a little south as well, is refraction; The fact that light bends when it hits the Earth's atmosphere. Refraction makes the Sun visible above the horizon several minutes before it actually gets there.